Sound and vibration sensor

A sound and vibration sensor, the sound and vibration sensor comprising:

• a pressure generating arrangement adapted to generate pressure variations in both a first rear volume and a second rear volume in response to vibrations of the sound and vibration sensor, the pressure generating arrangement comprising a moveable mass secured to a suspension member;
• and
• a first pressure detecting arrangement and a second pressure detecting arrangement, wherein the first pressure detecting arrangement and the second pressure detecting arrangement are acoustically connected to an exterior of the sound and vibration sensor via at least one front volume, the at least one front volume each acoustically connected to the exterior of the sound and vibration sensor via a respective sound inlet,
• wherein the first pressure detecting arrangement is acoustically connected to the first rear volume, and the second pressure detecting arrangement is acoustically connected to the second rear volume, and
• wherein the moveable mass and the suspension member are configured to simultaneously:
• increase pressure in one of the first rear volume or the second rear volume, and
• reduce pressure in another the first rear volume or the second rear volume.