Homework Help: Physics

Posted by Amanda on Saturday, March 29, 2008 at 5:25pm.

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?

Physics - drwls, Saturday, March 29, 2008 at 6:15pm
(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.
Physics - Amanda, Saturday, March 29, 2008 at 7:42pm
Thanks alot. I had the right formula, i just didn't have I. Thanks again

Answer this Question

Related Questions

physics ..PLEASE HELP ASSIGN DUE SOON :( - A microphone has an area of 3.0cm^2. ...
Physics(Please help) - The intensity (in W/m2) of one sound is 4.83 times as ...
physics - NEED HELP WITH ONLY PART C Two 135.1.0-W speakers, A and B, are ...
algebra 2 - the loudness L of a sound in ...
physics - When I sing into a microphone, suppose I produce a sound intensity ...
physics - sound level - The source of a sound wave has a power of 2.50 µW...
physics - sound level - For two sounds whose sound levels differ by 69 dB, find ...
science - When I sing into a microphone, suppose I produce a sound intensity ...
physics - Why is an echo weaker than the original sound? 1. The echo has a ...
Physics - 1) A microphone has an area of 6.7 cm2. It receives during a 4.62 s ...

For Further Reading

First Name:
School Subject:
Answer: