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**Unformatted text preview: **16.33: = v f = ( 344 m s ) ( 688 Hz ) = 0.500 m To move from constructive interference to destructive interference, the path difference must change by 2. If you move a distance x toward speaker B, the distance to B gets shorter by x and the difference to A gets longer by x so the path difference changes by 2x. 2 x = 2 and x = 4 = 0.125 m ...

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