A device for permanently monitoring the state of the mechanical members machines for control of the evolution of the noise issued.

摘要

A device according to the invention comprised of at least one transducer (1) capable of being fixed to a machine by means of a support (2) and electrically connected to electronic circuits (5); the transducer is comprised of a cylindrical casing inside which are fixed two armatures of an electret capacitor which are separated by an air gap, said transducer being housed in a bore provided at the extremity of said support and surrounded by at least one electrically and acoustically insulating sleeve (241, 242) which is also preferably surrounded by additional sound proofing (3). The technical field of the invention is the monitoring and mesurement of noises and vibrations emitted by machines.