Acoustics. Audiometric test methods - Sound field audiometry with pure-tone and narrow-band test signals Ingestion-build-276583 staff and performers in assembly

staff and performers in assembly buildings of all sizes and that may help to protect the building and its contents against the effect of fire

for effective responses to disasters and failures

7 Mechanical functional tests

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Acoustics. Audiometric test methods - Sound field audiometry with pure-tone and narrow-band test signals Ingestion-build-276583 staff and performers in assemblyBS EN ISO 8253 2: 2009 Acoustics. Audiometric test methods. Sound field audiometry with pure tone and narrow band test signals BS EN ISO 8253 2 specifies relevant test signal characteristics, requirements for free, diffuse, and quasi free sound fields, and procedures for sound field audiometry using pure tones, frequency modulated tones or other narrow band test signals presented by means of one or more loudspeakers. The primary purpose is the