Measurement microphone
NTi Audio M2230
Class 1 measurement microphone according to IEC 61672 – needed when measured values must comply with a standard, for instance with level requirements.
Key data
Link to section “Key data”Specifications from the cited source. Anything missing there is shown here as “not available”.
- Connection
- XLR (phantom power)
- Frequency range
- 5 Hz – 20,000 Hz Manufacturer
- Sensitivity
- not available
- Maximum SPL
- 137 dB 3 % THD · 1 kHz Manufacturer
- Self-noise
- 16 dB(A) Manufacturer
- Polar pattern
- Omnidirectional
- Powering
- 48 V phantom power
- Calibration
- Typical curve According to the product page, a calibration certificate from the manufacturer is available as an option and is not automatically included in the delivery.
- Standard
- IEC 61672 Class 1
Why “Professional”?
Link to section “Why “Professional”?”Listed by the manufacturer as a Class 1 measurement microphone to IEC 61672, with a metal diaphragm, 16 dB(A) self-noise and an optional calibration certificate – the class is a prerequisite for measurements to standard, for example under noise control requirements.
Evidence: Class 1 / Type 1 Certified Measurement Microphones (M2230, M2340)
According to the manufacturer, the microphone consists of the MA220 preamplifier and a capsule; the class rating applies to the combination.
Sources
Link to section “Sources”-
Tier A · primary source
Class 1 / Type 1 Certified Measurement Microphones (M2230, M2340)
NTi Audio AG · accessed on 27 September 2026