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In Science class, we are studying sound, and the question came up about sounds that make your ears bleed. But the teacher hinted that it wasn't about volume, but frequency. so, do you have any information on it?

2007-10-18 12:20:31 · 3 answers · asked by Anonymous in Science & Mathematics Biology

3 answers

To be frank, your teacher is wrong.

I can see why he (or she) would be wrong. Generally speaking, it requires a lot more energy to produce a high frequency than a low frequency. Consider x-rays which are much higher in frequency than radio waves - x-rays are so dangerous that your doctor won't stand in the same room as his machine, while radio is so relatively harmless that millions of people are constantly bathed in them.

BUT that doesn't mean lower-frequency stuff can't be dangerous... not by a long shot.

As a matter of fact, the scale that is usually used to determine if a particular sound is a danger to your hearing or not is the decibel scale. Decibels (the unit is actually the 'bel' for Alexander Graham Bell, but one bel is actually a huge unit) measure sound pressure... and if it's not pressure that explodes the most eardrums, then I don't know what is. It is certainly the unit used for occupational safety laws and the like, and NOT frequency.

For most people decibels tracks closely with the loudness of a sound, though loudness has more specifically to do with how a particular pressure sounds to an individual. But it's not even necessary to hear a sound for it to harm you or even kill you. The military was experimenting with low-frequency sound weapons for a while. A common at-home experiment is to use a drum to blow out a candle. Try it... it's kind of fun to see.

2007-10-18 13:18:15 · answer #1 · answered by Doctor Why 7 · 0 0

If the frequency vibrates your eardrums violently enough to break your eardrum, your ears can bleed from the rupture.

2007-10-18 19:36:35 · answer #2 · answered by bio rocks! 3 · 2 0

if they get brusied

2007-10-22 19:10:10 · answer #3 · answered by Anonymous · 0 0

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