Abstract
Objective: The effects of rate on auditory-evoked potentials (AEP) to short noise gaps (12 ms) recorded at high sampling rates using wide-band filters were investigated. Design: Auditory brainstem (ABR), middle latency (MLR), late latency (LLR) and steady-state (ASSR) responses were simultaneously recorded in adult subjects at four gap rates (0.5, 1, 5 and 40 Hz). Major components (V, Na, Pa, Nb, Pb, N1 and P2) were identified at each rate and analysed for latency/amplitude characteristics. Gap responses at 40 Hz were recovered from Quasi-ASSRs (QASSR) using the CLAD deconvolution method. Study Sample: Fourteen right ears of young normal hearing subjects were tested. Results: All major components were present in all subjects at 1 Hz. P1 (P50) appeared as a low-pass filtered component of Pa and Pb waves. At higher rates, N1 and P2 disappeared completely while major ABR-MLR components were identified. Peak latencies were mostly determined by noise onsets slightly delayed by offset responses. Conclusions: Major AEP components can be recorded to short gaps at 1 Hz using high sampling rates and wide-band filters. At higher rates, only ABR and MLRs can be recorded. Such simultaneous recordings may provide a complete assessment of temporal resolution and processing at different levels of auditory pathways.
Original language | English (US) |
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Pages (from-to) | 399-406 |
Number of pages | 8 |
Journal | International Journal of Audiology |
Volume | 57 |
Issue number | 6 |
DOIs | |
State | Published - Jun 3 2018 |
Keywords
- Gaps in noise
- auditory brainstem response
- auditory late latency response
- auditory middle latency response
- auditory steady-state response
- auditory-evoked potential
- continuous loop averaging deconvolution
ASJC Scopus subject areas
- Language and Linguistics
- Linguistics and Language
- Speech and Hearing