title: Notched-noise embedded frequency specific chirps for objective audiometry using auditory brainstem responses.
abstract: It has been shown recently that chirp-evoked auditory brainstem responses (ABRs) show better performance than click stimulations, especially at low intensity levels. In this paper we present the development, test, and evaluation of a series of notched-noise embedded frequency specific chirps. ABRs were collected in healthy young control subjects using the developed stimuli. Results of the analysis of the corresponding ABRs using a time-scale phase synchronization stability (PSS) measure are also reported. The resultant wave V amplitude and latency measures showed a similar behavior as for values reported in literature. The PSS of frequency specific chirp-evoked ABRs reflected the presence of the wave V for all stimulation intensities. The scales that resulted in higher PSS are in line with previous findings, where ABRs evoked by broadband chirps were analyzed, and which stated that low frequency channels are better for the recognition and analysis of chirp-evoked ABRs. We conclude that the development and test of the series of notched-noise embedded frequency specific chirps allowed the assessment of frequency specific ABRs, showing an identifiable wave V for different intensity levels. Future work may include the development of a faster automatic recognition scheme for these frequency specific ABRs.
authors.affiliation: Systems Neuroscience and Neurotechnology Unit and ; Key Numerics Medical Engineering GbR, Saarbruecken, Germany.
authors.forename: Farah I
authors.initials: FI
authors.lastname: Corona-Strauss
authors.affiliation: Department of Otorhinolaryngology, Saarland University Hospital, Homburg;
authors.forename: Bernhard
authors.initials: B
authors.lastname: Schick
authors.affiliation: Systems Neuroscience and Neurotechnology Unit and ; Department of Otorhinolaryngology, Mannheim University Hospital, Mannheim;
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Delb
authors.affiliation: Systems Neuroscience and Neurotechnology Unit and ; Leibniz Institute for New Materials, Saarbruecken, Germany; ; Key Numerics Medical Engineering GbR, Saarbruecken, Germany.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Strauss
keywords: auditory brainstem responses; chirps; frequency-specific ABRs; phase synchronization; single sweeps; wavelet transform.