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1/2inch, Pressure, 20kHz

M 673

  • 1/2inch, Pressure, 20kHz

  • The M 673 is a 1/2 inch prepolarized pressure field measurement microphone that is generally used to measure the acoustic performance of a product located in a coupling cavity. The main part is made of stainless steel so that it has good toughness and long-term stability.

    The MegaSig A 802 preamplifier is recommended for optimal test results.


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Description

Specifications

ParameterValue
Dimensions1/2inch
Sound Field TypePressure field
Polarization Voltage0V（Pre-polarized）
Frequency Response3.15Hz – 20kHz ± 2dB 12.5Hz – 10kHz ± 1dB
Dynamic Range26dB（A）-147dB（1000 Hz THD <3%）
Noise Floor26dB（A）
Sensitivity12mV/Pa(-38.0± 2) dB re 1V/Pa
StandardIEC 61072-ΙTYPE Standard
Typical Capacitance12.0 pF
Pressure Equalization MethodPost-equalization
Operating Temperature-30℃ ~ 85℃
Temperature Coefficient-0.012dB/℃
Humidity Coefficient<0.1dB (0% - 90% no condensation)
Relative Humidity0% - 90% no condensation
Static Pressure Coefficient-0.01dB/kPa

Typical frequency response curve

14.png

Dimensions

Height including protective cage

12.8mm

Diameter with protective cage

13.2mm

Height excluding protective cage

11.8mm

Diameter excluding protective cage

12.7mm

Front-loaded extreme fit thread

11.7mm - 60UNS

Protective cage engaging thread

12.7mm - 60UNS



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