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H‐Index: A new measure of glottal efficiency for the pathologic voice
Author(s) -
Shoji Kazuhiko,
Regenbogen Elliot,
Yu Jong Daw,
Blaugrund Stanley M.
Publication year - 1992
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1288/00005537-199210000-00005
Subject(s) - measure (data warehouse) , acoustics , range (aeronautics) , envelope (radar) , glottis , vocal tract , mathematics , speech recognition , computer science , medicine , telecommunications , larynx , physics , materials science , anatomy , radar , database , composite material
Taking advantage of the extended dynamic range of digital analysis of voice the H‐Index represents the first proposed acoustical measure of glottal efficiency. “Hi” /hai/ was chosen to evaluate glottal efficiency since it provides an excellent test of glottal transformation from voiceless to voiced sound energy, the upper vocal tract having a neutral effect. Fifteen individuals with normal voices and 30 patients with hoarse voices were asked to say “hi.” The power ratio of /h/ to /a/ was calculated from peak power of each measure from the power envelope. Voice quality had a highly significant effect on measured values ( P <.001). A high degree of correlation ( P <.001) was found with the AC/DC ratio, a standard aerodynamic measure of glottal efficiency. The results indicate that the H‐Index represents an excellent measure of glottal efficiency, obviating the need of invasive techniques or expensive, highly specialized equipment.