SS 770-18

Pressure, IEPE, SS 770-18
Low noise pressure field artificial ear is a kind of sensor which simulates the acoustic impedance load of human ear. It is used to measure the telephone receiver, headset and so on.
SS 770-18 consists mostly of a 1/2 pressure field microphone, a preamplifier, and 318 coupling cavity 3. It is a prepolarized pressure field measurement microphone kit.
SS 770-18 + PM 0083 + AM 581 are a classical configuration for earphone test.

Specifications

Specifications

Types of Acoustic Fields	Pressure Field
Polarization voltages	0V（Prepolarized）
Frequency range	20Hz – 16kHz ± 1dB
Dynamic range	21dB（A）- 135dB（1000 Hz THD<3%）
Background noise	21dB（A）
Sensitivity mV/Pa(dBV/Pa)	45mV (-26.0dB) ± 2dB
Maximum Output Voltage	5.6V
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	<0.1dB