Question: Loudspeakers A and B are vibrating in phase, producing a tone with a frequency of 2 5 0 Hz . The distance between the speakers

Loudspeakers A and B are vibrating in phase, producing a tone with a frequency of 250 Hz. The distance between the speakers and between speaker B and point C is the same, ddd. The speed of sound is 343 m/s. What is the smallest value of ddd, such that constructive interference occurs at point C?

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