Significance of Acoustic Parameters Obtained from Sound Spectrogram in Determining the Phonatory Function of the Patients with Vocal Nodule

Korean Journal of Otorhinolaryngology-Head and Neck Surgery > Volume 32(5); 1989 > Article

Korean Journal of Otorhinolaryngology-Head and Neck Surgery 1989;32(5): 860-6.

Kwang Moon Kim, MD¹, Gill Ryoung Kim, MD¹, Hong Shik Choi, MD¹, Kyung Shik Suk, MD¹, Jong Chul Bag, MS², and Soo Ki Hong, BS²

1;Department of Otorhinolaryngology, Yonsei University College of Medicine, 2;National Institute of Scientific Investigation, Korea

성대 결절 수술 전후 음성의 음향분석적 고찰

김광문¹ · 김기령¹ · 최홍식¹ · 서경식¹ · 박종철² · 홍수기²

연세대학교 의과대학 이비인후과학교실1;국립과학수사연구소 성문연구실2;

ABSTRACT

To evaluate the voice of 14 patients with vocal nodule before and after laryngomicrosurgery, the sound spectrograms of the Korean vowel /e/ were analysed. Voice recordings were made at preoperative day and weekly follow up recordings were made for 1 month after the surgery. After analysing 3 selected parameters, we concluded that the valuable parameter for measuring the voice improvement was the 'extent of fundamental frequency fluctuation'. The normalization of this parameter occurred between the 3rd and 4th postoperative week. The 'relative level of high frequency components' and 'relative level of noise' were not valuable parameters for measuring the voice improvement of patients with vocal nodule.