9
5

,

11 mm (3.74 in.)
13
9,1
m
m (
5
.48 in
.)
20,3 mm (0.8 in.)20 200001000 1000050 10098765432 98765432+100–10Hz

dB

-20+20
EQ
61 cm (2 ft.) from sound source
150°
120°
150°
120°
180°
30°
60°
90°
30°
60°
0
90°
–10 dB
–20 dB
–15 dB
–5 dB
150°
120°
150°
120°
180°
30°
60°
90°
30°
60°
0
90°
–10 dB
–20 dB
–15 dB
–5 dB
500 Hz
1000 Hz
250 Hz
6300 Hz
10000 Hz
Beta 91A
21