For the following exercises, solve for the indicated value, and graph the situation showing the solution point. The formula for measuring sound intensity in decibels D is defined by the equation D = 10 log ( I I 0 ) , where I is the intensity of the sound in watts per square meter and I 0 = 10 − 12 is the lowest level of sound that the average person can hear. How many decibels are emitted from a jet plane with a sound intensity of 8.3 ⋅ 10 2 watts per square meter?
For the following exercises, solve for the indicated value, and graph the situation showing the solution point. The formula for measuring sound intensity in decibels D is defined by the equation D = 10 log ( I I 0 ) , where I is the intensity of the sound in watts per square meter and I 0 = 10 − 12 is the lowest level of sound that the average person can hear. How many decibels are emitted from a jet plane with a sound intensity of 8.3 ⋅ 10 2 watts per square meter?
For the following exercises, solve for the indicated value, and graph the situation showing the solution point.
The formula for measuring sound intensity in decibels D is defined by the equation
D
=
10
log
(
I
I
0
)
,
where I is the intensity of the sound in watts per square meter and
I
0
=
10
−
12
is the lowest level of sound that the average person can hear. How many decibels are emitted from a jet plane with a sound intensity of
8.3
⋅
10
2
watts per square meter?
The range of sound intensities that the human ear can detect is so large that a special decibel scale (named after Alexander Graham Bell) is used to measure and compare sound intensities. The
decibel level (dB) is given by
log()
dB(I) = 10 log(
where Io is the intensity of sound that is barely audible to the human ear. Use the decibel level formula to find the decibel level for the following sounds. Round to the nearest tenth of a decibel.
(a) Automobile traffic, I = 1.58 x 108. Io
dB
(b) Quiet conversation,
dB
I =
(d) Jet engine,
dB
= 10,800. Io
(c) Fender guitar, I = 3.16 x 10¹1. Io
dB
I = 1.58 × 10¹5. Io
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