Measurement Microphones

All Measurement Microphones are assembled in a clean room to ensure that the microphones maintain their inherent low noise floor and high stability, even when used in environments with a combination of high humidity and high temperature.

Model	14403	14404	14407	14421	14424D	14423	14425		14435
Diameter	1/2″								1/4″
Open Circuit Sensitivity: mV/Pa	15		25	30		50	40		4
Dynamic Range (dB) *	30～150		25～145	21～142	24～153	17～140	18～140		40～160
Frequency Range (Hz)	20～40,000	20～12,000	10～16,000	20～12,500	10～16,000	10~20,000	10～16,000		20～20,000
Ambient Temperature Coefficient (dB/°C)	0.01	0.01	0.01	0.02	0.015	0.015	0.015		0.02
Polarization Voltage (V)	200			0
Venting	Rear
Dimensions	IEC 61094-4 Type WS2							IEC 61094-4 Type WS3
Operating Temperature	-20 °C ～ +70 °C			-20 °C ～ +60 °C
Humidity	25 % ～ 90 %(RH)
Atmospheric Pressure	65 kPa ～108 kPa
Frequency Response Characteristic	Free field	Pressure	Free field		Pressure	Free field			Pressure
		field			field				field