Please help me with finding Sound "I havequiztomorrow.?
Assume that the speed of sound in air is 343 m/s, at 20C,unlessotherwise noted.
2. You are listening to an outdoor concert on a day whenthetemperature is 0C. The sound of a wavelength of .490 m isemittedby a flute on the stage 125 m from where you arestanding.
a) What is the time elapsed before you hear the sound emittedfromthe stage?
b) What is the frequency of the sound?
3. The engine of a jet plane taking off produces a sound levelof140 dB, and the sound wave has a pressure amplitude of 200 Pa.Abaggage handler working next to a jet plane that is taking offiswaring specially designed hearing protectors that reduce thesoundlevel entering his ear by 40 dB. What is the pressureamplitude ofthe sound wave entering his ear?
**Please show your work, so I can understand how to do this inthefuture.
Please answer 1 or both...
1
answer
0
watching
97
views
10 Nov 2019
If a "crack" produces a sound with an intensity level of 56 dB at your ear, which is 18 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.
If a "crack" produces a sound with an intensity level of 56 dB at your ear, which is 18 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.
Irving HeathcoteLv2
16 Jan 2019