gms | German Medical Science

76th Annual Meeting of the German Society of Oto-Rhino-Laryngology, Head and Neck Surgery

German Society of Oto-Rhino-Laryngology, Head and Neck Surgery

04.05. - 08.05.2005, Erfurt

Improvement of speech perception in patients with BAHA

Meeting Abstract

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  • corresponding author Robert Mlynski - Univ. HNO-Klinik Würzburg
  • Ludwig Moser - Univ. HNO-Klinik Würzburg
  • Konrad Schwager - Univ. HNO-Klinik Würzburg

Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie. 76. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e.V.. Erfurt, 04.-08.05.2005. Düsseldorf, Köln: German Medical Science; 2005. Doc05hno607

The electronic version of this article is the complete one and can be found online at:

Published: September 22, 2005

© 2005 Mlynski et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.



Supply of bone ancored hearing aids (BAHA) has proven to be sufficient for hearing rehabilitation in patients with conductive hearing loss not accessable for otosurgical improvement. Additionally, treatment of patients with unilateral deafness appears to be beneficial by transcranial contralateral cochlear stimulation.

We present the data of speech perception tests in patients with variuos hearing conditions, i.e. conductive hearing loss, combined hearing loss and unilateral deafness before and after fitting of BAHA. In addition to conventional speech perception test, patients undewent an alternating binaural speech test in noise.

Patients with conductive hearing loss reached 100% discrimination of monosyllabic words between 65 and 85dB (SPL). An improvement of 20% in discrimination of monosyllabic words at 65dB (SPL) was recorded with BAHA when compared to conventional bone conduction hearing aids. Speech perception using short, everyday sentences applied in noise showed a reduction in the signal noise ratio of up to 11dB for both the conventional BAHA users and the BAHA CROS users in comparison to the unaided as well as the conventional hearing aid conditions.

These studies show that, in audiological terms, the BAHA is superior to conventional bone conduction devices. It is an excellent perspective for hearing rehabilitation in patients with unilateral deafness.