Speech and Language Technology for Disabled Persons
The rehabilitation of oesophageal and tracheoesophageal speech is still a challenge both in surgery and speech signal processing. This study especially deals with the alaryngeal female voice problem. Even after an efficient medical postlaryngectomy rehabilitation, the female speech signal is inevitably characterized by a high pitch period which is still perceived as a real handicap. As a matter of fact an investigation procedure is developed to appraise the pertinence of signal processing methods which would achieve an enhancement of the pitch, and of speech harmonic structure, whilst preserving the spectral envelope. Through a primary set of subjective listening tests, such methods, compared to speech synthesis using a synthetic excitation, are likely to give good results regarding voicing, intonation and melody characters.
Bibliographic reference. Crestel, J. / Guitton, M. (1993): "Alaryngeal female speech: an approach for the restoration of gender", In SLTDP-93, 63-66.