Advanced Search
DSpace@MIT

Development, perceptual evaluation, and acoustic analysis of amplitude-based F0 control in Electrolarynx speech

Research and Teaching Output of the MIT Community

Show simple item record

dc.contributor.advisor Robert E. Hillman and Kenneth N. Stevens. en_US
dc.contributor.author Saikachi, Yoko en_US
dc.contributor.other Harvard University--MIT Division of Health Sciences and Technology. en_US
dc.date.accessioned 2010-04-28T17:17:25Z
dc.date.available 2010-04-28T17:17:25Z
dc.date.issued 2009 en_US
dc.identifier.uri http://hdl.handle.net/1721.1/54667
dc.description Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2009. en_US
dc.description "September 2009." Cataloged from PDF version of thesis. en_US
dc.description Includes bibliographical references (p. 120-126). en_US
dc.description.abstract An Electrolarynx (EL) is a battery-powered device that produces a sound that can be used to acoustically excite the vocal tract as a substitute for laryngeal voice production. ELs provide laryngectomy patients with the basic capability to communicate, but current EL devices produce a mechanical speech quality which has been largely attributed to the lack of natural fundamental frequency (F0) variation. In order to improve the quality of EL speech, the present study aimed to develop and evaluate an automatic F0 control scheme, in which F0 was modulated based on variations in the root-mean-squared (RMS) amplitude of the EL speech signal. Recordings of declarative sentences produced by two male subjects before and after total laryngectomy were used to develop procedures for calculating F0 contours for EL speech, and perceptual experiments and acoustic analyses were conducted to examine the impact of F0 modulation on the quality and prosodic function of the EL speech. The results of perceptual experiments showed that modulating the F0 of EL speech using a linear relationship between amplitude and frequency made it significantly more natural sounding than EL speech with constant F0, but also revealed some limitations in terms of communicating linguistic contrasts (distinction between question vs. statement and location of contrastive stress). Results are interpreted in relation to the acoustic characteristics of F0 modified EL speech and discussed in terms of their clinical implications and suggestion for improved algorithms of F0 control in EL speech. en_US
dc.description.statementofresponsibility by Yoko Saikachi. en_US
dc.format.extent 126 p. en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. en_US
dc.rights.uri http://dspace.mit.edu/handle/1721.1/7582 en_US
dc.subject Harvard University--MIT Division of Health Sciences and Technology. en_US
dc.title Development, perceptual evaluation, and acoustic analysis of amplitude-based F0 control in Electrolarynx speech en_US
dc.type Thesis en_US
dc.description.degree Ph.D. en_US
dc.contributor.department Harvard University--MIT Division of Health Sciences and Technology. en_US
dc.identifier.oclc 607320598 en_US


Files in this item

Name Size Format Description
607320598.pdf 15.34Mb PDF Preview, non-printable (open to all)
607320598-MIT.pdf 15.70Mb PDF Full printable version (MIT only)

This item appears in the following Collection(s)

Show simple item record

MIT-Mirage