At a painfully loud concert, a 120-dB sound wave travels away from a loudspeaker at 343 m/s. How much sound wave energy is contained i

Question

At a painfully loud concert, a 120-dB sound wave travels away from a loudspeaker at 343 m/s.
How much sound wave energy is contained in each 1.0-cm^3 volume of air in the region near this loudspeaker?

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Nem 3 years 2021-07-25T22:54:55+00:00 1 Answers 24 views 0

Answers ( )

  1. kimchi2
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    2021-07-25T22:55:55+00:00
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    Answer:

    2.9*10^-9 J

    Explanation:

    Given that sound level is B= 120dB

    And B=10log(Io/I)

    And I = (10^12)Io

    So I = 1W/m²

    So to find Energy

    ∆E= I∆V/v

    Where ∆V= 1*10-6m³

    v = 343

    So ∆E=2.9*10^-9 J after substituting the values

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