GRAS 67AX ø400 mm CCP Ground Array Microphone Kit

  •  Part Number: GRAS 67AX
     Category: GRAS Sound & Vibration
  •  View: 13
     Status: Available

  • Freq range: 3.15 Hz to 20 kHz
    Dyn range: 22 dB(A) to 150 dB
    Sensitivity: 12.5 mV/Pa

  • Sale Price: Liên hệ
  • 0903368648
    +84903368648
Product Information

The GRAS 67AX ½\" CCP Ground Array Microphone Set consists of a ½” precision pressure microphone with built-in CCP preamplifier, a ø400 mm mounting plate, and an adapter for a BNC cable.

Technology

Typical applications and use

  • Ground array measurements
  • General noise measurements
  • Ideal for the aerospace industry

Design

The 67AX is a ground array microphone kit designed for the aerospace industry, i.e. for measurement of noise from overhead aircraft.

The microphone set is designed to sit asymmetrically in the mounting to attain a more uniform frequency response for measurements.

The GRAS 47AX microphone is a IEC 61094 1/2\'\' CCP Flush-mount Microphone Set with a dynamic range from 22 dB to 150 dB and a frequency range from 3.15 Hz to 20 kHz. Its height of only 8 mm (to the diaphragm) is the ideal match for the design of the 67AX. The built-in preamplifier is a low noise constant current power (CCP) type, with a built-in TEDS circuit for automatic transducer identification.

Specifications

Polarization/Connection   0 V / CCP
Frequency range (±1 dB) Hz 5 to 12.5 k
Frequency range (±2 dB) Hz 3.15 to 20 k
Dynamic range lower limit (microphone thermal noise) dB(A) 22
Dynamic range upper limit dB 150
Dynamic range upper limit with GRAS CCP preamplifier dB 149
Set sensitivity @ 250 Hz (±2 dB) mV/Pa 12.5
Microphone venting   Rear
IEC 61094-4 Compliance   WS3P
Output impedance Ω < 50
Temperature range, operation °C / °F -30 to 70 / -22 to 158
Temperature range, storage °C / °F -40 to 85 / -40 to 185
Static pressure coefficient @250 Hz dB/kPa -0.008
Humidity range non-condensing % RH 1 to 100
Humidity coefficient @250 Hz dB/% RH < 0.1
Influence of axial vibration @1 m/s² dB re 20 µPa 66
TEDS (IEEE 1451.4)   27 v.1.0
Connector type   BNC
CE/RoHS compliant/WEEE registered   Yes/Yes/Yes
Weight g / oz 15 / 0.529

Placement of the microphone in the plate with the windscreen on top. The cutaway of section A to A shows how the microphone fits into the plate.


GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

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