Infrasound Sensor

MB3a

The MB3a is an infrasound sensor developed by the CEA, following the MB2000 and MB2005 series, which allows the recording of very-low-frequency acoustic signals over a broad frequency band, with an excellent resolution and a large dynamic range.

The MB3 is remarkable for an extremely low level of instrumental noise (<-80 dB.Pa / ? Hz @ 1 Hz) allowing the sensor to resolve more than 18 dB the Low Noise Model. This sensor has been designed especially to meet the requirements of infrasound stations of the IMS network (International Monitoring System) installed as part of the CTBT (Comprehensive nuclear Test Ban Treaty).

MB3d

MB3d sensors is the digital version of the MB3a.

Recommended for short-term measurements, it encapsulates a low-noise 24 bit digitizer (ADC), with a calibration board, a time card and a storage capacity of 1 Go.

SIS-1

SIS-1 is a rugged-field infrasound sensor, ideal for portable systems, remote sites, or in addition to a seismic station.

With the small size and weight, SIS-1 is easily deployable and provides reliable infrasound signal over a wide frequency bandwith.

MB3a PP - 2 PRESSURE OUTPUTS VERSION

Seismo Wave has developped a new version of the MB3a analog infrasound sensor in order to records high amplitude atmospheric events. The two pressure outputs are respectively set at 2mV/Pa and 20mV/Pa. At 2mV/Pa, the dynamic range of the pressure output reaches +/- 10 550 Pa.