Control of a laser cutting machine by means of airborne sound signals

A laser cutting machine for cutting workpieces at a processing point, the laser cutting machine comprising:

• a laser cutting head, which is mounted so to be movable at least in an X-direction and defines a beam propagation direction of a laser beam;
• a storage device for storing the workpiece to be cut;
• a machine frame with at least one frame part;
• at least one airborne sound sensor, which is configured to be moved in the X-direction relative to the at least one frame part, wherein the at least one airborne sound sensor is arranged in the beam propagation direction after or below the processing point and oriented towards the processing point, and
• a bridge with two bridge feet arranged laterally thereon for guiding the bridge on the machine frame in the X-direction perpendicular to a Y-direction, wherein the at least one airborne sound sensor is arranged at least indirectly on a bridge foot.