AUDIO DATA

The decibel (abbreviated dB) is the unit used to measure the intensity of a sound.

On the decibel scale, the smallest audible sound (near total silence) is 0 dB.

A sound 10 times more powerful is 10 dB.

A sound 100 times more powerful than near total silence is 20 dB.

A sound 1,000 times more powerful than near total silence is 30 dB.

Common sounds and their decibel ratings:
Near total silence - 0 dB
A whisper - 15 dB
Normal conversation - 60 dB
A lawnmower - 90 dB
A car horn - 110 dB
A rock concert or a jet engine - 120 dB
A gunshot or firecracker - 140 dB
ATTENUATION DATA
Audio Attenuation Data - Decibel/Feet (dB/ft) loss - visit - Humidity @ 20 deg. C (68 deg. F)

FREQUENCY
0 %
5 %
10 %
20 %
40 %
60 %
80 %
100 %
100 Hz
0.0005
0.0002
0.00016
0.00016
0.00013
0.0001
0.00008
0.00007
1 kHz
0.0007
0.006
0.0035
0.0015
0.0009
0.001
0.0011
0.0012
4 kHz
0.0027
0.023
0.031
0.027
0.0085
0.0057
0.0046
0.0041
10 kHz
0.008
0.031
0.061
0.080
0.047
0.031
0.023
0.019
20 kHz
0.023
0.049
0.086
0.172
0.155
0.114
0.088
0.072
40 kHz
0.081
0.116
0.152
0.250
0.380
0.364
0.313
0.270
80 kHz
0.315
0.367
0.404
0.508
0.754
0.900
0.926
0.888
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FREQUENCY	0 %	5 %	10 %	20 %	40 %	60 %	80 %	100 %
100 Hz	0.0005	0.0002	0.00016	0.00016	0.00013	0.0001	0.00008	0.00007
1 kHz	0.0007	0.006	0.0035	0.0015	0.0009	0.001	0.0011	0.0012
4 kHz	0.0027	0.023	0.031	0.027	0.0085	0.0057	0.0046	0.0041
10 kHz	0.008	0.031	0.061	0.080	0.047	0.031	0.023	0.019
20 kHz	0.023	0.049	0.086	0.172	0.155	0.114	0.088	0.072
40 kHz	0.081	0.116	0.152	0.250	0.380	0.364	0.313	0.270
80 kHz	0.315	0.367	0.404	0.508	0.754	0.900	0.926	0.888