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Why do we hear in a seashell "sound of the sea"?
If you bring a seashell to your ear, we hear a noise that arises from the resonance and amplification in the cavity shell external to it sounds. A similar effect can be achieved by applying the ear cup or bent palm. The human ear is very sensitive, which demonstrates the effect of resonance sounds in a seashell.
Source: mirfactov.com/
