In many applications 'pitch extraction' and larynx period measurement are synonymous but in work for the profoundly hearing impaired, and also when detailed information concerning prosodic contrasts is needed, the analysis in normal speech of regularly periodic and also aperiodic laryngeal excitation are essential. The second important need relates to the requirement for period to period accuracy even in conditions of reverberation and ambient noise, and third to the ability to process both normal and pathological speech. We have concentrated on the real-time use of MLP ('neural-net') and peak-picking methods implemented on wearable prostheses, and these are compared with electro-laryngographic techniques and with cepstral processing. Our emphasis is on algorithmic efficacy for both quiet and noisy speech. The developments described come from a programme of work aimed at the real-time analysis of the voice excitation components in speech, in association with the STRIDE project in the EC TIDE programme.
Keywords: Fundamental Period Detection, Hearing Aids, Speech Signal Processing
Bibliographic reference. Wei, Jianing / Howells, David / Faulkner, Andrew / Fourcin, Adrian (1993): "Larynx period detection methods in speech pattern hearing AIDS", In EUROSPEECH'93, 2037-2040.