Abstract: This paper introduces a method to measure infrasound wave by the use of moving coil sonic-electric converting principle.Air-core under the shield is forced to vibrate by the air micro-pressure flow coursed by infrasound wave,then the value of magnetic flux is changed and the generation of induced electromotive force is caused,thus infrasound signal is converted into electrical signal.According to the result testing in the simulation environment of infrasound,this device can measure the infrasound signal correctly.

Key words: infrasound wave, film vibration, moving coil sonic-electric converting