Sound system equipment. Methods for measuring and specifying the performance of sounders (electroacoustic transducers for tone production) Ingestion-build-201039 Maintenance of an I&HAS is

Maintenance of an I&HAS is carried out at the clients premises

Measuring and improving the performance of the outcomes of obsolescence management activities

Classes of appliances

further clauses handling special types of ME equipment or ME systems and applying in connection with the "General requirements"

Manufacturers of PVC-U pipes

Sound system equipment. Methods for measuring and specifying the performance of sounders (electroacoustic transducers for tone production) Ingestion-build-201039 Maintenance of an I&HAS is1 Scope and object This International Standard is applicable to sounders, which are treated as entirely passive electroacoustic transducer elements. Piezoelectric diaphragms, which are the principal components of piezoelectric sounders, are also included. Buzzers which are sound sources with built in electric circuits are excluded. The object of this standard is to standardize the definitions relating to these electroacoustic transducers, and to list