Acoustics. Audiometric test methods - Sound field audiometry with pure-tone and narrow-band test signals Ingestion-build-61878 This document is used in

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Acoustics. Audiometric test methods - Sound field audiometry with pure-tone and narrow-band test signals Ingestion-build-61878 This document is used inBS 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