SSH EN ISO 389-7:2004

Akustika - Zero e referimit për kalibrimin e pajisjeve audiometrike - Pjesa 7: Nivelet e pragut te referimit në kushtet e dëgjimit në fushat e lira dhe në fushat e përhapjes

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:1996)

Scope

Specifies a reference threshold of hearing for the calibration of audiometric equipment used under definite conditions. The listeners are otologically normal persons in the age from 18 to 25 years inclusive. The data are given in numerical form for the preferred frequencies in the one-third-octave series from 20 Hz to 16 000 Hz in accordance with ISO 266.