ACOUSTIC AND PERCEPTUAL MEASURES OF VOICE PRE AND POST PHONOMICROSURGERY

Abstract

Objective:

To evaluate acoustic and perceptual outcomes of voice pre and post phonomicrosurgery for vocal fold polyp. To evaluate and compare the videostroboscopic measurements with that of acoustic and perceptual analysis of voice.

Material & Methods:

A total of seven (Male=4, Female=3) subjects who were diagnosed to have vocal cord polyp were taken for the study at Dr. Chandrasekhar Institute of Speech and Hearing, Bangalore, India from January 2012 to June 2012. The study was carried out in three phases. In the first phase pre-operative measures were taken, 2-4 days before surgery, which involved detailed case history, videostroboscopic evaluation, acoustic evaluation using PRAAT software and perceptual evaluation using GRBAS scale. The second phase involved the surgical excision of the vocal polyp under general anaesthesia. The third phase involved the post-operative measures taken after 2 weeks of surgery which involved videostroboscopic evaluation, acoustic evaluation, perceptual evaluation and patient self rating scale.

Results & Conclusion:

The acoustic and perceptual parameters of voice showed improvement at 2 weeks post-surgery. There was tremendous improvement in glottic closure, mucosal wave, regularity of the vocal folds, periodicity of the vocal folds, vocal fold edge and the amplitude of the vocal folds post-operatively in all the subjects of our study.

Keywords: Acoustic, Phonomicrosurgery, Videostroboscopy, Vocal polyp