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ZT-351-547 Microphone Set -1/4''
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Description
ZT-351 microphone is a 1/4'' pre-polarization free-field measurement microphone. Its sensor can convert acoustic signal into electrical signals. Using Titanium film and make special stability treatment, with wide frequency range, good frequency characteristics, wide dynamic range, good dynamic characteristics, good temperature and longtime stability, especially suitable for high frequency and high pressure level measurement.
Specifications
Sound field type Free field type
Sensitivity, mV/Pa (dBV/Pa) 15.8mV±2dB -36dBV/Pa±2dB
Frequency response range 4 Hz - 40 kHz (±2 dB)
Polarization voltage 0V
Dynamic range (based on 20 uPa) 20～140dB
Upper limit of dynamic range (based on 20 uPa) ≥140dB （250Hz，distortion < 3%）
Equivalent noise (based on 20 uPa) ≤20dBA（250Hz）
Range of operating temperature -20℃ ～ +60℃
Temperature coefficient 0.015dB /℃（-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 WS3F
Input impedance >2GΩ/50pF
Output impedance <20Ω
Power supply IEPE（2mA～10mA）
Rated operational current 4mA
Noise (A-weighted) <3µVrms
Linearity (20 - 20 KHz) <10µVrms
Gain -1.2dB
Connector SMB port
Applications
Low-noise measurementCompact acoustic testing