Question
The intensity due to a number of indipendent 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?
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?
Answers
(A_ Four babies have 4 times the intensity (sound power) as one baby. The decibel formula tells you the difference is 10 Log 4 = 6.02 dB.
(B) It will take another factor of four times as many babies (16 in all) to raise the sound level by another 6.02 dB.
(B) It will take another factor of four times as many babies (16 in all) to raise the sound level by another 6.02 dB.
Thanks alot. I had the right formula, i just didn't have I. Thanks again
Related Questions
a) A microphone has an area of 5cm^2. It receives during a 4.0 s time period a sound energy of 2.0*1...
The intensity (in W/m2) of one sound is 4.83 times as great as the intensity of another sound. Relat...
Sound intensity (loudness) varies inversely as the square of the distance from the source. If a rock...
The decibel level of a sound is given by the equation D=10log 10 (i/i 0), where "i" is the sound's i...