font size text Times 16 Acoustic Signal Types Times 10 (Pathology types will be displayed in the main window, press a number key to set the type) Times 12 Times 14 %%Type I - Stable \& Harmonic% \s{(press 1)} Times 12 - Stable signal for longer than two seconds, and Times 12 - Clear harmonics up to at least 1000 Hz Times 12 Times 14 %%Type II - Stable \& At least one harmonic% \s{(press 2)} Times 12 - Stable signal for longer than two seconds, and Times 12 - At least one stable harmonic at the fundamental frequency for longer than two seconds Times 12 Times 14 %%Type III - Unstable or Partly harmonic% \s{(press 3)} Times 12 - No stable signal for longer than two seconds, or Times 12 - Harmonics in only part of the sample (for longer than 1 second) Times 12 Times 14 %%Type IV - Barely harmonic% \s{(press 4)} Times 12 - No or only short-term detectable harmonics (for shorter than 1 second) Times 12 Times 12 %%Table of the relation between the four types of acoustic signal typing% Times 12 %%and the perceptual judgment of overall voice quality for 39 speakers% Times 12 %%(converted to percentages).% Courier 12 | Perceptual judgment of overall voice quality | Courier 12 | Good Reasonable Poor | Courier 12 | Type I 70\% 40\% 0\% | Courier 12 | Type II 45\% 45\% 10\% | Courier 12 | Type III 20\% 35\% 45\% | Courier 12 | Type IV 0\% 25\% 75\% | Times 12 Helvetica 10 References: Helvetica 10 \bu Van As, C.J. (##2001#), %%Tracheoesophageal Speech. A Multidimensional Assessment of Voice Quality%, Helvetica 10 Ph.D.-thesis, University of Amsterdam, 209 pag. Helvetica 10 \bu van As-Brooks, C.J., Koopmans-van Beinum, F.J., Pols, L.C.W., and Hilgers, F.J.M. (##2006#), Helvetica 10 %%Acoustic Signal Typing for Evaluation of Voice Quality in Tracheoesophageal Speech% Helvetica 10 Journal of Voice, Volume ##20# (3), p355-368 Helvetica 10 \bu Van As, C.J. (##2008#), %%Acoustic analyses of postlaryngectomy voice and their perceptual relevance% Helvetica 10 Invitational Round Table "Evidence-based Voice and Speech Rehabilitation in Head and Neck Cancer", p8-14 Helvetica 10