Uploaded November 2020 | Updated September 2026, 3 days ago
For us, who likes to point out and debunk Flat Earth stupidity: after a while, we notice a pattern. That is repeat and rehashing of the same thing that has been debunked over and over again.
But once in a while, something new would come around; and that would get passed on between all the Flat Earther channels. Today we look at such a video. Now this might also be an old egg, but it is new to me: and it is to do with “Sonar”. Yes, you heard me right: sonar.
You might be thinking what does sonar have to do with Flat Earth? Well, fear not. I believe it was “Taboo Conspiracy” who first released this video titled “No Acoustic Globe Shadow? The Sonar Proof of the Flat Earth”. Lets have a look, shall we?
It is a long video, as we will be covering a lot on sonar; video is timestamped - so please feel free to jump to actual debunking. Enjoy.
PS: I have been told that the original is a Globebusters video; my bad.
Resources:
----------------------------------------------------------------------------------------------
oceanservice.noaa.gov/facts/sonar.html
fas.org/spp/eprint/snf03222.htm
fas.org/man/dod-101/navy/docs/es310/SNR_PROP/snr_prop.htm
sciencedirect.com/topics/earth-and-planetary-sciences/sonar
deepersonar.com/us/en_us/how-it-works/how-sonars-work
sciencedirect.com/topics/medicine-and-dentistry/acoustic-shadow
punaridge.org/doc/factoids/DigitalData/Default.htm
fas.org/irp/program/collect/sosus.htm
britannica.com/technology/sonar
Original video:
----------------------------------------------------------------------------------------------
youtube.com/watch?v=94i2M9tluLw
=============================
Table of contents
=============================
0:00 - Introduction
1:30 - Premise
2:32 - My question for Flat earthers
3:36 - Sonar and Flat Earth
4:30 - Basic understanding of Sonar Technology
7:26 - Active Sonar System
8:33 - Passive Sonar System
9:37 - Frequency and Mounting
12:10 - Clarification of Sonar
13:55 - Sonar propagation
14:28 - Spherical and Cylindrical spreading
16:00 - Propagation and gradient
17:51 - Detection Range
19:50 - Actual debunking: Ocean, depth and pressure
21:50 - Acoustic shadow
22:35 - “Sound Surveillance System” or SOSUS
26:31 - Sound does not need direct line of sight
For us, who likes to point out and debunk Flat Earth stupidity: after a while, we notice a pattern. That is repeat and rehashing of the same thing that has been debunked over and over again.
But once in a while, something new would come around; and that would get passed on between all the Flat Earther channels. Today we look at such a video. Now this might also be an old egg, but it is new to me: and it is to do with “Sonar”. Yes, you heard me right: sonar.
You might be thinking what does sonar have to do with Flat Earth? Well, fear not. I believe it was “Taboo Conspiracy” who first released this video titled “No Acoustic Globe Shadow? The Sonar Proof of the Flat Earth”. Lets have a look, shall we?
It is a long video, as we will be covering a lot on sonar; video is timestamped - so please feel free to jump to actual debunking. Enjoy.
PS: I have been told that the original is a Globebusters video; my bad.
Resources:
----------------------------------------------------------------------------------------------
oceanservice.noaa.gov/facts/sonar.html
fas.org/spp/eprint/snf03222.htm
fas.org/man/dod-101/navy/docs/es310/SNR_PROP/snr_prop.htm
sciencedirect.com/topics/earth-and-planetary-sciences/sonar
deepersonar.com/us/en_us/how-it-works/how-sonars-work
sciencedirect.com/topics/medicine-and-dentistry/acoustic-shadow
punaridge.org/doc/factoids/DigitalData/Default.htm
fas.org/irp/program/collect/sosus.htm
britannica.com/technology/sonar
Original video:
----------------------------------------------------------------------------------------------
youtube.com/watch?v=94i2M9tluLw
=============================
Table of contents
=============================
0:00 - Introduction
1:30 - Premise
2:32 - My question for Flat earthers
3:36 - Sonar and Flat Earth
4:30 - Basic understanding of Sonar Technology
7:26 - Active Sonar System
8:33 - Passive Sonar System
9:37 - Frequency and Mounting
12:10 - Clarification of Sonar
13:55 - Sonar propagation
14:28 - Spherical and Cylindrical spreading
16:00 - Propagation and gradient
17:51 - Detection Range
19:50 - Actual debunking: Ocean, depth and pressure
21:50 - Acoustic shadow
22:35 - “Sound Surveillance System” or SOSUS
26:31 - Sound does not need direct line of sight
