Use the following information for determining sound intensity. The number of decibels B of a sound with an intensity of I watts per square meter is given by B = 10 log(I/Io), where Io is an intensity of 10-12 watt per square meter, corresponding roughly to the faintest sound that can be heard by the human ear. Find the number of decibels ß of the sound. (a) I = 102 watt per m2 (jet at 30 meters) dB (b) I = 10-2 watt per m2 (siren at 30 meters) dB (c) I = 10-10 watt per m? (quiet room) dB (d) I = 100 watt per m2 (threshold of pain) dB
Use the following information for determining sound intensity. The number of decibels B of a sound with an intensity of I watts per square meter is given by B = 10 log(I/Io), where Io is an intensity of 10-12 watt per square meter, corresponding roughly to the faintest sound that can be heard by the human ear. Find the number of decibels ß of the sound. (a) I = 102 watt per m2 (jet at 30 meters) dB (b) I = 10-2 watt per m2 (siren at 30 meters) dB (c) I = 10-10 watt per m? (quiet room) dB (d) I = 100 watt per m2 (threshold of pain) dB
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Transcribed Image Text:Use the following information for determining sound intensity. The number of decibels ß of a sound with an intensity of I watts per square meter is given by B = 10 log(I/I0), where Io is an intensity of
10-12 watt per square meter, corresponding roughly to the faintest sound that can be heard by the human ear. Find the number of decibels ß of the sound.
(a)
I = 102 watt per m2 (jet at 30 meters)
dB
(b)
I = 10-2 watt per m2 (siren at 30 meters)
dB
(c)
I =
10-10
watt per m2 (quiet room)
dB
(d)
I = 100 watt per m2 (threshold of pain)
dB
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