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.
HEAD acoustics International
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.
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.
updated 2 years ago
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.
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 & Overview
0:15 labRFC
1:05 labMDM
2:30 HSM V
2:48 labSMP
3:51 labRCH
3:39 labRCX
4:51 labSAR
6:26 Offline Frontends
7:18 labSPA
7:46 labMA
8:47 Outro & Link
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.
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.
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.
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
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 offers cutting edge equipment for:
- Measurement and analysis of sound and vibration
- Testing and optimization of voice and audio quality
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
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
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
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-acquisition
or get in contact with us directly for a presentation at your site.
Email to: sales@head-acoustics.com
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.com
Finally, 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.
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
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 you
Read more:
https://www.head-acoustics.com/produc...
Meet us:
head-acoustics.com
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-analysis
Links to the previous tutorials of this series:
Part 1 - Why decibels in acoustics - Acoustics Basics
youtu.be/dNso7JfnEA4
Part 2 - Handling decibel values with ease
youtu.be/7t_lKV9miI4
Part 3 - Adding - averaging decibel values
youtu.be/4LaxZebh7Ro
Meet us at:
head-acoustics.com
In 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-trainings
Or ask for your personal training offer according to your own ideas at
training@head-acoustics.com
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: 4:44
The 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/dNso7JfnEA4
Part 2 - Handling decibel values with ease
youtu.be/7t_lKV9miI4
--
Part 4 Working with decibels - Analysis Software
youtu.be/dQQnNFFlzhQ
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 Basics
youtu.be/dNso7JfnEA4
--
Part 3 - Adding - averaging decibel values
youtu.be/4LaxZebh7Ro
Part 4 Working with decibels - Analysis Software
youtu.be/dQQnNFFlzhQ
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 ease
youtu.be/7t_lKV9miI4
Part 3 - Adding - averaging decibel values
youtu.be/4LaxZebh7Ro
Part 4 Working with decibels - Analysis Software
youtu.be/dQQnNFFlzhQ
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
An 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.
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.
Learn more about the possibilities of our powerful acoustic measurement & simulation systems.
head-acoustics.com/products/playback-simulation/3pass-lab
Or simply send us your questions and applications via email:
telecom@head-acoustics.com
The one for all artificial head is the device to measure the sound quality of e.g.
Headset
Mobile phones
ANC Devices
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_gY
Part 7 - Quick guide: Modal Analysis Tutorial - youtu.be/KeR5D-YWtxI
The numerous steps from
impulse and time domain measurements
including Curve Fitting using Poly-LSCF algorithm
leading to live shapes and mode shapes
to 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.
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.pdf
Option to buy:
cdn.head-acoustics.com/fileadmin/data/en/Data-Sheets/AS/ASM_15/D51103e-ASP-103-ArtemiS-SUITE-Psychoacoustics-Advanced-Analysis.pdf
Meet us:
head-acoustics.com
ANC performance
Talk-through mode capabilities
Voice calling
In the course of this one hour session, we will:
Present our state-of-the-art test solution
Discuss where the HEAD acoustics approach differs and exceeds current practices
Share results and interpret the data from two headset test sessions
Key topics:
Present our solution coreA2BCompare coreA2B with other solutions on the market
Discuss 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
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.pdf
German Version here:
youtu.be/QzfDkkEEFZA
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.de
More information in advance:
cdn.head-acoustics.com/fileadmin/data/en/Data-Sheets/AS/ASM_15/D51003e-ASP-003-ArtemiS-SUITE-Advanced-Analysis.pdf
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
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 applications
Practical test results of real devices
Key topics
• New standardized MOS metric for listening effort
• HEAD acoustics implementation: ABLE
• Practical application
Key topics:
Acoustic end-to-end measurement setup
The principle of time-synchronous noise compensation
(TNC)Parameters that are impossible to measure without TNC
Practical examples
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 scenarios
Actual measurement results of some typical conferencing solutions
Key topics:
Measurement setup for evaluating communication quality of various components
Basic 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
This 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)
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.
In this tutorial we introduce two different analyses:
• Sound pressure level dB(A)
• Loudness sone
We 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 20:29
All analyses are presented wihtin the acoustic analysis software ArtemiS SUITE, which offers these flexible options.
German version:
youtu.be/h6sQ-iQzd-c
0:00 Introduction
1:28 Scaling
3:48 Topic Frequency Weigthing
8:31 Topic Time Response
12:09 Topic Masking Effect
15:32 Topic Level of Detail
17:23 Time Resolution
Meet us:
www.head-acoustics.com
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.com
Link to LinkedIn: linkedin.com/company/head-acoustics-gmbh
Link to Twitter: twitter.com/HEADacoustics
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 quality
Link to Website: head-acoustics.com
Link to LinkedIn: linkedin.com/company/head-acoustics-gmbh
Link to Twitter: twitter.com/HEADacoustics
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.com
Link to LinkedIn: linkedin.com/company/head-acoustics-gmbh
Link to Twitter: twitter.com/HEADacoustics
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) techniques
Link to Website: head-acoustics.com
Link to LinkedIn: linkedin.com/company/head-acoustics-gmbh
Link to Twitter: twitter.com/HEADacoustics
ITU-T G.160: https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=11653
This 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.com
Link to LinkedIn: linkedin.com/company/head-acoustics-gmbh
Link to Twitter: twitter.com/HEADacoustics
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 echo
Link to Website: head-acoustics.com
Link to LinkedIn: linkedin.com/company/head-acoustics-gmbh
Link to Twitter: twitter.com/HEADacoustics
ITU-T P.862: https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=5374
What 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.com
Link to LinkedIn: linkedin.com/company/head-acoustics-gmbh
Link to Twitter: twitter.com/HEADacoustics
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.com
Link to LinkedIn: http://www.linkedin.com/company/head-acoustics-gmbh
Link to Twitter: http://www.twitter.com/HEADacoustics
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
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