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Fig. 14.
The microphone definition file
This screenshot shows a section of a microphone definition file. The following two lists
explain the details of the files for microphones and for preamplifiers.
Data in the Microphone Definition List
Identify the microphone with
1. The microphone’s type number, such as 40AB, in
Mic
2.
Name
of the microphone
3.
Type
, as in free field (F), pressure (P), random incidence (R), or other (O)
4. The name of the
Manufacturer
, such as G.R.A.S. Sound & Vibration
List the specifications
5.
Sensitivity Lower
– Lower limit of sensitivity
6.
Sensitivity Ideal
– Nominal value of sensitivity
7.
Sensitivity Higher
– Upper limit of sensitivity
8.
Sensitivity Uncertainty
– Absolute value of the sensitivity’s uncertainty
9.
Polarization
– Whether prepolarized (use 0 [V]) or externally polarized (use 200
[V])
10.
Pistonphone Level
– For example, enter 114 dB for the 42AP pistonphone
11.
Pistonphone Frequency
– For example, enter 250 Hz for the 42AP pistonphone