Speech evoked potentials: from the laboratory to the clinic.
Speech-evoked auditory event-related potentials (ERPs) provide insight into the neural mechanisms underlying speech processing. For this reason, ERPs are of great value to hearing scientists and audiologists. This article will provide an overview of ERPs frequently used to examine the processing of speech and other sound stimuli. These ERPs include the P1-N1-P2 complex, acoustic change complex, mismatch negativity, and P3 responses. In addition, we focus on the application of these speech-evoked potentials for the assessment of (1) the effects of hearing loss on the neural encoding of speech allowing for behavioral detection and discrimination; (2) improvements in the neural processing of speech with amplification (hearing aids, cochlear implants); and (3) the impact of auditory training on the neural processing of speech. Studies in these three areas are reviewed and implications for audiologists are discussed.
Martin
Brett A
BA
Program in Speech and Hearing Sciences, Graduate Center, City University of New York, New York 10016, USA. bmartin@gc.cuny.edu
Tremblay
Kelly L
KL
Korczak
Peggy
P
D001288:Attention / Q000502:physiology; D001303:Auditory Cortex / Q000503:physiopathology; D001306:Auditory Pathways / Q000503:physiopathology; D003054:Cochlear Implants; D003265:Contingent Negative Variation; D004569:Electroencephalography; D018913:Event-Related Potentials, P300 / Q000502:physiology; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D006310:Hearing Aids; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis / Q000503:physiopathology* / Q000534:rehabilitation; D006801:Humans; D010700:Phonetics; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography; D013061:Speech Acoustics; D013067:Speech Perception / Q000502:physiology*