3 ms·

Seems like very misleading science reporting. It relies on the wow factor of a 12mm fish producing a sound as loud as what many people would associate with a je

Seems like very misleading science reporting. It relies on the wow factor of a 12mm fish producing a sound as loud as what many people would associate with a jet engine (>140db). - Sound levels are usually assumed to be measured 1m away. For the fish, it’s measured one body length away (inverse square law applies) - Jet engines are often measured from many meters away (again inverse square law) - The fish’s sound is pulsed and lasts only 2.5ms, while jet engine noise is continuous. - The frequency emitted by the fish “exceeds 20kHz”. The frequency range of a jet engine spans almost the entire range of human hearing. - Standing next to one might startle you a bit, the other will irreversibly damage you.

HPsquared 3y ago
Also it's underwater. I bet if someone tried to fire a gun underwater, the pressure wave (sound) would be louder than usual.
- xoxxala 3y ago
  The sound wouldn’t be noticeably louder at the source, but would travel faster (sound travels 4x faster in water than in air) and farther.
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NoPicklez 3y ago
I don't think so and I don't see any mention of it being compared to a jet engine. The article compares it to a sledgehammer, ambulance siren or a gunshot. A gunshot of which is not a continuous sound. Regardless, it is impressive that a 12mm fish can produce such a loud sound regardless of whether it is continuous and/or throughout our frequency range of hearing.
- reaperman 3y ago
  It really does matter how far away the sound measurement is taken. 12mm vs. 1000mm away is not trivial for this "decibel" number to make any sense, contextually. 140dB at 12mm is equivalent to 100db at 1000mm. So that's 20dB less than an "ambulance" or "jackhammer" as listed here[0]. Which definitely would make the article misleading. 0: https://noiseawareness.org/info-center/common-noise-levels/ https://noiseawareness.org/info-center/common-noise-levels/
  - cassac 3y ago
    You are right, 100db is only like a motorcycle. As loud as a motorcycle but only 12mm? Not Impressed! Get it together little fish!
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HPsquared 3y ago

Also it's underwater. I bet if someone tried to fire a gun underwater, the pressure wave (sound) would be louder than usual.

xoxxala 3y ago
The sound wouldn’t be noticeably louder at the source, but would travel faster (sound travels 4x faster in water than in air) and farther.

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NoPicklez 3y ago

I don't think so and I don't see any mention of it being compared to a jet engine. The article compares it to a sledgehammer, ambulance siren or a gunshot. A gunshot of which is not a continuous sound. Regardless, it is impressive that a 12mm fish can produce such a loud sound regardless of whether it is continuous and/or throughout our frequency range of hearing.

reaperman 3y ago
It really does matter how far away the sound measurement is taken. 12mm vs. 1000mm away is not trivial for this "decibel" number to make any sense, contextually. 140dB at 12mm is equivalent to 100db at 1000mm. So that's 20dB less than an "ambulance" or "jackhammer" as listed here[0]. Which definitely would make the article misleading. 0: https://noiseawareness.org/info-center/common-noise-levels/ https://noiseawareness.org/info-center/common-noise-levels/
- cassac 3y ago
  You are right, 100db is only like a motorcycle. As loud as a motorcycle but only 12mm? Not Impressed! Get it together little fish!
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