Fred Apoux

Research Scientist (Staff)

Speech can be presented as a summation of frequency bands with amplitude-modulated signals. Each frequency band consists of a fine structure and a temporal envelope. According to this view, listeners can rely on three acoustic cues to understand speech: spectral, fine structure and temporal. My researches focus on the mechanisms involved in the processing of these cues by the normal and the impaired ears. A first objective of my researches is to determine which of the three acoustic cues is/are most important for speech recognition, A second objective is to determine how these cues are affected by the presence of external or internal (e.g. hearing impairment) noise. The third objective is to propose improved and/or innovative speech processing strategies for hearing aids and cochlear implants susceptible to attenuate or eliminate the effects of these different types of noise. Currently, my research interests focus on the role of peripheral filtering in the unmasking of speech. More specifically, I am interested in how the auditory system selects and combines the output of auditory filters to reconstruct an interpretable representation of the speech signal.

Areas of Expertise
  • Temporal processing by the normal and the impaired ear
  • Effects of external/internal noise on speech & understanding
  • Peripheral auditory filtering
  • Signal processing strategies
  • PhD, Cognitive Psychology, Paris Decartes University, France

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(614) 688-9665
915 Olentangy River Rd
Columbus, OH 43212