tailieunhanh - Báo cáo hóa học: "Research Article A First Comparative Study of Oesophageal and Voice Prosthesis Speech Production"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A First Comparative Study of Oesophageal and Voice Prosthesis Speech Production | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 821304 6 pages doi 2009 821304 Research Article A First Comparative Study of Oesophageal and Voice Prosthesis Speech Production Massimiliana Carello1 and Mauro Magnano2 1 Dipartimento di Meccanica Politecnico di Torino Corso Duca degli Abruzzi 24 10129 Torino Italy 2 Ospedali Riuniti di Pinerolo . TO3 Via Brigata Cagliari 39 10064 Pinerolo Torino Italy Correspondence should be addressed to Massimiliana Carello Received 31 October 2008 Revised 2 March 2009 Accepted 30 April 2009 Recommended by Juan I. Godino-Llorente The purpose of this work is to evaluate and to compare the acoustic properties of oesophageal voice and voice prosthesis speech production. A group of 14 Italian laryngectomized patients were considered 7 with oesophageal voice and 7 with tracheoesophageal voice with phonatory valve . For each patient the spectrogram obtained with the phonation of vowel a frequency intensity jitter shimmer noise to harmonic ratio and the maximum phonation time were recorded and analyzed. For the patients with the valve the tracheostoma pressure at the time of phonation was measured in order to obtain important information about the in vivo pressure necessary to open the phonatory valve to enable speech. Copyright 2009 M. Carello and M. Magnano. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Laryngeal cancer is the second most common upper aerodigestive cancer in particular it causes pain dysphagia and impedes speech breathing and social interactions. The management of advanced cancers often includes radical surgery such as a total laryngectomy which involves the removal of the vocal cords and as a consequence the loss of voice. Total laryngectomy .