Survey on Quality and Intelligibility Offered by Speech Enhancement Algorithms

Improvement in quality as well as intelligibility is the prime requirement of speech enhancement devices such as hearing aids. Understanding speech signals can be very difficult for hearing impaired as well as normal hearing listeners especially when background noise is present. Majority of the traditional speech enhancement algorithms have reported improvement in quality but not necessarily intelligibility. This review of speech enhancement is based on four different algorithms involving various techniques and presents theoretical comparative analysis in terms of quality and intelligibility.