Zxonic - Model Type 1003 -1/2 Inch Free-Field Microphone, Externally Polarized 3.15 Hz – 40 kHz

• Dyn. range : 20 – 162 dB
• Freq. range : 3.15 – 40000 Hz
• Polarization : 200 V
• Sensitivity : 14.1 mV/Pa
• Standards : IEC 61094-4 WS2F

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

Typical Use Cases

• Precision sound measurement
• Premium class ANSI sound level meters
• Compliance with IEC 61672 Class 1

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.

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.

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.

• Standard: IEC 61672
• Frequency reponse characteristics: Free-field
• Polarization voltage [V]: 200
• Sensitivity [mV/Pa]: 14.1 mV/Pa
• Lower limiting frequency: 3.15 Hz
• Higher limiting frequency: 40 kHz
• Cartidge thermal noise: 20 dB(A)
• Dynamic Range: 20 - 162 dB(A)
• Diameter: 1/2 inch
• Venting: Side 
• Operating temperature range: -30 - 100
• Operating humidity range: 0 - 100% RH without condensation