4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

Enhancement of Alaryngeal Speech by Adaptive Filtering

Carol Y. Espy-Wilson, Venkatesh R. Chari, Caroline B. Huang

ECS Engineering Department, Boston University, Boston, MA, USA

Artificial larynxes enable adequate communication for people who are unable to use their larynxes. However, the resulting speech has an unnatural quality and is significantly less intelligible than normal speech. One of the major problems with the widely-used Transcutaneous Artificial Larynx (TAL) is the presence of a steady background noise due to the leakage of acoustic energy. In the present study, a novel adaptive filtering architecture was designed and implemented for the purpose of removing the background noise. Perceptual tests were conducted to assess speech from 2 laryngectomees and 2 normal speakers using the Servox TAL, before and after processing by the adaptive filter. Results from the perceptual tests indicate a clear preference for the processed speech and spectral analysis of the reveals a significant reduction in the background source radiation.

Full Paper

Bibliographic reference.  Espy-Wilson, Carol Y. / Chari, Venkatesh R. / Huang, Caroline B. (1996): "Enhancement of alaryngeal speech by adaptive filtering", In ICSLP-1996, 764-767.