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ZT-372 Microphone Cartridge - 1/2''-PF
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Description
ZT-372 is a 1/2'' pressure-field type pre-polarization broadband measurement microphone. Thanks to the use of titanium alloys and precision stainless steel, as well as its compact construction and low-sensitivity design, it is not only excellent in corrosion resistance and robustness, but also extremely high stability and a very wide dynamic range. ZT-372 Measurement Microphone is usually used with an ear stimulator coupled cavity, such as 318 Ear Stimulator according to IEC60318-1, 711 Ear Stimulator according to IEC60318-4 (formerly called "IEC711"). It can also be used to measure the sound pressure in the closed cavity and on the surface of an object. Besides, it can be used as a diffusion field microphone.
Specifications
Sound field type Pressure field type
Sensitivity (@ 250 Hz ± 2 dB) 12.5 mV/Pa
Sensitivity (@ 250 Hz ± 2 dB) -38 dB re 1V/Pa
Frequency response (±2 dB) 3.15Hz~20kHz
Polarization voltage 0V(pre-polarization)
Typical capacitance 13pF
Upper limit of dynamic range (re. 20 uPa) ≥160dB(distortion < 3%)
Lower limit of dynamic range (re. 20 uPa) ≤20dB(A)
Range of operating temperature -30℃~80℃
Temperature coefficient (-10 ℃ to 50 °C) 0.005dB/℃
Static pressure coefficient -0.01dB/kPa
Relative humidity range (without condensation) 0~90%RH
Relative humidity coefficient <0.1dB(0 - 90% RH without condensation)
Pressure equalization method Post-pressure equalization
IEC 61094-4 Designation WS2P
Height (without protective grid) 12.6mm
Diameter (including protective grid) 13.2mm
Height (without protective grid) 11.5mm
Diameter (without protective grid) 12.7mm
Preamplifier with thread 11.7mm-60UNS
Protective grid thread 12.7mm-60UNS
Applications
High-SPL pressure measurementIndustrial acoustics