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Chapter 17: Q10CQ (page 628)
What is the difference between an overtone and a harmonic? Are all harmonics overtones? Are all overtones harmonics?
All resonant frequencies higher than fundamental frequency are called overtones and the fundamental frequency along with the overtones are known as harmonics.
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What sound intensity level in dB is produced by earphones that create an intensity of \(4.00 \times {10^{ - 12}}\;{\rm{W/}}{{\rm{m}}^{\rm{2}}}\)?
How does an unamplified guitar produce sounds so much more intense than those of a plucked string held taut by a simple stick?
A sonar echo returns to a submarine \(1.20\;{\rm{s}}\) after being emitted. What is the distance to the object creating the echo? (Assume that the submarine is in the ocean, not in fresh water.)
A sound wave traveling in \(20\;{\rm{^\circ C}}\) air has pressure amplitude of\(0.5\;{\rm{Pa}}\). What is the intensity of the wave?
Show that an intensity of \({10^{ - 12}}\;{\rm{W/}}{{\rm{m}}^{\rm{2}}}\) is the same as \({10^{ - 16}}\;{\rm{W/c}}{{\rm{m}}^{\rm{2}}}\) ?
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