Two speakers create identical 240 Hz sound waves. A person is 1.47 m from Speaker 1. What is the MINIMUM distance to Speaker 2 for there to

Question

Two speakers create identical 240 Hz sound waves. A person is 1.47 m from Speaker 1. What is the MINIMUM distance to Speaker 2 for there to be destructive interference at that spot? (Hint: v= lambda f=343 m/s) (Unit = m)

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Gerda 4 years 2021-09-03T19:35:58+00:00 2 Answers 45 views 0

Answers ( )

  1. Amity
    0
    2021-09-03T19:37:31+00:00
    Reply

    Answer:

    0.755

    Explanation:

  2. ngocdiep
    0
    2021-09-03T19:37:45+00:00
    Reply

    Answer: 2.90 metres

    Explanation:

    Distance of speaker 2 =?

    Distance of speaker 1 = 1.47m

    Velocity = 343

    f = 240Hz

    For constructive interference to occur:

    Difference in distance or path = wavelength

    For minimum distance, n = 1

    Distance 2 – distance 1 = nλ

    Recall λ = v/f

    V = Velocity ; f = frequency

    Distance 2 – distance 1 = v/f

    Distance 2 – 1.47 = (343/240)

    Distance 2 = 1.429 + 1.47

    Distance 2 = 2.899 meters

    Minimum Distance of speaker 2 for their to be constructive interference = 2.90meters

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