Speyer Renée, Wieneke George H, van Wijck-Warnaar Ida, Dejonckere Philippe H
Institute of Phoniatrics, University Medical Center Utrecht, Utrecht, The Netherlands.
J Voice. 2003 Dec;17(4):544-56. doi: 10.1067/s0892-1997(03)00079-1.
In a group of chronically dysphonic patients, a voice range profile, or phonetogram, was recorded before and after receiving voice therapy and again 3 months later. The voice range profiles took a wide variety of shapes. Therefore, only measures that did not depend on a smooth contour could be used to describe changes before and after therapy. The main effect of voice therapy was an enlargement on the side of low frequency and low intensity.
