BRUEL & KJAER 4188 - Page 39

Chapter 2 — Prepolarized Free-field
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" Microphone Type 4188
Effect of Temperature
Falcon™ Range of Microphone Products
Microphone Handbook
Brüel & Kjær
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Fig.2.22 Typical variation in actuator response (normalized at
250Hz) as a function of temperature, relative to the re-
sponse at 20°C (see Fig.2.4)
Fig.2.23 Typical variation in 0°-incidence free-field response with
Protection Grid DD0525 (normalized at 250Hz) as a
function of temperature, relative to the response at 20°C
(see Fig.2.7)
940772e
Frequency (Hz)1 k 10 k 50 k
1.0
Response (dB)
– 1.5
– 1.0
– 0.5
0.0
0.5
500 Hz
1.5
– 10 °C
+ 50 °C
940806/1e
Frequency (Hz) 1 k 10 k 50 k
1.0
Response (dB)
– 1.5
– 1.0
– 0.5
0.0
0.5
500 Hz
1.5
– 10°C
50°C