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Speech is the most preferred means of communication among humans. There is a growing demand for human-machine interactive systems to develop many user applications in the present era of Internet-enabled handheld devices like smartphones. Speech is the most natural form of human communication. Speech processing is the study of speech signals and the processing methods of these signals. Consequently, the pattern classification systems will be more user-friendly by using speech biometrics. The frontend signal analysis is an essential module in the pattern classifiers. In this stage, generally, the input speech signal is analyzed and processed for extracting relevant information and suppressing the redundancies in the raw signal.