BRUEL & KJAER 4188 - Directional Characteristics

Chapter 5 — Free-field
1
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" Microphone Type 4191
Directional Characteristics
Falcon™ Range of Microphone Products
Microphone Handbook
BE1377– 12
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5.4 Directional Characteristics
Typical directional characteristics are given in Fig.5.14 and Fig.5.15. The character-
istics are normalised relative to the 0° response.
Fig.5.13 Typical pressure-field response for the microphone
Fig.5.14 Typical directional characteristics of the microphone with Protection Grid DB3421
940871e
– 5
5
0
– 10
– 15
– 20
1 k 10 k 100 k100
Frequency (Hz)
Response (dB)
940793e
0°
330°
300°
270°
240°
210°
180°
150°
120°
60°
30°
0
5
– 5
– 10 – 15 – 20
5
0
– 5
– 10 –15 – 20
– 25
90°
0°
330°
300°
270°
240°
210°
180°
150°
120°
60°
30°
0
5
– 5
– 10 – 15 – 20
5
0
– 5
– 10 –15 – 20
– 25
90°
5 kHz
6.3 kHz
8 kHz
10 kHz
12.5 kHz
16 kHz
20 kHz
25 kHz
31.5 kHz
40 kHz
θ°