Microphones and earphones for speech communications Ingestion-build-264231 BS 5975:2019 on temporary works

BS 5975:2019 on temporary works procedures has been updated to take account of the Construction (Design and Management) Regulations 2015 (CDM)

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BS ISO 5151 specifies the test methods for determining the capacity and efficiency ratings

The competitive world in which customer expectations and behaviour evolve has changed

Annex C (normative) Outer gamut patches

Microphones and earphones for speech communications Ingestion-build-264231 BS 5975:2019 on temporary works1 Scope This standard applies to the microphone part and earphone part of handsets, headsets or earsets for speech communications, and also to the microphone units and earphone units of built in handsets, headsets or earsets. The object of this standard is to establish definitions relating to these electroacoustic transducers, and to standardize the characteristics to be specified and the relevant methods of measurement. This does not exclude the use