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.. There was this French bloke at the turn of the 20th century who built a giant whistle that produced sub-bass frequencies of around 7.1 or 7.2 Hz. The first t

by thro1 4y ago

.. There was this French bloke at the turn of the 20th century who built a giant whistle that produced sub-bass frequencies of around 7.1 or 7.2 Hz. The first time that he got it to work, he liquidized himself. It just turned his insides to mush—poor bugger. https://djtechtools.com/2014/04/10/funktion-ones-tony-andrews-on-setting-up-soundsystems-from-wembley-stadium-to-your-bedroom/ https://djtechtools.com/2014/04/10/funktion-ones-tony-andrew... Someone knows more about it ?

yellowapple 4y ago
Maybe Vladimir Gavreau? https://en.wikipedia.org/wiki/Vladimir_Gavreau https://en.wikipedia.org/wiki/Vladimir_Gavreau EDIT: who may or may not be the same as this "Professor Gavraud": https://www.dickbowdler.co.uk/content/publications/A_Short_History_of_the_Dangers_of_Infrasound.pdf https://www.dickbowdler.co.uk/content/publications/A_Short_H...
- deleted 4y ago
  [deleted]
- soared 4y ago
  Those are incredibly interesting reads, thank you!
  - iancmceachern 4y ago
    Yeah, this is good stuff. The device could kill a person at 5 miles away, but was just as dangerous to its operators as to its enemy. It could deliver tens of thousands of watts. Wow.
    - 6stringmerc 4y ago
      Perfect doomsday MAD device for something important but automated
dylan604 4y ago
So is that the official frequency of the brown note?
- iancmceachern 4y ago
  From looking at the patents I think it's less about a specific frequency and more about a power level. Infrasonics are defined as less than 20hz and higher than geologic vibrations like once ever hundred seconds or so. If I'd guess it's somewhere between .5 and 10 hz, but again it's not about playing something of that frequency, it's about delivering tens of thousands of watts to the air which just happens to be at that frequency
  - dylan604 4y ago
    "who built a giant whistle that produced sub-bass frequencies of around 7.1 or 7.2 Hz. The first time that he got it to work, he liquidized himself" specifically talking about frequencies liquefying someone. the quoted comment mentioned nothing about power levels. the TFA is talking about power levels. that's a different conversation than the one you replied
    - iancmceachern 4y ago
      That's my point, it's not the frequency that liquifys someone. You could easily play a 7.1 hz sound on a good thx sub or concert sound system. Simply playing that tone would not liquefy someone. At the same time, one could play a 6 hz or a 7.3 hz tone at the same power level as this guy did, and it would liquefy someone. The frequency is the result of a bunch of other variables that are the true drivers of the phenomenon. Power level, physical properties of air and the limits to the power you can couple to it before cavitation and negative pressure regions occurs, resonance, and the geometry of your device. Put that all together, get it ringing, constructively interfering, and it will be at a certain frequency. It's the result of the equation, not the input.
- deleted 4y ago
  [deleted]
- 4y ago

by thro1 4y ago

yellowapple 4y ago

Maybe Vladimir Gavreau? https://en.wikipedia.org/wiki/Vladimir_Gavreau https://en.wikipedia.org/wiki/Vladimir_Gavreau EDIT: who may or may not be the same as this "Professor Gavraud": https://www.dickbowdler.co.uk/content/publications/A_Short_History_of_the_Dangers_of_Infrasound.pdf https://www.dickbowdler.co.uk/content/publications/A_Short_H...

deleted 4y ago
[deleted]
soared 4y ago
Those are incredibly interesting reads, thank you!
- iancmceachern 4y ago
  Yeah, this is good stuff. The device could kill a person at 5 miles away, but was just as dangerous to its operators as to its enemy. It could deliver tens of thousands of watts. Wow.
  - 6stringmerc 4y ago
    Perfect doomsday MAD device for something important but automated

dylan604 4y ago

So is that the official frequency of the brown note?

iancmceachern 4y ago
From looking at the patents I think it's less about a specific frequency and more about a power level. Infrasonics are defined as less than 20hz and higher than geologic vibrations like once ever hundred seconds or so. If I'd guess it's somewhere between .5 and 10 hz, but again it's not about playing something of that frequency, it's about delivering tens of thousands of watts to the air which just happens to be at that frequency
- dylan604 4y ago
  "who built a giant whistle that produced sub-bass frequencies of around 7.1 or 7.2 Hz. The first time that he got it to work, he liquidized himself" specifically talking about frequencies liquefying someone. the quoted comment mentioned nothing about power levels. the TFA is talking about power levels. that's a different conversation than the one you replied
  - iancmceachern 4y ago
    That's my point, it's not the frequency that liquifys someone. You could easily play a 7.1 hz sound on a good thx sub or concert sound system. Simply playing that tone would not liquefy someone. At the same time, one could play a 6 hz or a 7.3 hz tone at the same power level as this guy did, and it would liquefy someone. The frequency is the result of a bunch of other variables that are the true drivers of the phenomenon. Power level, physical properties of air and the limits to the power you can couple to it before cavitation and negative pressure regions occurs, resonance, and the geometry of your device. Put that all together, get it ringing, constructively interfering, and it will be at a certain frequency. It's the result of the equation, not the input.
deleted 4y ago
[deleted]
4y ago