Outdoor Microphone System - Page 20
G.R.A.S. Sound & Vibration
7.
Specifications
Valid for Types 41AM/41CN at 1013 mbar, 23 °C and 50 % RH unless stated otherwise
Nominal sensitivity:
50 mV/Pa
Frequency response:
IEC 651 Type 1 and ANSI S1.4-1983 Type 1
For the applicable reference direction as shown in Fig. 1.2, re. 1000 Hz:
20 Hz - 80 Hz:
± 1dB
80 Hz - 4 kHz:
± 0.7 dB
4 kHz - 8 kHz:
± 1 dB
8 kHz - 12.5 kHz:
± 1.5 dB
12.5 kHz - 16 kHz:
+ 1.5 dB, – 5 dB
Dynamic range (upper limit):
>156 dB SPL (at – 20 dB setting) re. 20 µPa
Total system-noise level:
A-weighted:
< 20 dB re. 20 µPa
Lin. 22.5 Hz - 22.5 kHz:
< 23 dB re. 20 µPa
Output impedance:
<50 Ω
Output current:
>25 mA
Power supply:
12 - 18 V DC
Power consumption:
120 mA at 15 V
180 mA at 15 V calibrator “on”
Operating-temperature range:
– 40 °C to + 50 °C
Calibration level of electrostatic actuator:
90 dB re. 20 µPa at 1000 Hz:
± 0.2 dB at 23 °C
Actuator temp. coefficient:
– 0.021 dB/ °C
Dimensions:
Casing (ext. dia.):
40 mm (1.57 in)
Length:
520 mm (20.5 in)
Pole-adapter thread:
50 mm (1.97 in) x G 1½ in (ISO 228/1)
Weight:
1.3 kg (2.8 lbs)
