- #1
bio.student24
- 11
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PLEASE HELP! Speakers and Sound--- simple problem!
Two radio speakers produce sound with a wavelength of 0.800 m. If the two speakers are separated by 1.00 m as shown in the diagram, how close to speaker A can a person stand and not hear the sound they produce?
DIAGRAM:
[A] --------d---------- person
|
|
|
where [A] and are the speakers (they are 1.00 m apart)
The answer is d=1.05m
How do i solve this problem?
i know that in order not to hear sound, it must be destructive interference, so when the wavelengths reach the person, they must be out of phase = [m + 0.5(lambda)] where m=0,1,2...
I don't know what kind of formula to use... please help! :(
Two radio speakers produce sound with a wavelength of 0.800 m. If the two speakers are separated by 1.00 m as shown in the diagram, how close to speaker A can a person stand and not hear the sound they produce?
DIAGRAM:
[A] --------d---------- person
|
|
|
where [A] and are the speakers (they are 1.00 m apart)
The answer is d=1.05m
How do i solve this problem?
i know that in order not to hear sound, it must be destructive interference, so when the wavelengths reach the person, they must be out of phase = [m + 0.5(lambda)] where m=0,1,2...
I don't know what kind of formula to use... please help! :(