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ZT-371-507 Microphone Set -1/2''
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Description
ZT-371 Microphone Set is a pre-polarization free-field measurement microphone that measures the undistorted true sound pressure of the microphone before it is placed in the sound field. The presence of the microphone in the sound field will affect the sound field and change its high-frequency sound field. Based on this characteristic, the free-field microphone has its frequency response adjusted to compensate for errors brought to high-frequency sound pressure in the sound field
Specifications
Sound field type Free field type
Sensitivity, mV/Pa (dBV/Pa) 12.5 mV (-38 dB) ± 2 dB
Frequency response range 10 Hz - 40 kHz (±2 dB)
Polarization voltage 0V
Dynamic range (based on 20 uPa) 20～150dB
Upper limit of dynamic range (based on 20 uPa) ≥150dB （250Hz，distortion < 3%）
Equivalent noise (based on 20 uPa) ≤20dBA（250Hz）
Range of operating temperature -30℃ ～ +70℃
Temperature coefficient 0.005dB /℃（-10℃ ～ +50℃，250Hz）
Static pressure coefficient -0.01dB /kPa
Relative humidity range 0～90%(without condensation)
Relative humidity coefficient <0.1dB(0 - 90% without condensation)
Pressure equalization method Post-pressure equalization
IEC 61094-4 Designation WS2F
Input impedance >10GΩ/0.5pF
Output impedance <20Ω，<0.1%
Max. output voltage >5.0Vrms (+24 V available)
Power supply IEPE（2mA～10mA）
Rated operational current 4mA
Noise (A-weighted) <3µVrms
Linearity (20 - 20 KHz) <10µVrms
Gain -0.7dB
Connector BNCport
Applications
High-frequency measurementUltrasonic testing