title: Signal type and signal-to-noise ratio interact to affect cortical auditory evoked potentials.
abstract: Use of speech signals and background noise is emerging in cortical auditory evoked potential (CAEP) studies; however, the interaction between signal type and noise level remains unclear. Two experiments determined the interaction between signal type and signal-to-noise ratio (SNR) on CAEPs. Three signals (syllable /ba/, 1000-Hz tone, and the /ba/ envelope with 1000-Hz fine structure) with varying SNRs were used in two experiments, demonstrating signal-by-SNR interactions due to both envelope and spectral characteristics. When using real-world stimuli such as speech to evoke CAEPs, temporal and spectral complexity leads to differences with traditional tonal stimuli, especially when presented in background noise.
authors: National Center for Rehabilitative Auditory Research, Veterans Affairs Portland Health Care System, Portland, Oregon 97239, USA Curtis.Billings2@va.gov, Leslie.Grush@va.gov.
authors: Curtis J
authors: CJ
authors: Billings
authors: National Center for Rehabilitative Auditory Research, Veterans Affairs Portland Health Care System, Portland, Oregon 97239, USA Curtis.Billings2@va.gov, Leslie.Grush@va.gov.
authors: Leslie D
authors: LD
authors: Grush
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001303:Auditory Cortex / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009622:Noise; D059629:Signal-To-Noise Ratio; D013067:Speech Perception