Hearing Aid Tester

H.H. Aerospace Design Co., Inc. incorporated NASA technology into the development of the Hearing Aid Malfunction Detection Unit (HAMDU). Hearing aids often develop malfunctions that are not detected by the wearer. The HAMDU is expected to provide an effective countermeasure to children's hearing aid problem. Worn by user, as adjunct to hearing aid, HAMDU is miniaturized, battery powered system which monitors hearing aid operation. Twice every hour, HAMDU's electrical circuitry performs a check of hearing aid's battery, amplifier and receiver cord. In classroom use, teacher would immediately be alerted that child's hearing aid was malfunctioning or was turned off by accident.

Full article: http://hdl.handle.net/hdl:2060/20070018895