Chapter 7 — Low-frequency Pressure-field
1
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2
" Microphone Type 4193
Frequency Response
Falcon™ Range of Microphone Products
Microphone Handbook
BE1379– 12
7
−
9
7.3.3 Actuator Response
The microphone’s frequency response is determined by adding corrections for the
type of sound field to its actuator response obtained using Electrostatic Actuator
UA0033. This is a reproducible and practical method for calibrating a microphone’s
frequency response.
If the polarization voltage is positive (as it is with Brüel&Kjær instruments), the
output voltage is negative for a positive pressure applied to the diaphragm.
Fig.7.4 Typical actuator response measured with Electrostatic Actuator UA0033
Fig.7.5 Typical actuator phase response measured with Electrostatic Actuator UA0033
940674/1e
– 5
5
0
– 10
– 15
– 20
1 k 10 k 100 k100
Frequency (Hz)
Response (dB)
940675/1e
– 90
0
– 45
– 135
– 180
1 k 10 k 100 k100
Frequency (Hz)
Response (Degrees)
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