Piezoelelectric Sensor Compression Assembly, Self-Test and Background Sensitivity

摘要

The present invention relates generally to an airborne sound sensor in the form of a compression assembly for detecting airborne sound. The system reduces the risk that workers will be exposed to dangerous high pressure gas jets which the industrial workers cannot see or hear escaping from high pressure industrial pressurized gas systems. A compression assembly (5) for detecting sound pressure level using a transducer (11) compressed against a top element (9) and a lower element (12) so as to compress the transducer (11) across the sensing faces.