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| If sound waves generate energy, is there any way to capture that energy (in places like airports, noisy cities, subways, etc) and use it as an alternate energy source?
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| Question Date: 2008-11-19 | | Answer 1:
Converting sound to electrical energy is exactly what a microphone does. Unfortunately, the amount of energy in sound is actually very small. Someone yelling at the top of their lungs only produces about 0.1 Watts. A jet takeoff at 140 dB (an extremely loud sound) only produces about 100 Watts per square meter. Even then, the jet is only near the microphone for a few seconds, not long enough to produce useful energy. | | Answer 2:
The amount of energy contained within the sound waves in such places is so small that it is of little value.
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