- #1
lc99
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Homework Statement
b) What is the distance from speaker B to the microphone at point P?
c) What are the first 2 frequencies at which the microphone at point P would detect sound waves of maximum intensity? Give answers to 2 significant figures.
d)What are the first 2 frequencies at which the microphone at point P would detect no sound? Give answers to 2 significant figures.
e) Describe in words what would be different if the speakers were emitting sound at different intensities.
Homework Equations
The Attempt at a Solution
a) sqrt(17)
b)sqrt(20)
c) sqrt(20) - sqrt(17) = 0.349 m --> 0.349m = nlambda --> lambda = .349/1 and 0.349/2
lambda = 0.349 and lambda = 0.174
f1 = 344/0.349 =986 Hz
f2 = 344/0.174= 1977 Hz
d) 0.349 = (n+ 1/2)lambda
lambda = 0.349/1.5 and 0.349/2.5
=0.233 and 0.1396
f1 = 344/0.233 = 1476 Hz
f2=344 / 0.1396 =2464
(destructive)e) the loudness would changeI'm pretty sure I've done something wrong, but I am not sure where. The frequencies are clearly too high.