Impact of Aberrant Acoustic Properties on the Perception of Sound Quality in Electrolarynx Speech

Autor/inn/en	Meltzner, Geoffrey S.; Hillman, Robert E.
Titel	Impact of Aberrant Acoustic Properties on the Perception of Sound Quality in Electrolarynx Speech
Quelle	In: Journal of Speech, Language, and Hearing Research, 48 (2005) 4, S.766-779 (14 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/1092-4388(2005/053)
Schlagwörter	Assistive Technology; Speech Impairments; Acoustics; Speech Evaluation; Intonation; Cancer; Surgery; Voice Disorders; Comparative Analysis; Verbal Communication + Suchen Sie Ihr Suchwort? Speech impairment; Speech handicap; Speech handicaps; Language handicps; Language impairments; Sprachbehinderung; Akustik; Carcinoma; Karzinom; Krebs (med); Krebserkrankung; Chirurgie; Stimmstörung
Abstract	A large percentage of patients who have undergone laryngectomy to treat advanced laryngeal cancer rely on an electrolarynx (EL) to communicate verbally. Although serviceable, EL speech is plagued by shortcomings in both sound quality and intelligibility. This study sought to better quantify the relative contributions of previously identified acoustic abnormalities to the perception of degraded quality in EL speech. Ten normal listeners evaluated the sound quality of EL speech tokens that had been acoustically enhanced by (a) increased low-frequency energy, (b) EL-noise reduction, and (c) fundamental frequency variation to mimic normal pitch intonation in relation to nonenhanced EL speech, normal speech, and normal monotonous speech (fundamental frequency variation removed). In comparing all possible combinations of token pairs, listeners were asked to identify which one of each pair sounded most like normal natural speech, and then to rate on a visual analog scale how different the chosen token was from normal speech. The results indicate that although EL speech can be most improved by removing the EL noise and providing proper pitch information, the resulting quality is still well below that of normal natural speech or even that of monotonous natural speech. This suggests that, in addition to the widely acknowledged acoustic abnormalities examined in this investigation, there are other attributes that contribute significantly to the unnatural quality of EL speech. Such additional factors need to be clearly identified and remedied before EL speech can be made to more closely approximate the sound quality of normal natural speech. (Contains 3 figures and 3 tables.) (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10