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rodikova [14]
3 years ago
8

When a sound wave travels directly toward a hard wall, the incoming and reflected waves can combine to produce a standing wave.

There is an antinode right at the wall, just as at the end of a closed tube, so the sound near the wall is loud. You are standing beside a brick wall listening to a 85 Hz tone from a distant loudspeaker.How far from the wall must you move to find the first quiet spot?
Physics
1 answer:
murzikaleks [220]3 years ago
3 0

Answer:

Explanation:

When standing sound wave is produced in a medium , distance between anti-node and next node is equal to a quarter of a wave length. Node is point of silence where sound intensity is zero or minima.

wave length = velocity / frequency

= 340 / 85

= 4 m

We must  move by a distance of 4/4 = 1 m away from wall

to find the first quiet spot.

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