TYPE 4948

Aerospace Surface Microphone

Surface Microphone Type 4948 is designed to be used in aerospace. For example, on airplane surfaces during in-flight testing and is also well suited to wind-tunnel testing, limited spaces, or near to hard reflective surfaces.

Solicitar oferta

Type 4948 is a 1/2" CCLD surface microphone intended for use on airplane surfaces during in-flight testing. The microphone is also well suited to wind-tunnel testing, limited spaces, or near to hard reflective surfaces.

USE SCENARIOS

  • Measurement of sound pressure on surfaces
  • Acoustic fatigue testing of airplanes
  • Wind-tunnel measurements
  • Medium- to high-level measurements
  • Measurement in confined spaces

The microphone offers high mounting flexibility and its diaphragm is flush with microphone housing in order to minimize the effect of wind-generated noise on the microphone.

Capacitance
pF
Diameter
1/2
Dynamic range
55 – 160 dB
Frequency range
5 – 20000 Hz
Inherent noise
55 dB A
Lower limiting frequency -3dB
5 Hz
Optimised
Surface
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.007 dB/kPa
Sensitivity
1.4 mV/Pa
Temperature coefficient
0.0013 db/ºC
Temperature range
-55 – 100 C
Venting
Front
Weight
gram
Sound field
Pressure-field
Input type
CCLD IEPE
Microphone type
Surface