Quantifying Telecoil Performance: Understanding Historical and Current ANSI Standards

ABSTRACT

Methods for telecoil performance measurement have advanced from the relatively primitive physics lab procedure specified in the 1976 and 1986 American National Standards Institute hearing aid standards to the simulated telephone tests in the 1996 standard. Parallel advances in defining a hearing aid compatible telephone receiver as well as new telecoil testing methods had to occur for the 1996 tests to become possible. The new tests allow more accurate assessment of telecoil parameters and better estimation of expected real-life performance in telecoil mode.

Telecoil - telephone simulator - ANSI S3.22-1996 - SPLITS - STS - TMFS

REFERENCES

• 1 HIA Standard. 
• 2 American National Standards Institute Specification of Hearing Aid Characteristics, ANSI S3.22- 1976.  New York: Acoustical Society of America; 1987
• 3 Lybarger S F. Development of a new hearing aid with magnetic microphone.  Electrical Manufacturing 1947;November.
• 4 Goldberg H. Telephone amplifying pickup devices.  Hearing Instruments . 1975;  26 19-20
• 5 Teder H. Hearing aid-telephone compatibility: past, present, future.  Hearing Instruments . 1983;  34 22-36
• 6 Electronic Industries Association. Magnetic Field Intensity Criteria for Telephone Compatibility with Hearing Aids, EIA Standard RS-504 Washington, DC: Electronic Industries Association 1983
• 7 American National Standards Institute. Specification of Hearing Aid Characteristics , ANSI S3.22- 1987 New York: Acoustical Society of America 1987
• 8 American National Standards Institute. Specification of Hearing Aid Characteristics, ANSI S3.22-1987