Short Answer
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1.
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What
kind of wave is sound, and what form do sound waves have?
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2.
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How
does sound spread through uniform medium?
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3.
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what
is the minimum intensity in watts/m2 that a sound must have in order to be
heard?
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4.
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What
is the audible frequency range of the human hearing?
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5.
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In
what units is relative intensity or noise level measured?
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6.
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Why
should people be careful to protect their eardrums against loud sounds?
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7.
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What
is the apparent frequency shift of a passing whistle or horn called, and what causes this shift in
sound?
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8.
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What
three factors affect the speed of sound in water?
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9.
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What
does the Doppler effect enable a sonar technician to do when analyzing returning sonar echoes from a
submarine?
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10.
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How
do helicopters use sonar to detect submarines?
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