Acoustic Technique in the Diagnosis of Voice Disorders

Download or read book Acoustic Technique in the Diagnosis of Voice Disorders written by Christina Kulinski and published by . This book was released on 2004 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital imaging and signal analysis are extremely useful in the diagnosis and study of voice disorders. When a microphone captures the voice, an acoustic signal can be produced and stored on a computer. The distinct signal pattern is an excellent indication of the quality of voice, and can be used to compare deviant voices with healthy voices. This study focuses on a computer analysis of laryngeal function-specifically on the acoustic analysis of vocal fold vibration in normal subjects and patients with specific voice disorders. The vocal pattern of each patient is analyzed using the MatLab computer program, producing a graph showing the unique vocal pattern for each patient. The acoustic recording of the vocal signal is observed, along with the analysis using fast Fourier Transform and short Fourier Transform. The patterns of many voice disorders are compared, including those in patients with vocal fold scarring and vocal fold cysts. A comparison is then made between the patterns of patients with a "normal" voice and those with the specified disorders. A brief introduction to the laryngeal image based analysis of glottal waveform is included, and compared with acoustic analysis results.