BS EN 60118-8:2005 PDF

Scope: The purpose of this part of IEC 60118 is to describe methods for a test which simulates the acoustical effects of a median adult wearer on the performance of a hearing aid. It establishes certain guidelines for simulated in situ measurements of hearing aids; it describes a simplified method for simulated in situ measurements of hearing aids and a description for determination of the directivity index (DI) of directional microphones in hearing aids in the horizontal plane. In addition this second edition now specifies tolerances. Conformance to the specifications in this International Standard is demonstrated only when the result of a measurement, extended by the actual expanded uncertainty of measurement of the testing laboratory, lies fully within the tolerances specified in this International Standard extended by the values for Umax

BS EN 60118-8:2005 Referenced Document

IEC 60263 Scales and sizes for plotting frequency characteristics and polar diagrams*， 2020-06-26 Update
IEC 60711 Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts

2006 BS EN 60118-8:2006 Electroacoustics - Hearing aids - Methods of measurement of performance characteritics of hearing aids under simulated in situ working conditions
2006 BS EN 60118-8:2005 Electroacoustics - Hearing aids - Part 8: Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions
1985 BS 6083-8:1985 Hearing aids - Methods for measurement of the performance characteristics of hearing aids under simulated in situ working conditions