Abstract
Quantitative analysis of human voice has been subject of interest and the subject gained momentum when human voice was identified as a modality for human authentication and identification. The main organ responsible for production of sound is larynx and the structure of larynx along with its physical properties and modes of vibration determine the nature and quality of sound produced. There has been lot of work from the point of view of fundamental frequency of sound and its characteristics. With the introduction of additional applications of human voice interest grew in other characteristics of sound and possibility of extracting useful features from human voice. We conducted a study using Fast Fourier Transform (FFT) technique to analyze human voice to identify different frequencies present in the voice with their relative proportion while pronouncing selected words like numbers. Details of findings are presented
Highlights
The acoustic structure of human voice contains a wealth of information related to the speaker's identity and state of emotional which can be retrieved with accuracy [1,2,3]
Deeper investigations led to quantitative analysis of voice and it gained momentum when human voice was identified as a tool for human authentication and identification that resulted in brisk activity in this area[4]
This work demonstrated that the Fast Fourier Transform (FFT) is successfully useful in finding out the fundamental frequency of voice and obtaining the amplitude frequency spectrum of human voice from which power spectrum can be obtained
Summary
The acoustic structure of human voice contains a wealth of information related to the speaker's identity and state of emotional which can be retrieved with accuracy [1,2,3]. Human voice related study in its initial phases concentrated mainly on the quality of sound from the point of view of audible quality and phonetic significance [2,3,4]. There has been lot of work from the point of view of fundamental frequency of sound. Minoru Hirano et al.[5] showed that three laryngeal muscles and their activity governs intensity, fundamental frequency and Phonation of sound. Role of frequency distribution [6] is investigation on sound produced by birds is reported by birds by Mohammad Moaviyah Moghal and interesting results are presented in relation to syrinxp[7]
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