Developmental changes of spectral parameter in children speech

The objective of this study is to analyze the developmental changes in the speech of children and adult. We quantified speech in terms of the mean power across 10 frequency bins between 0-2000 Hz in the population of 90 children (4-8 years old) and 27 adults. We found that with age, the harmonic structures in the speech increases, as the power spectra of adult is more distributed and has peaks at higher frequency bins than the younger children. To further support our findings, we have performed classification by different classification techniques and found the significant differences in the power spectra's of children and adults. This result can be used as a database for Indian children for doing comparative studies to find out speech abnormalities in the children with speech, language or brain disorder.