Gracey & Associates   01234 708835



Gracey Logo

Sound and Vibration Instrument Hire and Calibration

GRAS 41AL Outdoor Microphone Specifications


GRAS 41AL Outdoor Microphone
 
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.