HD 450.3 S1:1984
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Hearing aids - Part 3: Hearing aid equipment not entirely worn on the listener
01-03-1986
06-11-1984
Describes a method of determining the overall electro-acoustical performance of hearing aid equipment used in the rehabilitation of persons having impaired hearing.
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