Cracking Your Knuckles When you "crack" a knuckle, you cause the knuckle cavity to widen rapidly. If a "crack" produces a sound with an intensity level of 57 dB at your ear, which is 17 cm from the knuckle, how far from your knuckle can the "crack" be heard? Assume the sound propagates uniformly in all directions, with no reflections or absorption.
Interference of sound
Seiche
A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.
Cracking Your Knuckles When you "crack" a knuckle, you cause the knuckle cavity to widen rapidly.
If a "crack" produces a sound with an intensity level of 57 dB at your ear, which is 17 cm from the knuckle, how far from your knuckle can the "crack" be heard? Assume the sound propagates uniformly in all directions, with no reflections or absorption.
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