Solution Found!
Unless indicated otherwise, assume the speed of
Chapter 16, Problem 20E(choose chapter or problem)
Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. The intensity due to a number of independent sound sources is the sum of the individual intensities. (a) When four quadruplets cry simultaneously, how many decibels greater is the sound intensity level than when a single one cries? (b) To increase the sound intensity level again by the same number of decibels as in part (a), how many more crying babies are required?
Questions & Answers
QUESTION:
Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. The intensity due to a number of independent sound sources is the sum of the individual intensities. (a) When four quadruplets cry simultaneously, how many decibels greater is the sound intensity level than when a single one cries? (b) To increase the sound intensity level again by the same number of decibels as in part (a), how many more crying babies are required?
ANSWER:Solution 20E (a).The sound level intensity as function of intensity of source is given as = 10 dB log (I/I )0 Where I = intensity of source I = intensity of sound(10 12W/m )2 0 Sound intensity level of sound if four quadruplets cry simultaneously = 10 dB log (I /I ) 0 = 10 dB log (4I/I )0 From above two equation calculat