Type 1003 is designed for high-precision measurement where a microphone with high sensitivity is required.

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Typical Use Cases​

Precision sound measurement

Premium class ANSI sound level meters

Compliance with IEC 61672 Class 1

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Use of Free-Field Microphones

Type 1003 is not only suited for use in class 1 Sound Level Meters but also for all high-precision acoustic measurements where a robust and stable, externally polarized free-field microphone with an upper frequency of 40 kHz is required. 

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At higher frequencies, reflections and diffractions cause a pressure increase in front of the diaphragm of a microphone. If not corrected for this would result in an increased output voltage.

A free-field optimisation means that the frequency response of the microphone has been designed in such a way that the free-field response at 0 degrees incidence is flat. This microphone is optimized for use with the protection grid in place.

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Free-field microphones are commonly used for sound measurement in an anechoic chamber or far away from reflecting buildings, etc. Another area for free-field microphones is for general electroacoustic measurements like loudspeaker and microphone measurements.​

 

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