what is the whirling wind noise heard when putting your ear to a glass?
In: Physics
It is the flow of blood in your head. Put your ear to any flat surface in a quite place and you will hear it. It helps the sound reflect into your ear as well as helps it resonate making it louder. You can do this by cupping your hand up to your ear even.
Same as when you put a seashell to your ear, the resonance in the glass makes you hear the flow of the blood vessels in your ear. Xhat you can actually hear is your blood flowing in you. Pretty neat, huh ?
It is **not** the blood flowing through your ear or head. You can prove this yourself simply by pressing the cup to your head such that it seals completely; if it was the blood flow in your ear/head then the sound should continue, but you will find it almost entirely is cut off.
Instead the sound you hear is ambient noise reflecting off the interior of the cup (or shell) and jumbling together into unrecognizable white noise. Some people think this sounds similar to crashing ocean waves, a similar jumble of uncountable individual noise from millions of water droplets.
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