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Historical background of bone conduction hearing devices and bone conduction hearing aids.

Journal article
Authors Albert Mudry
Anders Tjellström
Published in Advances in oto-rhino-laryngology
Volume 71
Pages 1-9
ISSN 0065-3071
Publication year 2011
Published at Institute of Clinical Sciences, Department of Otorhinolaryngology
Pages 1-9
Language en
Keywords Audiometry, Auditory Threshold, Bone Conduction, Hearing Aids, history, Hearing Loss, Conductive, physiopathology, rehabilitation, History, 19th Century, History, 20th Century, History, 21st Century, History, Medieval, Humans, Rehabilitation of Hearing Impaired, history, Skull, anatomy & histology
Subject categories Otorhinolaryngology


During the last 20 years, bone-anchored hearing aids (Baha(®)) became a familiar solution in the treatment of some types of hearing loss. The aim of this chapter is to present the different historical steps which have permitted the production of this new bone conduction hearing device. The recognition of bone conduction hearing is old and was known at least in Antiquity. During the Renaissance, Girolamo Cardano demonstrated a method by which sound may be transmitted to the ear by means of a rod or the shaft of a spear held between one's teeth: this was the beginning of teeth stimulators to improve hearing, firstly in connection with a musical instrument and then, in the second part of the 19th century, with the speaker. The development of the carbon microphone at the beginning of the 20th century allowed the construction of the bone conduction vibrator placed on the mastoid area, notably supported by eyeglasses since the 1950s. Confronted by various problems, and notably the loss of part of sound in the soft tissue of the external mastoid, the idea to implant the vibrator into the mastoid bone was developed in Göteborg, and the first Baha was implanted in 1977 by Anders Tjellström. From that date, various improvements allowed the development of the actual Baha. These different steps are presented in this study, supported by original documentation.

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