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ABSTRACT The respiratory system is considered the power source for voice production. Adequate control of lung volume and respiratory muscle activity during expiration is crucial for the regulation of subglottal pressure (Hixon, Goldman and Mead, 1973), which controls a variety of parameters related to voice production such as airflow, glottal area, fundamental frequency, and sound pressure. The degradation of the function of respiratory system can significantly impact the ability to generate adequate ventilation for life purposes and subglottal air pressure for voice production. Based on this physiology of voice production and available resource in Indian scenario, the study was aimed at investigating the voice characteristics of individuals with respiratory issues. 10 female participants each with respiratory issues (asthma, chronic bronchitis, pleuritis, chronic coughing and chronic sneezing) for the experimental group and 10 female participants without any respiratory issues formed the control group. All participants were in the age range of 21 to 35 years. A questionnaire was used to select the participants for the study which included information on lifestyle, vocal habits and the symptoms exhibited in terms of voice. From the selected participants, voice samples involving tasks such as phonation, reading and spontaneous speech for a given topic were recorded. Different parameters such as frequency, amplitude and noise measures using the PRAAT Software were obtained. Statistical analysis involved using Shapiro Wilk’s test for determining normal distribution. With the result of p>0.05 from Shapiro Wilk’s test, normality was confirmed and parametric independent two-sample t-test was used to check the presence of significant difference between the two subject groups. The result revealed p>0.05, indicating no significant difference between the two groups. Hence it is concluded that the respiratory issues were not considerable enough to reveal changes in the voice characteristics of individuals in experimental and control group.
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