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A person standing 1.10 m from a portable speaker hears its sound at an intensity of 4.30 x 10 -3 w/m 2 . (a) Find

  • A person standing 1.10 m from a portable speaker hears its sound at an intensity of 4.30 x 10-3 w/m2.
  •  (a) Find the corresponding decibel level.
  •  (b) Find the sound intensity (in W/m2) at a distance of 45.0 m, assuming the sound propagates as a spherical wave.
  •  (c) Find the decibel level at a distance of 45.0 m.

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