Sound and Vibration Instrument Hire and Calibration

GRAS 41AL Outdoor Microphone Specifications

GRAS 41AL : Outdoor Measurement Microphone System - type 1	£ 8 a day *

Sensitivity :

50mV/Pa, individually calibrated

Frequency Response :

IEC 651 type 1
20 Hz to 80 Hz       ± 1 dB
80 Hz to 4 kHz       ± 0.7 dB
  4 kHz to 8 kHz     ± 1 dB
  8 kHz to 12 kHz   + 2 dB, - 3 dB
12 kHz to 20 kHz   + 3dB, -infinity

Dynamic Range, upper limit :

> 156 dB SPL

Noise Floor :

A-weighted : 17 dB
Linear, 23 Hz to 22 kHz : 20 dB

Output Impedance :

55 Ω typically

Output Current :

> 1 mA

Power Supply :

Preamplifier : 120 V
Polarisation : 100 V

Power Consumption :

2.3 mA at 120 V

Temperature Range :

- 40 to + 50 °C

Dimensions and Weight :

Diameter : 29 mm : 1.14 inches casing diameter
Length : 280 mm : 11 inches
Weight : 200 g : 0.44 lb
E&OE - specifications subject to change without notice.
* Our standard hire charges are based on a 4-day minimum period, details other options.