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Westkost [7]
2 years ago
5

How do odd-shaped ceilings, decorative panels, draperies, and glass windows affect echo and noise?

Physics
1 answer:
vesna_86 [32]2 years ago
6 0
I think they decrease echo and reduce noise, they do this by either absorbing vibrations or by scattering the sound so that echoes arrive at different times rather than reverberating as a standing wave. An echo is a reflection of a sound that arrives at the listener with a delay after the direct sound. The delay is usually proportional to the distance of the reflecting surface from the source and the listener.
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Answer:

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7 0
2 years ago
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5 0
3 years ago
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A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a sound with
beks73 [17]

Answer:

4.6 kHz

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f'=(\frac{v}{v-v_s})f

where

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And the frequency of the beats is equal to the difference between the frequency of the reflected wave and the original frequency:

f_B = |f'-f|=|45.8 kHz-41.2 kHz|=4.6 kHz

6 0
3 years ago
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Hope this helps
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