English

Abstract

Wireless communication has become increasingly popular in recent years due to its mobility, portability and efficient service. Quality Voice Communication is the basic need of all such devices. Due to the significant spectrum demand, the bandwidth allocated to Professional Radio devices is decreasing. This results in lowering voice/ speech quality. Due to limited bandwidth, the design of Radio is changing. The main change is shifting from Analogue signal processing to Digital signal processing of speech and radio signals. The conversion of analogue-natured speech to digital form itself creates loss and faithfulness. Such Radio includes a voice coder for analogue to digital conversion of speech. Human spoken language, speaker (male or female), and pronunciation play an essential role in direct voice and Radio communication. It is the primary object which decides the design of low bandwidth coder. This paper deals with Marathi language characteristics and the interdependence of language constructs that affects voice/speech quality. In this paper, we extracted features of the Marathi language using PRAAT software and analyzed its constructs using statistical tools. The actual testing on Radio is carried out. The speech quality observed during such testing is correlated with statistical results. It is shown that the standard deviation in pitch and formants in male speech is less (average 35%) compared to the standard deviation in pitch and formants in female speech. This results in lowering the quality of male speech compared to female speech. It is also shown that some vowels and combinations of certain vowels and consonants produce poor speech quality compared to others.