title: Assessment of low-frequency hearing with narrow-band chirp-evoked 40-Hz sinusoidal auditory steady-state response.
abstract: Objective To determine the clinical utility of narrow-band chirp-evoked 40-Hz sinusoidal auditory steady state responses (s-ASSR) in the assessment of low-frequency hearing in noisy participants. Design Tone bursts and narrow-band chirps were used to respectively evoke auditory brainstem responses (tb-ABR) and 40-Hz s-ASSR thresholds with the Kalman-weighted filtering technique and were compared to behavioral thresholds at 500, 2000, and 4000 Hz. A repeated measure ANOVA and post-hoc t-tests, and simple regression analyses were performed for each of the three stimulus frequencies. Study sample Thirty young adults aged 18-25 with normal hearing participated in this study. Results When 4000 equivalent response averages were used, the range of mean s-ASSR thresholds from 500, 2000, and 4000 Hz were 17-22 dB lower (better) than when 2000 averages were used. The range of mean tb-ABR thresholds were lower by 11-15 dB for 2000 and 4000 Hz when twice as many equivalent response averages were used, while mean tb-ABR thresholds for 500 Hz were indistinguishable regardless of additional response averaging. Conclusion Narrow-band chirp-evoked 40-Hz s-ASSR requires a ∼15 dB smaller correction factor than tb-ABR for estimating low-frequency auditory threshold in noisy participants when adequate response averaging is used.
authors.affiliation: a Communication Sciences and Disorders, Missouri State University , Springfield , Missouri , USA .|c Department of Otolaryngology , Washington University School of Medicine in Saint Louis , Saint Louis , Missouri , USA.
authors.forename: Uzma S
authors.initials: US
authors.lastname: Wilson
authors.affiliation: a Communication Sciences and Disorders, Missouri State University , Springfield , Missouri , USA .
authors.forename: Wafaa A
authors.initials: WA
authors.lastname: Kaf
authors.affiliation: b Communication Sciences and Disorders, Florida Atlantic University , Boca Raton , Florida , USA , and.
authors.forename: Ali A
authors.initials: AA
authors.lastname: Danesh
authors.affiliation: c Department of Otolaryngology , Washington University School of Medicine in Saint Louis , Saint Louis , Missouri , USA.
authors.forename: Jeffery T
authors.initials: JT
authors.lastname: Lichtenhan
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D003463:Cues; D004569:Electroencephalography; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006801:Humans; D008297:Male; D009622:Noise / Q000009:adverse effects; D046709:Pattern Recognition, Physiological; D010470:Perceptual Masking; D010898:Pitch Perception; D011237:Predictive Value of Tests; D055815:Young Adult
keywords: Auditory steady-state response; Kalman-weighted filtering; auditory brainstem response