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  • Title: Determination of fundamental frequency and voice intensity in Iranian men and women aged between 18 and 45 years.
    Author: Izadi F, Mohseni R, Daneshi A, Sandughdar N.
    Journal: J Voice; 2012 May; 26(3):336-40. PubMed ID: 21889298.
    Abstract:
    OBJECTIVES: Acoustic measurements have become an essential aspect of voice assessment during the last few decades, and studies have established that normative data is necessary for acoustic analysis. In this study, two aspects of voice are reviewed. These two factors are fundamental frequency and intensity. This study was designed to establish the normal acoustic analysis parameters in normal Iranian adults. METHODS: In this cross-sectional study, 200 healthy randomly selected subjects (100 men and 100 women) were assessed. Data collection was carried out using the Studio Speech software and Laryngograph processor (Laryngograph Ltd, London, UK), type: PCLX at the Larynx and Voice Disorders Clinic of Rasoul-e-Akram Hospital under comfortable phonation. RESULTS: The value of fundamental frequency in reading was greater for women (170-240 Hz) than for men (107-140 Hz). Also, the value of intensity was greater for women (73.54-84.99 dB) than for men (72.40-86.03 dB). CONCLUSION: The present study developed the normal data for fundamental frequency and intensity in Iranian speakers aged between 18 and 45 years. We concluded, fundamental frequency has significant differences between men and women, but intensity has no significant difference between them.
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