Two identical audio speakers connected to the same amplifier produce in-phase so

Question

Two identical audio speakers connected to the same amplifier produce in-phase sound waves with a single frequency that can be varied between 315 and 560 . The speed of sound is 340 . You find that where you are standing, you hear minimum-intensity sound.

Part A:

Explain why you hear minimum-intensity sound.

Part B:

If one of the speakers is moved 38.2 toward you, the sound you hear has maximum intensity. What is the frequency of the sound?

Part C:

How much closer to you from the position in part B must the speaker be moved to the next position where you hear maximum intensity?

Explanation / Answer

using f'=f*c/(c+/-v) v=(560-480)*340/(560+480) 26.15 m/s

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