A person standing 1.05 m from a portable speaker hears its sound at an intensity of 4.30 ✕ 10−3 W/m2. (a) Find the corresponding decibel level. dB (b) Find the sound intensity (in W/m2) at a distance of 33.0 m, assuming the sound propagates as a spherical wave. W/m2 (c)Find the decibel level at a distance of 33.0 m.
A person standing 1.05 m from a portable speaker hears its sound at an intensity of 4.30 ✕ 10−3 W/m2. (a) Find the corresponding decibel level. dB (b) Find the sound intensity (in W/m2) at a distance of 33.0 m, assuming the sound propagates as a spherical wave. W/m2 (c)Find the decibel level at a distance of 33.0 m.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter14: Sound
Section: Chapter Questions
Problem 15P: A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies...
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A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.
Question
A person standing 1.05 m from a portable speaker hears its sound at an intensity of 4.30 ✕ 10−3 W/m2.
(a) Find the corresponding decibel level.
dB
(b) Find the sound intensity (in W/m2) at a distance of 33.0 m, assuming the sound propagates as a spherical wave.
W/m2
(c)Find the decibel level at a distance of 33.0 m.
dB
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