Question: Two identical audio speakers connected to the same amplifier produce sound waves in phase with a single frequency that can vary between 300 and 600

Two identical audio speakers connected to the same amplifier produce sound waves in phase with a single frequency that can vary between 300 and 600 Hz. The speed of sound is 340 m / s. he discovers that where he is standing, he hears a sound of minimal intensity.

a) Explain why you hear a sound of minimal intensity.

b) If one of the speakers is moved 39.8 cm towards you, the sound you hear is loudest. What is the frequency of the sound?

c) How much closer to you from the position in part (b) should the speaker be moved to the next position where you hear the minimum intensity?

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