Why decibels in acoustics - Acoustics Basics HEAD acoustics International 2022-08-16 | Whether for sound pressure measurements or sound power measurements, the measured values are always given in dB.Why are decibel values given in acoustics?This tutorial explains why this is useful and helpful in acoustics and how to calculate decibel values.Links to the next tutorials of this series:Part 2 - Handling decibel values with easeyoutu.be/7t_lKV9miI4Part 3 - Adding - averaging decibel valuesyoutu.be/4LaxZebh7RoPart 4 Working with decibels - Analysis Softwareyoutu.be/dQQnNFFlzhQ
Top 10 gadgets of HEADlab HEAD acoustics International 2024-03-21 | The sophisticated accessories make the HEADlab frontend so flexible and universally applicable.In this video, Till Papenfus and Dominik Bauer reveal their personal top 10 accessories for the HEADlab frontend series.Anyone can just park it in a test cabinet on a test bench. HEADlab is also at your side for all other measurement scenarios.0:00 Introduction & Overview0:15 labRFC1:05 labMDM2:30 HSM V2:48 labSMP3:51 labRCH3:39 labRCX4:51 labSAR6:26 Offline Frontends7:18 labSPA7:46 labMA8:47 Outro & Link
DATaRec 4 Replacement with HEADlab HEAD acoustics International 2024-03-20 | With the DATaRec 4 we do data acquisition for 20 years almost. Unfortunately, this series has been discontinued.In this video we present our equal successor HEADlab. This frontend system also relies on the modular design, which provides the necessary flexibility in daily practice.And it has a few more advantages.
Interview Sottek Hearing Model - Advanced Acoustic Analyses HEAD acoustics International 2024-03-12 | The Sottek Hearing Model is a new basis for many advanced acoustic analyses.Well known from the Hearing Model tonality analysis, this method of frequency analysis is also increasingly used for many other acoustic phenomena. Learn more about the history and methodology of this modern and powerful analysis technique.
FFT analysis settings made easy HEAD acoustics International 2024-03-06 | FFT analysis can be used to convert time data into the frequency domain. This allows the frequencies contained in the noise to be determined along with their levels.However, the results depend heavily on the selected analysis settings. Time and frequency resolution should be set to match the noise and the human resolution.This tutorial explains these effects using examples. Furthermore, an alternative method - the hearing model according to Prof. Dr. Sottek - is presented.
Experience NVH CAE results on the road with PreSense & SoundCar HEAD acoustics International 2023-08-24 | Noise and vibration calculated with CAE can be experienced, presented and compared natively and interactively.Use the SoundCar in combination with our PreSense NVH simulator for a significantly faster and more targeted development of your vehicles.The NVH Simulator User Group Meeting:In November 2022, we celebrated the successful premiere of our hybrid NVH Simulator User Group Meeting. The participants followed interesting testimonies from Honda, Mercedes Benz, Toyota, and HEAD acoustics, who shared their experiences using PreSense, the interactive NVH simulator for virtual engineering & prototyping, in their everyday business.Watch the presentations and several application videos of the different PreSense variants. Register here to get access: https://head.direct/VJTCV
HEAD acoustics India in the HEADquarter HEAD acoustics International 2023-08-22 | Manjula Srinivas, president of the newly established subsidiary HEAD acoustics India, visits the headquarters to get an overview of the latest product releases. She was also shown how YouTube tutorials are produced at HEAD acoustics.Learn more about Manjula Srinivas and HEAD acoustics India.Get in touch with HEAD acoustics India and send your email to:manjula.srinivas@head-acoustics.com
HEAD acoustics products 2023 HEAD acoustics International 2023-08-22 | Get an overview of our products:HEAD acoustics offers cutting edge equipment for:- Measurement and analysis of sound and vibration - Testing and optimization of voice and audio quality
Active Sound Design with PreSense NVH Simulator HEAD acoustics International 2023-06-28 | Experience Active Sound Design on the Road!One of the most challenging tasks for Electric Vehicle developers is Active Sound Design. In the latest video from the NVH Simulator User Group Meeting 2022, we show how our Mobile Simulator enables the evaluation and tuning of ASD in an electric car in a real-life situation. So, put your headphones on and enjoy! The NVH Simulator User Group Meeting:In November 2022, we celebrated the successful premiere of our hybrid NVH Simulator User Group Meeting. The participants followed interesting testimonies from Honda, Mercedes Benz, Toyota, and HEAD acoustics, who shared their experiences using PreSense, the interactive NVH simulator for virtual engineering & prototyping, in their everyday business.Watch the presentations and several application videos of the different PreSense variants. Register here to get access: https://head.direct/VJTCV
Advanced ANC Headset Testing HEAD acoustics International 2023-05-11 | For testing, comparing, and optimizing Active Noise Cancelling (ANC) headsets and improving the audio and voice quality as well as noise attenuation, you need a professional and comprehensive testing solution that integrates seamlessly.HEAD acoustics delivers voice communication testing solutions based on binaural sound recordings, with advanced software and state-of-the-art hardware like artificial heads, unique background noise simulation possibilities with 3PASS, and much more. Get in touch with us & find out more: head-acoustics.com/applications/audio-speech/active-noise-cancellation
Transfer Path Analysis made easy with the SoundSeat HEAD acoustics International 2023-04-25 | On November 24, 2022, we celebrated the successful premiere of our hybrid NVH Simulator User Group Meeting. The participants followed interesting testimonies from Honda, Mercedes Benz, Toyota, and HEAD acoustics, who shared their experiences using PreSense, the interactive NVH simulator for virtual engineering & prototyping, in their everyday business.Anyone who could not attend the User Group Meeting now has the opportunity to watch the presentations and several application videos of the different PreSense variants.Register here to get access: https://head.direct/VJTCV
Use the test bench time efficiently HEAD acoustics International 2023-04-19 | Test benches are expensive and should run continuously.For many tests, extensive modifications are necessary between different body states. However, there is a simple trick to ensure that the test stand can continue to be used to its full capacity.Instead of planning for additional test stand capacity in the event of bottlenecks, the use of mobile measurement technology ensures that work can continue on any test object at any time and that measurements can be taken immediately.Do not tie the measurement technology to the test stand, but to the test object for efficient and significantly lower invest.Our front ends have always followed this philosophy.Find out more:head-acoustics.com/products/data-acquisitionor get in contact with us directly for a presentation at your site.Email to: sales@head-acoustics.com
Acoustic test bench measurements with ArtemiS SUITE HEAD acoustics International 2023-04-13 | Acoustic measurements are to be carried out efficiently and easily on the test bench. That's why ArtemiS SUITE software allows you to use Standardized Testing to automate complex test scenarios from measurement and analysis to the final display.See in this video on the basis of the examples powertrain acoustics and rolling noise measurements to see how easy and fast this is.Furthermore, a completely new method for the correct recording of sound power levels. With the joint venture with HoloMetrix GmbH you are intuitively supported during the measurement as well as during the evaluation by Augmented Reality. It has never been so easy. Learn more about this technique: holo-metrix.comFinally, you will see the intuitive workflow for performing a modal analysis in the ArtemiS Suite.If you would like to have these functions demonstrated on your test dyno, please contact us at sales@head-acoustics.com. We will be happy to make an appointment and take a look at the application together with you.
Road noise evaluation with PreSense NVH Simulator HEAD acoustics International 2023-03-16 | On November 24, 2022, we celebrated the successful premiere of our hybrid NVH Simulator User Group Meeting. The participants followed interesting testimonies from Honda, Mercedes Benz, Toyota, and HEAD acoustics, who shared their experiences using PreSense, the interactive NVH simulator for virtual engineering & prototyping, in their everyday business.Anyone who could not attend the User Group Meeting now has the opportunity to watch the presentations and several application videos of the different PreSense variants.Register here to get access: https://head.direct/VJTCV
Applications of SQuadriga III HEAD acoustics International 2022-10-28 | The SQuadriga III was born from the constant exchange with our customers. The multitude of different applications, always accompanied by the desire that the tasks should be done quickly and easily, have made our stand alone frontend what it is today:A beloved companion for all situations of an NVH engineer.We thank our customers for the many suggestions that made this product so great.Thank youRead more:https://www.head-acoustics.com/produc...Meet us:head-acoustics.com
Working with decibels - Analysis Software HEAD acoustics International 2022-09-13 | Nowadays, the evaluation of acoustic measurements is done on the computer. With simple drag&drop gestures, sound pressure levels, frequency analyses and also the loudness of all possible measurements can be specifically calculated and evaluated.How this is done is shown with a simple example and a complete measurement of a washing machine.There is a lot to learn.Enjoy!Read more about Compact Analysis:head-acoustics.com/products/analysis-software/compact-analysisLinks to the previous tutorials of this series:Part 1 - Why decibels in acoustics - Acoustics Basicsyoutu.be/dNso7JfnEA4Part 2 - Handling decibel values with easeyoutu.be/7t_lKV9miI4Part 3 - Adding - averaging decibel valuesyoutu.be/4LaxZebh7RoMeet us at:head-acoustics.comIn these tutorials we can only give you a first introduction to our software ArtemiS SUITE.For professional use in everyday work, we offer you targeted training courses in the areas relevant to you. Learn the comprehensive handling of our measurement and analysis technology- as a seminar at our premises in Herzogenrath, - as a team training at your site - or as online training on your computer. Our training center has the best solution for you.Find out more about our comprehensive range of training courses here head-acoustics.com/knowledge/face-to-face-trainingsOr ask for your personal training offer according to your own ideas at training@head-acoustics.com
Adding & averaging decibel values HEAD acoustics International 2022-08-30 | Adding or averaging decibel values seems like a closed book. But the calculation with these hacks shown here is very easy to do with a calculator or in your head.In words:Addtion of 2 decibel values:* Divide the decibel values by 10.* Then calculate 10 to the power of this number - then add them together.Now back to the logarithmic system:* Calculate the log of the sum. Now we have "Bel"* Multiply the result by 10 and we get the deci-Bel value .Average of decibel values: Minute: 4:44The same as Addition, but before you the log you first have to divide the summation of all summands by the number of summands. (This is the way you calculate an average in any case)This is part 3 of a decibel explaining series.Links to the other tutorials of this series:Part 1 - Why decibels in acoustics - Acoustics Basics (Recommended)youtu.be/dNso7JfnEA4Part 2 - Handling decibel values with easeyoutu.be/7t_lKV9miI4--Part 4 Working with decibels - Analysis Softwareyoutu.be/dQQnNFFlzhQ
Handling decibel values with ease HEAD acoustics International 2022-08-23 | What does the indication - 6dB mean? To what extent does the sound pressure or the sound power change? The physical and mathematical relationships are illustrated here in an easily understandable way.Links to the next tutorials of this series:Part 1 - Why decibels in acoustics - Acoustics Basicsyoutu.be/dNso7JfnEA4--Part 3 - Adding - averaging decibel valuesyoutu.be/4LaxZebh7RoPart 4 Working with decibels - Analysis Softwareyoutu.be/dQQnNFFlzhQ
Modal Analysis Tutorial - Quick guide from setup to results HEAD acoustics International 2022-06-28 | Modal analysis is presented using a simple example.We show the required sensors, measurement technology and software.The results of the modal analysis are briefly presented.It can be that simple.Learn more:www.modal-analysis.com
Automotive Audio Testing: Multi-Dimensional Audio Quality Score | Application Online Seminar HEAD acoustics International 2022-05-16 | Multi-Dimensional Audio Quality ScoreAn overall satisfying user experience arguably has become an essential USP of modern vehicles – more so than MPG, MPHs, and power. The sound system's audio quality, in particular, is contributing increasingly to meeting this need. So far, testing and tuning automotive audio systems has relied heavily on frequency response measurements, which arguably are a vital sound quality indicator. However, the frequency response tells us only a part of the whole story. So, what more is there to sound quality perception?In our first seminar, we introduced a new quality score, and in the second, we showed its application in headphones sound assessment. This third seminar will present how to apply this MOS metric for evaluating audio quality in automotive audio systems by MDAQS (Multi-Dimensional Audio Quality Score). We will examine the performance of several vehicles' audio systems in terms of both frequency response and MDAQS, elaborating on how MDAQS helps you get better and more accurate indicators for audio playback performance than frequency response measurements.
Headphone Testing: Multi-Dimensional Audio Quality Score | Application Online Seminar HEAD acoustics International 2022-04-21 | Audio quality is an essential criterion for headphone users, and manufacturers strive for efficient sound quality evaluation that meets real-life challenges. The frequency response arguably is one of the vital sound quality indicators. However, it tells us only a part of the whole story. So, what more is there to sound quality perception?This online seminar will present how to apply this new MOS metric for evaluating audio quality in headphones with MDAQS (Multi-Dimensional Audio Quality Score). We will examine the performance of several headphones in terms of both frequency response and using MDAQS, elaborating on how MDAQS helps you get better and more accurate indicators for audio playback performance than frequency response measurements.
Multi-Dimensional Audio Quality Score (MDAQS) – Fundamentals and Technical Solutions | Introduction HEAD acoustics International 2022-04-19 | MDAQS is a novel method for instrumental evaluation of audio quality. It comprises the key criteria for perceived audio playback quality – timbre, distortion, immersiveness – along with an overall MOS value to allow for quick assessment and good comparability.The focus of this seminar will be on the general assessment of audio quality and the technological background of the MDAQS method. We will introduce the listening tests that were specifically designed for the development. Some of the core analysis modules that were derived from the results of the listening tests will be explained along with their combination to the final quality scores. Finally, we will describe the general way of using MDAQS.
Realistic Audio Scenarios – headphones required HEAD acoustics International 2021-10-14 | Check out 3PASS, our system to test ANC headsets.Learn more about the possibilities of our powerful acoustic measurement & simulation systems.head-acoustics.com/products/playback-simulation/3pass-labOr simply send us your questions and applications via email:telecom@head-acoustics.com
New Artificial HEAD (HATS) 2021 HEAD acoustics International 2021-10-05 | HEAD acoustics introduces a new modular concept in artificial head technology, which offers exchangeable ear simulator and pinnae - human ear canal (HEC).The one for all artificial head is the device to measure the sound quality of e.g.Headset Mobile phonesANC Devices
Defining Points and Coordinates | Introduction to Modal Analysis | Part 2 HEAD acoustics International 2021-06-18 | In this video playlist you will learn how to make your first steps in this typical analysis method in NVH development. We will teach you how to start a modal analysis on an object: The first step is to define your measuring points. Next, define a suitable coordinate system for your test object. Modal analysis is much easier, if these first steps have been made correctly . The used software for modal analysis can be retrieved here:www.modal-analysis.com (free test period of 3 weeks with free demo data and video tutorials) ;-)Corresponding Videos to Modal Analysis:Part 1 - What is a mode shape? - youtu.be/H-oiwp02t_g - Part 3 - Roving Hammer Method - youtu.be/F-hpjhOKx3g Part 4 - Roving Accelerometer - youtu.be/NIBNS7j5A8E Part 5 - Different hammer tips - youtu.be/9I7M3dJVETs Part 6 - Right sampling rate and block size for impulse tests NVH - youtu.be/p6EdJSXH_gYPart 7 - Quick guide: Modal Analysis Tutorial - youtu.be/KeR5D-YWtxI
Rethinking Structural Analysis - Modal Analysis in new light HEAD acoustics International 2021-04-29 | A look behind the scenes tells us why HEAD acoustics decided to offer a comprehensive solution for structural analysis.The numerous steps fromimpulse and time domain measurementsincluding Curve Fitting using Poly-LSCF algorithmleading to live shapes and mode shapesto be analysed and easily compared.All in a clearly structured, intuitive workflow within one software. The whole structural analysis at your fingertips.It was clear we can shed new light on this subject.
Advanced acoustic analysis roughness - psycho acoustic in practise HEAD acoustics International 2021-03-24 | Devices and machines require good sound. Sound pressure levels and third octave bands only convey the sound energy - but not the sound quality.Special psychoacoustic analyses such as roughness analysis can be used to analyze disturbing frequencies in the noise spectrum and specifically optimize the sound design.In this tutorial, we will introduce roughness analysis using two sample data - two closely spaced sine tones and a real aircraft with strong turbine noise.Using the roughness analysis and the sound engineering tool the noise can be detected and analyzed in depth with just a few clicks.Find out more:Background to the analysis:global.head-acoustics.com/downloads/eng/application_notes/Psychoacoustic_Analyses_II_e.pdfOption to buy:cdn.head-acoustics.com/fileadmin/data/en/Data-Sheets/AS/ASM_15/D51103e-ASP-103-ArtemiS-SUITE-Psychoacoustics-Advanced-Analysis.pdfMeet us:head-acoustics.com
ANC Headset Testing – Making Sense of the Noise | Application Online Seminar HEAD acoustics International 2021-02-26 | Not that long ago, we got together with the awesome team of the headphone experts at Head-Fi to take the very best ANC headphones we could find. We wanted to see how these headphones performed in terms of: ANC performanceTalk-through mode capabilitiesVoice callingIn the course of this one hour session, we will: Present our state-of-the-art test solutionDiscuss where the HEAD acoustics approach differs and exceeds current practicesShare results and interpret the data from two headset test sessions
A²B – A new technology for acoustic testing in vehicles | Application Online Seminar HEAD acoustics International 2021-01-28 | The Online Seminar provides information about our new Automotive Audio Bus (A²B®) interface for testing and optimizing all types of products connected to this bus proliferating in the automotive industry.Key topics:Present our solution coreA2BCompare coreA2B with other solutions on the marketDiscuss its applicability in various measurement tasks, such as ITU-T P.1100/1110 for vehicle hands-free ITU-T P.1140 for in-car communication Electro-acoustic testing and advanced debugging
Operating Deflection Shape (ODS) analysis - Tutorial HEAD acoustics International 2020-12-17 | To understand the vibration behavior of a test object, ODS analysis is a simple and effective method. With the help of ODS analysis, all vibration modes and modes of the object in operation are made visible.In this tutorial we will show you how easy it is to visualize the vibration modes of your component.ODS in three steps.***************************You will need:- A measurement object- At least 2 accelerometers (one stays as a reference point).- A HEAD acoustics compatible frontend- The following modules of the analysis software ArtemiS SUITE: - ASM 5000 - Creation and handling of the measurement points - ASM 5004 - Data Acquisition (alternatively measurement data can be converted). - ASM 5040 - Operating Deflection Shape Analysis Module (link below).Please contact us if you would like to have a personal presentation of the procedure or if you would like to test it yourself for a while.To do so, either contact your HEAD acoustics sales engineer directly or tell us your interest at sales@head-acoustics.com.Data sheet for the new ODS module:head-acoustics.com/downloads/eng/artemis/D5040_ArtemiS_suite_Operating_Deflection_Shape_Analysis_Module_e.pdfGerman Version here:youtu.be/QzfDkkEEFZA
Advanced FFT Analysis HSA - frequency and time resolution as you want HEAD acoustics International 2020-11-11 | FFT analysis is often used for the acoustic analysis of airborne sound or vibrations. However, this method has a conflict between high-frequency resolution and a high time resolution. In this tutorial, we present a real alternative to the classical FFT, which offers much more precise insights than an FFT can provide.How can I use the HSA?The HSA (High Resolution Spectral Analysis) was invented and developed by HEAD acoustics.HSA is included in the ASP003 module of the analysis software Artemis SUITE, which offers many more high-performance analyses.Please contact us or your local sales partner to learn more about this analysis. info@head-acoustics.deMore information in advance:cdn.head-acoustics.com/fileadmin/data/en/Data-Sheets/AS/ASM_15/D51003e-ASP-003-ArtemiS-SUITE-Advanced-Analysis.pdf
Dedicated NVH consulting services for your vibrational challenges HEAD acoustics International 2020-10-29 | Meet our NVH experts from HEAD acoustics Consulting.With strong dedication and customer focus the consulting team supports customers with: • Improving product sounds quality• Understanding customer experiences and expectations• Finding the root cause of sound quality issues Advanced tools and innovative methods assure optimum results:• Sound quality metrics based on Machine learning • Binaural transfer path analysis• Experimental and numerical modal analysis• NVH simulation and virtual vehicle
Optimizing Listening Effort in Vehicles | Application Online Seminar HEAD acoustics International 2020-10-27 | Automotive telecommunication applications typically involve lots of background noise. For all signals meant to be heard and interpreted in the vehicle, designers have turned to hardware and software solutions for improving the quality and intelligibility of the presented audio signal. Beamforming techniques, audio zones (AZ), bandwidth extension (BWE) and in-car communication (ICC) are some of the technologies permeating into vehicles today.Qualification and optimization of these technologies is essential for the market success and a good user experience. However, it has been a challenge to find appropriate metrics for evaluating the efficacy of said solutions. This seminar introduces into optimizing listening effort in vehicles.Key topics:Feasibility of listening effort – a new standardized method (ETSI TS 103 558) – for automotive applicationsPractical test results of real devices
Optimizing Listening Effort for Communication Devices | Application Online Seminar HEAD acoustics International 2020-09-16 | In this online seminar we will introduce the setup for acoustic end-to-end testing by the use of two acoustic test rooms. We will discuss this setup in the context of audio conferencing solutions as well as other use cases. You will learn both of the challenges of this setup and the added value it provides. As in previous parts of the series, we use real world devices and their test results to make the various test parameters easier to understand and to substantiate the theoretical background.Key topics• New standardized MOS metric for listening effort• HEAD acoustics implementation: ABLE• Practical application
Acoustic end-to-end measurements | Application Online Seminar HEAD acoustics International 2020-09-03 | In this online seminar we will introduce the setup for acoustic end-to-end testing by the use of two acoustic test rooms. We will discuss this setup in the context of audio conferencing solutions as well as other use cases. You will learn both of the challenges of this setup and the added value it provides. As in previous parts of the series, we use real world devices and their test results to make the various test parameters easier to understand and to substantiate the theoretical background.Key topics:Acoustic end-to-end measurement setupThe principle of time-synchronous noise compensation(TNC)Parameters that are impossible to measure without TNCPractical examples
Audio conferencing solutions: Client and Advanced Testing | Application Online Seminar HEAD acoustics International 2020-08-13 | This online seminar provides a deep-insight for manufacturers and designers of VoIP conferencing devices and systems on basic and advanced parameters, hardware and measurement setup, and testing procedures – all in order to ensure optimum communication quality and to enhance the user experience in audio conferences.Key topics:Better look under the hood of audio conferencing platforms Advanced parameters, such as perceptual echo performance (EQUEST), POLQA, double-talk, including multi-talker scenariosActual measurement results of some typical conferencing solutions
Audio Conferencing Solutions: Hardware and Basic Testing | Application Online Seminar HEAD acoustics International 2020-08-05 | This web seminar provides a deep-insight for manufacturers and designers of VoIP conferencing devices and systems on basic and advanced parameters, hardware and measurement setup, and testing procedures – all in order to ensure optimum communication quality and to enhance the user experience in audio conferences.Key topics:Measurement setup for evaluating communication quality of various componentsBasic parameters, such as frequency response, delay, echo, mean opinion scores for speech quality in silence (POLQA) and with background noise (3QUEST) Comparison between a few devices
How to optimize audio conferencing solutions to improve communication quality? HEAD acoustics International 2020-04-28 | For more information visit optimize-audio-conferences.comThis web seminar provides in-depth information on what communication quality is, the factors that distinguish good communication quality from poor communication quality and strategies for optimization of devices and services.Key topics:Parameters that influence communication quality like speech quality, speech intelligibility, listening effort, double-talk performance, user environment with noise and reverberation, latency, and echo Technical aspects of systems and configurations used in conference scenarios Tools, test scenarios and automated test sequences to improve: - Headsets (wired and cordless) - All type of conference systems - All type of telephony terminals - PCs, tablets and other smart devices - Smart speakers - Modems and interfaces (e. g. Bluetooth®, DECT, Wi-Fi)
Finding the best motorbike sound HEAD acoustics International 2020-04-09 | Thanks @The Dr. Jekill & Mr. Hyde Company for sharing your opinion on working with us.See how they benefit from our SQuadriga III handheld systems in combination with SQala software for jury testing in their daily work. The result? Exhaust systems with breath-taking sound, optimized for the global markets.
dB(A) or loudness - best analysis for my NVH task HEAD acoustics International 2020-02-13 | A proper analysis is key when comparing different noises to analyze which one is louder. But what is the best analysis for this acoustic test application?In this tutorial we introduce two different analyses: • Sound pressure level dB(A)• Loudness soneWe compare the performance with respect to the following aspects:• Scaling 01:20• Frequency Weighting (A B C D) 03:43• Time Response 08:25• Masking Effect 12:04• Frequency Resolution 12:30• Level of detail 15:31• Time Resolution 17:21 • Overall Summation 20:29All analyses are presented wihtin the acoustic analysis software ArtemiS SUITE, which offers these flexible options. German version:youtu.be/h6sQ-iQzd-c0:00 Introduction1:28 Scaling3:48 Topic Frequency Weigthing8:31 Topic Time Response12:09 Topic Masking Effect15:32 Topic Level of Detail17:23 Time ResolutionMeet us:www.head-acoustics.com
How We Hear Sounds | Voice Quality Online Seminar HEAD acoustics International 2019-11-26 | This web seminar introduces the basics of the human ear, the physics of hearing and how it impacts voice quality testing.The human sense of hearing is both fascinating and complex with many physiological and psychological aspects to consider. Understanding the psychology of human hearing is not an easy task and beyond the scope of voice quality testing today…but understanding how the human ear works from a physiological perspective has been well documented for many years.Link to Website: head-acoustics.comLink to LinkedIn: linkedin.com/company/head-acoustics-gmbhLink to Twitter: twitter.com/HEADacoustics
Speech Transmission & Intelligibility Index Metrics | Voice Quality Online Seminar HEAD acoustics International 2019-10-31 | This web seminar introduces to the basic Transmission and Intelligibility Indexes used for voice quality testing. In speech communication, many different metrics can be used to quantify ‘good’ and ‘bad’ performance. Voice is a very difficult signal to analyze and things like background noise, reverberation, echo and room acoustics can have a huge influence on how that voice is understood and interpreted. Topics to be covered include: • Introduction and overview of common metrics• The test methods and how they are applied• Relating Indexes to practical intelligibility and voice qualityLink to Website: head-acoustics.comLink to LinkedIn: linkedin.com/company/head-acoustics-gmbhLink to Twitter: twitter.com/HEADacoustics
Packetized Voice and Audio | Voice Quality Online Seminar HEAD acoustics International 2019-10-31 | This web seminar introduces to the basic packetized voice and audio measurements and how we do pay extra attention to elements like delay, clock drift, discontinuous transmission, comfort noise, network impairments and voice quality.In speech communication, we have slowly transitioned from circuit based calls (think landlines/early cell phone technology/etc.) to packet switch calls (think VoIP/VoLTE). Many of our goals remain the same: we still desire great speech AND conversational quality. But the underlying technology now requires more diligence in a few areas when tuning and testing a device.Link to Website: head-acoustics.comLink to LinkedIn: linkedin.com/company/head-acoustics-gmbhLink to Twitter: twitter.com/HEADacoustics
Noise Suppression Measurement Techniques Part 2 | Voice Quality Online Seminar HEAD acoustics International 2019-10-30 | This web seminar is part 2 of 2 that covers different noise suppression measurement techniques used in voice quality testing.As DSP technology has become more cost effective to deploy, it has become possible for communication devices to utilize this power to actively suppress background noise in voice calls. This has improved the quality of voice calls significantly in recent years provided the noise suppression techniques only reduce noise and not affect the voice. Quantifying how much noise suppression has been applied and evaluating its impact on voice quality is important to ensure that the voice call is indeed better with noise suppression, not worse.This web seminar will cover topics including:• Evaluating noise suppression using 3QUEST• What are the differences between ETSI ES 202 396-3 and ETSI TS 103 106• Background Noise Transmission (BGNT) techniquesLink to Website: head-acoustics.comLink to LinkedIn: linkedin.com/company/head-acoustics-gmbhLink to Twitter: twitter.com/HEADacoustics
Noise Suppression Measurement Techniques: Part 1 | Voice Quality Online Seminar HEAD acoustics International 2019-10-30 | External links:ITU-T G.160: https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=11653This web seminar introduces to different noise suppression measurement techniques used in voice quality testing.As DSP technology has become more cost effective to deploy, it has become possible for communication devices to utilize this power to actively suppress background noise in voice calls. This has improved the quality of voice calls significantly in recent years provided the noise suppression techniques only reduce noise and not affect the voice. Quantifying how much noise suppression has been applied and evaluating its impact on voice quality is important to ensure that the voice call is indeed better with noise suppression, not worse.Since there are many noise suppression methods used in voice quality testing, this web seminar has been divided up in to 2 sessions. Session 1 will cover:• Why is Noise Suppression Important?• Using single value calculations to quantify noise suppression: D Value, Acoustic Noise Rejection (ANR), and SNRi (Signal to Noise Ratio Improvement per ITU G.160)Link to Website: head-acoustics.comLink to LinkedIn: linkedin.com/company/head-acoustics-gmbhLink to Twitter: twitter.com/HEADacoustics
Echo Testing: Basic to Advanced | Voice Quality Online Seminar HEAD acoustics International 2019-10-30 | In this web seminar attendees will learn about the different echo metrics that are used in voice quality testing.Echo has been identified since the beginning of voice communications as one of the most annoying impairments that users can encounter. Nothing can end a phone call faster than persistent echo! Since echo is such a nuisance, there are many different ways to characterize echo and understand how an echo canceller is performing.Topics to be covered by this webinar on echo testing methods include:• What is echo?• How does delay affect echo?• Review of different metrics (basic to advanced) used to characterize echoLink to Website: head-acoustics.comLink to LinkedIn: linkedin.com/company/head-acoustics-gmbhLink to Twitter: twitter.com/HEADacoustics
Mean Opinion Scores (MOS) | Voice Quality Online Seminar HEAD acoustics International 2019-10-30 | External links:ITU-T P.862: https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=5374What are Mean Opinion Scores (MOS)? What is the difference between subjective and objective MOS? This web seminar introduces to commonly used MOS metrics in modern voice quality testing.One of the main goals of many voice quality test programs is to come up with a single, easy to interpret metric that can provide information about how ‘good’ or ‘bad’ a voice signal. As discussed in previous web seminars, it is not easy to objectively quantify voice; therefore, many other metrics have been introduced that try to analyze specific voice quality attributes. In recent years both technology and methodologies have been introduced that can now calculate such a single metric which is referred to as a Mean Opinion Score, more commonly referred to as a MOS. Link to Website: head-acoustics.comLink to LinkedIn: linkedin.com/company/head-acoustics-gmbhLink to Twitter: twitter.com/HEADacoustics
Double Talk Testing | Voice Quality Online Seminar HEAD acoustics International 2019-10-16 | What is double talk? Why is double talk an important metric for voice quality testing? This web seminar introduced to double talk analysis techniques and how to deploy them.In a normal, live conversation between individuals it is natural that some double talk occurs. In voice communication systems ensuring that double talk can seamlessly occur is a very difficult thing to do. Processing issues such as delay, device response time, voice activity detection (VAD), and many others can make real-time two way communication almost impossible.Link to Website: http://www.head-acoustics.comLink to LinkedIn: http://www.linkedin.com/company/head-acoustics-gmbhLink to Twitter: http://www.twitter.com/HEADacoustics
New NVH measurement equipment by HEAD acoustics HEAD acoustics International 2019-08-29 | See the many new hardware and software solutions for NVH testing from HEAD acoustics.Visit our booth at the Automotive Testing Expo. Take the opportunity to get to know many new products from HEAD acoustics and have them demonstrated.HEAD acoustics will focus on the following topics this year:• SQobold• SQuadriga III• Modal Analysis• Sound Intensity• Sound Power Measurements according to different DIN Standards
Fastest Sound Camera Analysis – Brake squeal on bicycle HEAD acoustics International 2019-08-01 | Analyzing noise events is incredible fast using a professional sound camera or acoustic camera like the HEAD VISOR system. 10 seconds recording time of a bicycle break squeal is enough to detect and analyze all noise sources on the test object in just one minute.The slip stick effect causes the vibration. But which parts get in resonance and radiate the tonal noises. Find out…Deutsche Version:youtu.be/PJ4-GTCH38Y
