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A mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.

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961 views

Does the sound of the Sun oscillate around 528 Hz?

There are some people that believe that a 528Hz tone has healing properties, for instance this website and this one. One of the claims behind this frequency is, from the first source: NASA ...
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0answers
839 views

Can a 7-Hz tone kill chickens via resonance?

In the Sound function section of the Turbo C Version 2.0 Reference Guide 1988 I found the following comment. /* Emits a 7-Hz tone for 10 seconds. True story: 7 Hz is the resonant frequency of a ...
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1answer
1k views

Do active-noise cancelling headphones produce ear fatigue?

lstnsound writes in Why noise-cancellation isn't all its cracked up to be: Neat, right? Well....not exactly. Unfortunately, this technology comes with its fair share of flaws. The opposing sound ...
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2answers
801 views

Do AVS/Psychowalkman/Mind Machine devices work?

There are plenty of so called Audio-Visual-Stimulation (AVS) tools you can buy on the market (used to be called Psychowalkman). They usually claim that it can stimulate brain with sound/visualization ...
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0answers
779 views

Does the “Sono” system for noise canceling on a window work?

“Sono” is supposed to turn your window into an advanced noise canceling system that allows you to eliminate and/оr control the sounds that pass through: Gajitz writes: Created by industrial ...
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0answers
258 views

Does low frequency sound cause people to see apparitions?

There are claims like this and this that low frequency sounds can cause people to see apparitions. In certain individuals, low-frequency sound is claimed to induce feelings such as fear, dreadfulness ...
3
votes
1answer
752 views

What is the source for the supposed “sound of hell”?

I found this suspicious claim on Facebook. Apparently some "scientists" recorded sound 15km under the surface and it sounds like ...hell. https://www.youtube.com/watch?v=XSEBkmRQpG0 This is the ...
10
votes
0answers
809 views

Does “reverse sound technology” make headphones safer?

Purebuds Earphones claims that their use of "Reverse Sound Technology" makes their earbuds safer, preventing hearing damage. I searched for a scientific study of this technology, or at least a good ...
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0answers
180 views

Is the cause for the Berkeley Boom “unknown”? [closed]

Articles about the unsolved mystery of the "Berkeley Boom" claim that the loud noises that can be heard throughout Berkeley, California, and in neighbouring cities, might be caused by fireworks, cops, ...
77
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1answer
13k views

Is the world record for staying in an anechoic chamber an hour or less?

There is an anechoic chamber in Minneapolis, supposedly the "quietest place on earth", with isolated walls that absorb 99.99% of all echoes. It is claimed that the world record for staying in this ...
27
votes
1answer
4k views

Do trackers hold their ears to the ground?

There is a trope (in movies and cartoons and elsewhere) of Native American (or other) trackers are sometimes depicted as listening to the ground to presumably hear far away horses or other animals ...
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1answer
275 views

Does different sampling rate make a difference human can hear? [duplicate]

According to the Wikipedia article about sampling rates a simple CD uses a sampling rate of 44,100 Hz. Is there a notable difference (with ordinary speakers) to the sound quality if I have a bigger ...
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0answers
2k views

Is anything about the 1999 NOAA “Julia” recording prevented from publication as being classified?

The unexplained "Julia" sound is described as: Julia is a sound recorded on March 1, 1999 by the U.S. National Oceanic and Atmospheric Administration (NOAA). NOAA said the source of the sound was ...
10
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1answer
600 views

Is there any scientific explanation for this trumpet noise from the atmosphere?

According to this Daily Mail article, there have been recordings of trumpet like noises from the atmosphere. However, nobody knows the cause of it. However, as it is from the Daily Mail, I am taking ...
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0answers
244 views

Does a carpet made from wool have better acoustic properties than a synthetic carpet?

This PDF document is claiming the following: Wool carpets may have some advantages over nylon carpets in this respect, particularly for low frequency noise, as is demonstrated in Figure 1. ...
29
votes
1answer
2k views

Do falling bombs make whistling sounds?

I grew up watching movies that depict the sound of a bomb dropping overhead like this: Feeeeeeeeewwwwwwwwwww Is that for real? I have never heard a bomb dropping over my head. Just curious how it ...
56
votes
3answers
12k views

Does a -9 dB room cause hallucinations?

Does being in an anechoic chamber cause hallucinations? According to several blogs (that likely copy each other), it does. The Orfield Laboratory in Minneapolis–Saint Paul, Minnesota, United States is ...
7
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1answer
3k views

Can birds scream as loud as a jet engine?

I'm moving into an apartment with my cockatoo, and in thinking about sound level I realized I've never actually seen a source for the claim I've heard quite often and passively believed myself: ...
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1answer
8k views

Is 432Hz sound frequency more “natural” or beneficial to human body than 440Hz?

I have been reading about tuning musical instruments to A=432 frequency instead of recently (meaning in the last century) arbitrarily defined standard of tuning to A=440Hz. Supposedly the 432Hz ...
8
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0answers
391 views

Are blind listening tests flawed?

Blind listening tests are strongly critiqued by Robert Harley in this editorial, published in The Absolute Sound. Harley seems to think the tests prove nothing. Every few years, the results of some ...
49
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2answers
9k views

Is the sound from records (vinyl) superior to digital formats (CDs, music files, etc.)?

Quasi-related Are there any perceptible differences between the sound quality of 192 versus 320 kbps MP3 files? Do expensive, “premium” speaker cables actually make a difference? I've heard this ...
8
votes
1answer
547 views

Is there a Taos hum?

I have been dipping in and out of this one over the years.... Seems the hum was first brought to public attention in 1992 by Taos residents who claimed they'd been hearing it for more than a year....
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0answers
2k views

Can blocking the aperture of a mobile phone speaker cause damage?

A friend was sitting near another's ringing mobile phone, stoically ignoring the noise. When I advised him to cover the dynamic with a finger, he replied that it may break it. Is it really so? I ...
3
votes
1answer
400 views

How powerful are air cannons?

I wondered how powerful air blasters are. Is it possible for one to be so powerful that the shock wave passes through walls, floors and ceilings? Could it make bumps on metallic surfaces or at least ...
30
votes
1answer
4k views

Do car alarms provide a significant reduction in automobile theft?

Noise That movie got me thinking, because it makes a number of claims about car alarms that jive with my personal feelings about them. They're noisy, obnoxious, tend to go off at night, and are ...
97
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3answers
18k views

Are there any perceptible differences between the sound quality of 192 versus 320 kbps MP3 files?

I have friends that are very picky when it comes to MP3 bitrate, and will always look for the 320 kbps version of a file. However, I have never noticed any differences, they sound the same to me. I ...
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2answers
28k views

Do expensive, “premium” speaker cables make a difference?

I was tempted to go drop $8500 on these awesome speaker cables so I could be like Whiplash (see customer pictures), but I'm curious, if I use them for my audio system, will they actually make a ...