Joshua Michael Alexander PhD, CCC-A

Joshua M. Alexander received his Ph.D. in Audiology (psychoacoustics) and post-doctoral training in speech perception at the University of Wisconsin- Madison. Before coming to Purdue, he completed both clinical and post-doctoral fellowships at Boys Town National Research Hospital in Omaha, Nebraska. Research interests focus on auditory processes contributing to speech perception deficits in hearing-impaired listeners and signal processing techniques to overcome them.

The framework guiding the discovery process involves the interplay of three key components: basic research (speech perception and psychoacoustic deficits); applied research (digital signal processing algorithms intended for hearing aids and automatic speech recognition); and modeling. Ongoing efforts encompass two main lines of research: understanding existing technology and developing new technology. Recently, the effort has been directed towards developing auditory nerve models that quantify information in a speech signal to help explain the effects that different signal processing strategies have on speech perception as a function of hearing loss so that better solutions can be devised.