Enhancement of alaryngeal speech by adaptive filtering
Carol Espy-Wilson, Venkatesh R. Chari, Caroline B. Huang · 4th International Conference on Spoken Language Processing (ICSLP 1996) · 1996
Articial larynxes enable adequate communication for people who are unable to use their larynxes.However, the resulting speech has an unnatural quality and is signicantly less intelligible than normal speech.One of the major problems with the widely-used Transcutaneous Articial Larynx (TAL) is the presence of a steady background noise due to the leakage of acoustic energy.In the present study, a novel adaptive ltering 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 T AL, before and after processing by the adaptive lter.Results from the perceptual tests indicate a clear preference for the processed speech and spectral analysis of the reveals a signicant reduction in the background source radiation.