CD1025
Hearing Science
Unit:
SOUND MEASUREMENT
Pop Quiz 3
Name:
Allison Wenger
Fill in the appropriate word or phrase
.
Note: some minimal computation is needed for some questions;
nevertheless {
this is a hint
}, you should never need more than Table 3.1).
1.
The peak amplitude is not usually the measure of the magnitude of a sound that we desire or use in routine
sound measurement. Rather, we generally us a measure that reflects its equivalent steady power. This is
called the
rootmeansquare
amplitude (no abbreviations, please
).
2.
The arithmetic basis of the decibel is a numeric transformation or “number system” known as the
logarithm
.
{The answer is NOT scientific notation
.}
3.
I somehow know the
acoustic intensity
of a certain sound.
To express this sound quantity in
intensity level
in dB
, I start off by dividing by a number like 10
12
w/m2. This number is called the:
reference
.
4.
If the measured
sound pressure
of a sound is 200 uPa, its
sound pressure
level in dB
re 20 uPa will be
20
.
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 Spring '11
 Durrant
 sound pressure level, relatively low frequency, high frequency noise, SOUND MEASUREMENT Pop, routine sound measurement

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