Question

A fan at a rock concert is 40.0 m from the stage, and at this point the sound intensity level is 114 dB . Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate. Typically, the diameter of this membrane is about 8.40 mm in humans.

E = 13.9  μJ  

v = 3.73  m/s  

Part C

How fast would a typical 2.0 mg mosquito would have to fly (in mm/s) in order to have a kinetic energy equal to the energy delivered to your eardrum each second when someone whispers (20 dB) a secret in your ear?

Part D

Compare the mosquito's speeds found in parts (B) and (C).

Answer 1