Noise Cancelling microphone EMC9475-2C eletret microphone -ESUNTECH

9.4mmx7.5mm  Omni-directional Noise Cancelling mini capacitive microphone condenser mic capsule 9475  for household electrical appliances,computer,toy,telephone,cell phone,earphone,headset headphone,medical,meter and instrument - Changzhou Esuntech Co Ltd.        

Test Conditions：VS=2.0V，RL=2.2KΩ,Temp=20±2°C, R.H=60±5%

ITEM	Symbol	Test Conditions	Min		Standard		Max		Unit
Sensitivity	S	f=1KHz,	-58		-55		-52		dB
		S.P.L=1Pa							0dB=1V/Pa
Impedance	Z	f=1KHz,					2.2		KΩ
		S.P.L=1Pa
Directivity	Omni-directional
Current  Consumption	I							500		μA
Operation Voltage Range	VS			1		2		10		V
S/N Ratio	S/N(A)	f=1KHz, S.P.L=1Pa		55						dB
		A Curve
Decreacing Voltage Characteristic	△S	f=1KHz, S.P.L=1Pa						-3		dB
		VS=4.5-3.0V
Max.Input Sound Level	MISPL	f=1KHz,						115		dB
		Distortion≤3%

TEST CIRCIUT

Vs:Source Voltage2.0V   RL:Load Resistance2.2KΩ

  C1=10pF  C2=33pF

Test Setup Drawing