NBN EN 61329 : 1997

1 Scope and object
2 Normative references
3 Definitions and symbols
3.1 Classification, structures and components
3.2 Characteristics, symbols and units
4 Rated conditions
5 Characteristics and measuring methods
5.1 Measuring conditions
5.2 Measuring equipment
5.3 Electroacoustic transducer characteristics of
      the sounder
5.4 Electrical and mechanical characteristics of
      sounders
5.5 Piezoelectric diaphragm
6 Physical and other characteristics
6.1 Characteristics for all transducers
6.2 Characteristics for sounders
6.3 Characteristics for piezoelectric diaphragms
7 Classification of the characteristics to be
      specified
Tables
1 Characteristics of sounders to be specified, and
      classification
2 Characteristics of piezoelectric diaphragm to be
      specified, and classification
Figures
1 Voltage and d.c. component of square-wave signals
2 Diagram of sounder measuring system
3 Diagram of sounder testing system
4 Diagram of piezoelectric diaphragm measuring system
5 Example of a diaphragm supporter
Annexes
A (informative) Bibliography
ZA (normative) Normative references to international
      publications with their corresponding European
      publications

Applies to sounders, treated as entirely passive electroacoustic transducer elements. Piezoelectric diaphragms are also included, but not buzzers, which are sound sources with built-in electric circuits.