C 318+M 671+A 804

Pressure, IEPE,318
The pressure field artificial ear is a sensor that simulates the acoustic impedance load of the human ear. It is used to measure telephone receivers, headsets and so on.
C 318+M 671+A 804 consists of C 318 coupling cavity, 1/2 inch pressure field microphone, A 804 preamplifier 3 parts, is a prepolarized pressure field measurement microphone kit.
With MegaSig PM 0083 and other IEPE signal conditioning to achieve the best test results.

Specifications

Specifications

Types of Acoustic Fields	Pressure Field
Polarization voltages	0V（Prepolarized）
Frequency range	20Hz - 16kHz ± 1dB
Dynamic range	33dB（A）-147dB（1000 Hz THD<3%）
background noise	33dB（A）
sensitivity mV/Pa(dBV/Pa)	12mV (-38.0dB) ± 2dB
Maximum Output Voltage	1V
Output Impedance	<50Ω
Power Supply	2mA - 10mA（typical 4mA）
Pressure Equalization Method	Post-equalization
Connection	BNC
Temperature range, operation	-20℃ to 60℃
Temperature range, storage	Temperature：25℃±5℃，Humidity：50%±15%RH（Ensure the long-term stability of the sensor）
Humidity range non condensing	20 - 90% without condensation
Humidity coefficient	<0.003dB（250Hz, Reference temperature 40°C, Reference RH 50%）