7.
Methods
of
Calibration
Noise
Source
Type
42·40
Pistonphone
Type
4220
.........•..••.....•.......••.••••........
45
45
•.•.......................................
46
Sound
Level
Calibrator
4230
......................................
47
8.
Accessories
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.
Applications
.....................................................
57
Noise
...........................................................
58
Vibration
. . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Frequency
Response
of
4-pole
Networks
..........................
59
Tape
Recording
of
Sound
and
Vibration
Data
. . . . . . . . . . . . . . . . . . . . . . 59
Frequency
Response
and
Directivity
Pattern
of
Loudspeakers
. . . . . .
61
Satistical
Distribution
of
Sound
Levels
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
61
Sound
and
Vibration
Spectrograms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
10.
Appendix
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
11.
Specifications
...................................................
65
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