A loudspeaker mounted on a tall pole emits sound waves in all directions equally. Assume the pole is tall enough that we can neglect the effects of the ground absorbing or reflecting the sound. At a 30.0 m distance from the speaker, the sound intensity level is 80 dB.
A loudspeaker mounted on a tall pole emits sound waves in all directions equally. Assume the pole is tall enough that we can neglect the effects of the ground absorbing or reflecting the sound. At a 30.0 m distance from the speaker, the sound intensity level is 80 dB.
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Transcribed Image Text:a. What is the intensity of the sound at 30.0 m distance from the speaker ?
b. What is the power output of the speaker under these conditions?
Now consider the sound at 120.0 m distance from the speaker.
c. What is the intensity of the sound at 120.0 m distance from the speaker?
d. What is the sound intensity level at this point, in decibels?
e. How far away would you need to be to hear a sound intensity level of 40 dB?
Transcribed Image Text:A loudspeaker mounted on a tall pole emits sound waves in all directions equally. Assume the pole is tall enough
that we can neglect the effects of the ground absorbing or reflecting the sound.
At a 30.0 m distance from the speaker, the sound intensity level is 80 dB.
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