CM 311+A 804

Pressure, IEPE, CM 311+A 804
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 804 includes the CM 311 pressure field artificial ear chamber and A 804 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 804 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

Parameter	Value
Sound Field Type	Pressure field
Earphone Type	入耳式
Coupler Volume	/
Frequency Response	100Hz - 10kHz ±0.5dB（模拟人耳阻抗范围） 20Hz – 10kHz ± 0.5dB 10Hz – 16kHz ± 1dB（耦合腔频响范围）
Dynamic Range	33dB（A）- 143dB （1000 Hz 失真<3%）
Noise Floor	33dB（A）
Sensitivity	12.5mV (-38.0dB) ± 2dB
Standard	ITU-T P.57，2 型传感器， IEC 60318-4：2010 Ed.1.0
Connector	BNC
Operating Temperature	-20°C to 60°C
Relative Humidity	10- 90% no condensation

Specifications

Standard	ITU - T P.57, Type 2 sensors, IEC 60318 - 4:2010 Ed.1.0
Frequency rang	100Hz - 10kHz ±0.5dB（Simulated human ear impedance range）
Frequency rang	20Hz – 10kHz ± 0.5dB 10kHz – 16kHz ± 1dB
Sensitivity mV/Pa(dBV/Pa)	12.5mV(-38dB±2dB)re 1V/Pa
Dynamic range	33dB（A）- 141dB（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）