Performance and Specifications

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A microphone is only as good as its capsule, and we use a special hand-selected thread-on capsule with a metal diaphragm built for us by ACO Pacific. Every mic ships with its own calibration report, and is available either with or without a Type 1 Certification certificate.

iPrecisionMic is very low noise, guaranteed to be below 18 dBA, for measuring room noise. It is also very flat, with a 3 dB rolloff below 3 Hz. The preamp self noise is typically 5 dB below the capsule noise floor.

iPrecisionMic has two gain ranges, which may be selected in the AudioTools app. The low range provides a typical usable range of 20 dBA to 110 dBA. Switching to high range provides a typical usable range of 35 dBA to 125 dBA. To switch gain ranges, go to the Input Source page, from the Setup page of any module.

iPrecisionMic has these specifications:

Typical frequency response curve included with each microphone

  • Response Characteristic Free Field response 0°
  • Omni-directional
  • Temperature Coefficient -10°C to 50°C, 0.01dB/°C
  • Influence of Humidity <+/-0.1dB (non-condensing)
  • Long Term Stability at 20° >250 years/dB
  • Dynamic Range (3% THD) 20 dBA – 125 dBA in two ranges
  • Frequency Response +/- 1dB 10 Hz – 20 kHz
  • Fixed-iOS interconnect cable length 1m
  • Made in USA

Here is an FFT showing typical noise floor of the microphone:
noise study.pdf