CM 311+A 803

Pressure, IEPE, CM 311+A 803
The pressure field artificial ear is an ear simulator that simulates the way an earplug catheter is inserted into the ear canal or auricle.
The CM 311+A 803 includes the CM 311 pressure field artificial ear chamber and A 803 preamplifier. It is a pre-polarized pressure field measurement microphone kit specifically designed for audio production line testing of in-ear headset products.
The classic configuration of CM 311+A 803 artificial ear + PM 0083 signal conditioner + AM 581 artificial mouth, with its extremely high stability, has become the standard configuration of most domestic and foreign in-ear headphones audio test systems.

Specifications

Specifications

Standard	ITU - T P.57, Type 2 sensors, IEC 60318 - 4:2010 Ed.1.0
Frequency range	20Hz – 10kHz ± 0.5dB 10kHz – 16kHz ± 1dB
Sensitivity mV/Pa(dBV/Pa)	12.5mV(-38dB±2dB)re 1V/Pa
Dynamic range	33dB（A）- 143dB（1000 Hz THD<3%）
Connection type	BNC
Materials	Stainless steel
Temperature range, operation	-20℃ to 60℃
Relative humidity	10 - 90% without condensation
Storage condition	Temperature：25℃±5℃，Humidity：50%±15%RH（Ensure the long-term stability of the sensor）