3 ms·

“Pretty loud” is an understatement because decibel is a logarithmic scale - every 6dB increase is an apparent doubling of loudness. Also, no-one can hear 1hz -

“Pretty loud” is an understatement because decibel is a logarithmic scale - every 6dB increase is an apparent doubling of loudness. Also, no-one can hear 1hz - for us it’s a rhythm, not a tone. A grandfather clock ticks at roughly that rate, as a matter of fact (well, twice that rate if you count both the “tick” and the “tock”.

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lucb1e 4y ago
3 dB difference is a doubling/halving of amplitude. Not sure if that's what you meant with apparent loudness?
- ravel-bar-foo 4y ago
  Energy of a wave is proportional to the square of amplitude, so I guess they took the square of the doubled amplitude in dB.
- taejavu 4y ago
  I mean how loud it sounds, the subjective “volume”. It’s not exact, but it’s a useful rule of thumb.
Maursault 4y ago
> Also, no-one can hear 1hz True, except for those cursed with subsonic hearing that can hear frequencies below 8Hz down to sub Hz frequencies, and which is painful for them even at low sound pressures and from great distances, bizarre because these waves can be over 34,000x the diameter of the human ear drum.
- taejavu 4y ago
  Like who? I’ve never heard of this and am struggling to find any supporting material for your claims. Are you able to provide any?
  - Maursault 4y ago
    The human range of hearing is only generally stated at between 20-20k Hz. Do you really believe that is a hard limit? Is it really so difficult to believe there are outliers? It is far more common to find individuals with supersonic hearing that can hear sounds above 20kHz, called ultrasonics, some that can even hear frequencies as high as 28kHz and higher. But even most people can hear sounds as low as 12Hz under ideal laboratory conditions. But frequencies much lower can be heard by a minority of individuals.[1][2] I have no trouble whatsoever hearing this[3] or this[4], though it... hurts. Diesel school busses are the bane of my existence, putting out frequencies between 5-8Hz that I can hear passing from 10 miles away from inside my house. If they're within half a mile, it kills me. There's no escape from it, plugging ears does nothing. You'll never, never ever see a black hole or dark matter, but I bet you have no trouble believing in them. But you're skeptical of subsonic hearing because Google sucks. Take my word for it, and be skeptical of Google instead. [1] https://docs.wind-watch.org/OudM_journalGeluid_2013_03_EN.pdf https://docs.wind-watch.org/OudM_journalGeluid_2013_03_EN.pd... [2] https://pubmed.ncbi.nlm.nih.gov/15273023/ https://pubmed.ncbi.nlm.nih.gov/15273023/ [3] https://www.youtube.com/watch?v=kEPswjA5-m0&t=0m4s https://www.youtube.com/watch?v=kEPswjA5-m0&t=0m4s [4] https://www.youtube.com/watch?v=XV11rd-sJdg&t=0m4s https://www.youtube.com/watch?v=XV11rd-sJdg&t=0m4s
    - taejavu 4y ago
      Hate to break it to you but everyone can hear those videos, they're not what they say they are. I downloaded the audio of the one that claims to be 1Hz and analysed it - most of the energy is between 40 and 60Hz, with some as high as 100Hz. I've uploaded a screenshot so you can see for yourself: https://i.imgur.com/GSpa8ZJ.png https://i.imgur.com/GSpa8ZJ.png The thing is, I didn't have to listen to the video to know it's BS, because I know there's no consumer audio equipment (speakers _or_ headphones) that will reproduce tones lower than 20Hz. As a matter of fact you'd be hard-pressed to find a subwoofer that will even do 25Hz. Go ahead, prove me wrong. Note that I'm not trying to disprove or diminish your claims of what you personally experience. But I'm also not going to "take your word for it". I find it very hard to imagine what 1Hz "sounds" like, and so far nothing you've provided makes that gap any easier to bridge.

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lucb1e 4y ago

3 dB difference is a doubling/halving of amplitude. Not sure if that's what you meant with apparent loudness?

ravel-bar-foo 4y ago
Energy of a wave is proportional to the square of amplitude, so I guess they took the square of the doubled amplitude in dB.
taejavu 4y ago
I mean how loud it sounds, the subjective “volume”. It’s not exact, but it’s a useful rule of thumb.

Maursault 4y ago

> Also, no-one can hear 1hz True, except for those cursed with subsonic hearing that can hear frequencies below 8Hz down to sub Hz frequencies, and which is painful for them even at low sound pressures and from great distances, bizarre because these waves can be over 34,000x the diameter of the human ear drum.

taejavu 4y ago
Like who? I’ve never heard of this and am struggling to find any supporting material for your claims. Are you able to provide any?
- Maursault 4y ago
  The human range of hearing is only generally stated at between 20-20k Hz. Do you really believe that is a hard limit? Is it really so difficult to believe there are outliers? It is far more common to find individuals with supersonic hearing that can hear sounds above 20kHz, called ultrasonics, some that can even hear frequencies as high as 28kHz and higher. But even most people can hear sounds as low as 12Hz under ideal laboratory conditions. But frequencies much lower can be heard by a minority of individuals.[1][2] I have no trouble whatsoever hearing this[3] or this[4], though it... hurts. Diesel school busses are the bane of my existence, putting out frequencies between 5-8Hz that I can hear passing from 10 miles away from inside my house. If they're within half a mile, it kills me. There's no escape from it, plugging ears does nothing. You'll never, never ever see a black hole or dark matter, but I bet you have no trouble believing in them. But you're skeptical of subsonic hearing because Google sucks. Take my word for it, and be skeptical of Google instead. [1] https://docs.wind-watch.org/OudM_journalGeluid_2013_03_EN.pdf https://docs.wind-watch.org/OudM_journalGeluid_2013_03_EN.pd... [2] https://pubmed.ncbi.nlm.nih.gov/15273023/ https://pubmed.ncbi.nlm.nih.gov/15273023/ [3] https://www.youtube.com/watch?v=kEPswjA5-m0&t=0m4s https://www.youtube.com/watch?v=kEPswjA5-m0&t=0m4s [4] https://www.youtube.com/watch?v=XV11rd-sJdg&t=0m4s https://www.youtube.com/watch?v=XV11rd-sJdg&t=0m4s
  - taejavu 4y ago
    Hate to break it to you but everyone can hear those videos, they're not what they say they are. I downloaded the audio of the one that claims to be 1Hz and analysed it - most of the energy is between 40 and 60Hz, with some as high as 100Hz. I've uploaded a screenshot so you can see for yourself: https://i.imgur.com/GSpa8ZJ.png https://i.imgur.com/GSpa8ZJ.png The thing is, I didn't have to listen to the video to know it's BS, because I know there's no consumer audio equipment (speakers _or_ headphones) that will reproduce tones lower than 20Hz. As a matter of fact you'd be hard-pressed to find a subwoofer that will even do 25Hz. Go ahead, prove me wrong. Note that I'm not trying to disprove or diminish your claims of what you personally experience. But I'm also not going to "take your word for it". I find it very hard to imagine what 1Hz "sounds" like, and so far nothing you've provided makes that gap any easier to bridge.