SS 770-11

Pressure, IEPE, SS 770+11
SS 770+11 is an ultra low noise ear simulator kit for making earphones acoustic measurements, which is coupled to the human ear by ear tip, or ear rubber.
SS 770+11 is a polarized ear simulator according to IEC 60318-4 (60711), including HS 711 pressure sensor，MA 802 preamplifier.
SS 770-11 + U962 + U921 are a classical configuration for earphone test.

Specifications

Specifications

Types of Acoustic Fields	Pressure Field
Polarization voltages	0V（Prepolarized）
Frequency range	20Hz – 8kHz ± 0.5dB 8kHz – 16kHz ± 1dB
Dynamic range	16dB（A）- 135dB（1000 Hz THD<3%）
Background noise	16dB（A）
Sensitivity mV/Pa(dBV/Pa)	50mV (-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