Historical
ANSI S3.22-2003
Specification of Hearing Aid Characteristics (Contains Erratum released in April 2007)
Air conduction hearing-aid measurement methods suitable for specification and tolerance purposes. Includes output sound pressure level (SPL) with a 90-dB input SPL, full-on gain, frequency response, harmonic distortion, equivalent input noise, current drain, induction-coil sensitivity, and static and dynamic characteristics of automatic gain control hearing aids. Configurations given for measuring the input SPL to a hearing aid. Allowable tolerances in relation to values specified by the manufacturer are given for certain parameters. Three appendices.
Content Provider
Acoustical Society of America [asa]
