OM226 Permanent Outdoor Microphone Class 2


OM226 permanent outdoor microphone is developed by BSWA Tech for outdoor noise monitor. Compared with semi-permanent outdoor microphone, the main improvement of permanent outdoor microphone is the built-in electrostatic actuator which can be used for remote system check. The external excitation signal source that can generate sine wave signal with frequency of 500 Hz and amplitude of 210 Vpeak ~ 280 Vpeak (about 150 Vrms ~ 200 Vrms) can excite the microphone to generate an output signal of 90 dB@1 KHz. Electrostatic actuator can be used for whole system check including microphone, cable and measuring instrument, but it cannot completely replace the sound calibration. Therefore, it is still necessary to use sound calibrator for calibration regularly.

OM226 outdoor microphones have been specially designed to achieve the free-field frequency response both in 0° and 90° direction of incidence within the limits of IEC 61672-1 Class 2. It’s suitable for aircraft, airport, urban, traffic and industrial noise measurement. Each microphone is supplied with an individual calibration certificate that contains the actual sensitivity and free-field frequency response data for the complete set of outdoor microphones. Users can use the calibration data to correct the measurement data for more accurate results.

OM226 meets the IP55 ingress protection rating. The windscreen, internal rain hood and dust mesh can fully protect microphone to against wind, rain, snow, dust and other severe weathers. The bird spike prevents impact of perching birds to the measurement.


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