ASA S3.22 PDF download

ASA S3.22 – American National Standard Specification of Hearing Aid Characteristics

This standard describes certain hearing aid measurements and parameters that are deemed useful indetermining the electroacoustic performance of a hearing aid. Some of these lend themselves tosetting of tolerances for the purpose of maintaining product uniformity and for compliance with theperformance specified for a model.

It is not the intent of this document to restrict the variety of hearing aid performance available nor toinhibit in any way advances in the state of the art.

This standard is limited to the specification of certain electroacoustic characteristics based onsinusoidal and other steady-state test signals. Measurements described in this standard are notintended to reflect in situ performance of hearing aids, directional performance of directional hearingaids, or certain performance properties of digital hearing aids, such as processing delay.

Notes in the standard are not considered to be part of the standard.