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In episode 99, the Chimera Ant bat says, "Water significantly weakens the power of sound!"

"Water significantly weakens the power of sound!"

But water is a good conductor of sound. Why does she say this?

  • I would guess this is a result of the writer(s) noticing that humans cannot hear well while underwater, and equating that with poor sound transmission. (Our inability to hear underwater is actually unrelated to transmission quality.) – Killua Aug 19 '15 at 2:26
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    There is some physics to support to this so maybe asking this on the Physics stack exchange could help? I know it has something to do with the frequency changing when it hits the water but I cant remember whole reason. – SWard Aug 19 '15 at 2:55
  • Am I correct that she is attempting to hit something under the water from above it? – kaine Aug 19 '15 at 15:53
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She probably says this because water weakens the effect of the technique, secret sound, that Bat.

Bat enhances her voice and produces a powerful sound wave infused with her nen that confuses and disorientates her enemies leaving them without guard for some seconds

In this scene, Gon rips a bit of his trouser pocket before making them damp with saliva and stuffing them in his ears, effectively making earplugs for himself.

Practically speaking, fabric itself doesn't make good earplugs, but by dampening it, it works quite well.

If Bat's sound waves cannot be heard as well, it won't have the same effect. Therefore it is weaker.

It's important to note that the original phrase was: 水は音波のエネルギーを著しく弱める

Which can be translated, taking in context, to: Water significantly weakens the energy of the sound wave.

Therefore it could be her referring to how water is weakening the effect of her technique, instead of sound in general.

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Because water is more dense than the air, the sound does travel faster through water, i think about 4 times faster than air! but because water is dense it also needs more energy to moves the water particles ! which is why you can hear a faint sound in air but in water it doesn't even start, so you can't hear anything
in the end what you read in the link you mentioned is a talk about sound speed, which is indeed faster in water, and even faster in metal ! but there are variables such as initial energy needed for moving the particles, so you can hear
This site too, explains about sound travel under water
http://indianapublicmedia.org/amomentofscience/how-sound-travels-under-water/

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    Welcome to Anime & Manga! Rather than just saying 'it's basic physics', could you provide some proof in your answer? Short answers are often marked as needing additional citation. – Matt Aug 19 '15 at 11:48

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