DPA 4099B - On-Axis Frequency Response; Proximity Effect; SERVICE & REPAIR

22
10
-10
0
-20
20 Hz 50 100 200 500 1 kHz2 5102040
0˚
30˚
60˚
90˚
180˚
dB
On-Axis Frequency Response
Measured at 20 cm (7.9 in) distance
10
-10
0
-20
20 Hz 50 100 200 500 1 kHz2 5102040
10 cm
15 cm
20 cm
30 cm
100 cm
dB
The Proximity Effect
The proximity effect exhibited by DPA 4099
SERVICE & REPAIR
Products from DPA Microphones are extremely stable and there should not
be any significant change in the specifications with time and use. If, how-
ever, you are not satisfied with the characteristics exhibited by your product,
contact your nearest DPA Microphones representative for further details of
service and the repair facilities that are available.