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Vocal acoustic measures of asymptomatic Filipino young adults at a private tertiary hospital in Quezon City - A pilot study.


Kirt Areis E. Delovino,
Ray  U. Casile,
Frederick Y. Hawson

Related Institution

Department of Otorhinolaryngology Head and Neck Surgery - St. Luke's Medical Center

Publication Information

Publication Type
Publication Sub Type
Journal Article, Original
Philippine Journal of Otolaryngology Head and Neck Surgery
Publication Date
July-December 2012


OBJECTIVES: To describe the vocal acoustic measures of non-smoking Filipino young adults without voice complaints at a private tertiary hospital in Quezon City; to determine if our baseline values are distributed normally and comparable to data in similar studies done abroad; and to recommend normative voice parameters which may be used as baseline date in our institution and for comparison in future studies.

Design: Cross-sectional study
Setting: Private tertiary hospital
Participants: A total of 70 subjects were recruited at random

RESULTS: Values extracted for f0, Jitter dB, Shimmer %, Shimmer dB and NHR showed normal distribution of results. The average vocal acoustic values found in the present study for male voices producing the vowel /a/ were fo = 130.6 ± 13.65Hz, jitter = 0.0.46 % ± 0.184, jitter dB: 37.62dB ± 16.664, shimmer %= 0.23%, shimmer dB=0.23 ± 0.67 and NHR = 0.13 ± 0.010. The average values found for female voices, producing the vowel /a/ were fo = 218.38 ± 26.192Hz, jitter = 0.87% ± 0.61, jitter dB: 34.82 ± 22.5, shimmer %= 2.72 ± 1.07 shimmer dB=0.23db ± 0.67 and NHR = 0.12dB ± 0.016. Values retrieved from this study show similar trends with other papers abroad.

CONCLUSION: Voice acoustic systems are composed of different recording criteria, recording instrumentations and algorithms which primarily cause the differences in the results obtained in various studies, thus, precluding a single normalization. Following international recommendations for individual normalization per institution, we have obtained our own values. Our data was comparable to the results of other international studies. However, further investigation is recommended in areas where possibilities of interdialectic variation may produce an effect on the outcome of the study.


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Physical Location

LocationLocation CodeAvailable FormatAvailability
Philippine Council for Health Research and Development Library Box No. 64 Fulltext Print Format
Philippine Council for Health Research and Development Library Fulltext pdf (Request Document)
Philippine Society of Otolaryngology-Head and Neck Surgery Abstract Print Format

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