Question
Posted by Anonymous on Tuesday, December 2, 2008 at 12:43am.
A loudspeaker is placed between two observers who are 114 m apart, along the line connecting them. If one observer records a sound level of 61.6 dB and the other records a sound level of 81.3 dB, how far is the speaker from each observer?
Responses
physics - drwls, Tuesday, December 2, 2008 at 2:14am
Get the intensity ratio from the decibel difference, and apply the inverse square law so that the ratio of distances squared are the inverse ratio of the intensities.
physics - HELP - Anonymous, Tuesday, December 2, 2008 at 11:17am
intensity ratio = 19.7dB
I=1/r^2
r^2 = 1/19.7
r = .225m
this doesn't make sense
what am i doing wrong?
A loudspeaker is placed between two observers who are 114 m apart, along the line connecting them. If one observer records a sound level of 61.6 dB and the other records a sound level of 81.3 dB, how far is the speaker from each observer?
Responses
physics - drwls, Tuesday, December 2, 2008 at 2:14am
Get the intensity ratio from the decibel difference, and apply the inverse square law so that the ratio of distances squared are the inverse ratio of the intensities.
physics - HELP - Anonymous, Tuesday, December 2, 2008 at 11:17am
intensity ratio = 19.7dB
I=1/r^2
r^2 = 1/19.7
r = .225m
this doesn't make sense
what am i doing wrong?