Aided Electrophysiology Using Direct Audio Input: Effects of Amplification and Absolute Signal Level

Overview

Journal Am J Audiol

Specialty Otorhinolaryngology

Date 2016 Mar 9

PMID 26953543

Citations 2

Authors

Ingyu Chun

Curtis J Billings

Christi W Miller

Kelly L Tremblay

Affiliations

Soon will be listed here.

Abstract

Purpose: This study investigated (a) the effect of amplification on cortical auditory evoked potentials (CAEPs) at different signal levels when signal-to-noise ratios (SNRs) were equated between unaided and aided conditions, and (b) the effect of absolute signal level on aided CAEPs when SNR was held constant.

Method: CAEPs were recorded from 13 young adults with normal hearing. A 1000-Hz pure tone was presented in unaided and aided conditions with a linear analog hearing aid. Direct audio input was used, allowing recorded hearing aid noise floor to be added to unaided conditions to equate SNRs between conditions. An additional stimulus was created through scaling the noise floor to study the effect of signal level.

Results: Amplification resulted in delayed N1 and P2 peak latencies relative to the unaided condition. An effect of absolute signal level (when SNR was constant) was present for aided CAEP area measures, such that larger area measures were found at higher levels.

Conclusion: Results of this study further demonstrate that factors in addition to SNR must also be considered before CAEPs can be used to clinically to measure aided thresholds.

Citing Articles

Aging Effects on Cortical Responses to Tones and Speech in Adult Cochlear-Implant Users.

Xie Z, Stakhovskaya O, Goupell M, Anderson S J Assoc Res Otolaryngol. 2021; 22(6):719-740.

PMID: 34231111 PMC: 8599602. DOI: 10.1007/s10162-021-00804-4.

A potential neurophysiological correlate of electric-acoustic pitch matching in adult cochlear implant users: Pilot data.

Tan C, Martin B, Svirsky M Cochlear Implants Int. 2018; 19(4):198-209.

PMID: 29508662 PMC: 6123823. DOI: 10.1080/14670100.2018.1442126.

References

Souza P, Jenstad L, Folino R . Using multichannel wide-dynamic range compression in severely hearing-impaired listeners: effects on speech recognition and quality. Ear Hear. 2005; 26(2):120-31. DOI: 10.1097/00003446-200504000-00002. View

Korczak P, Kurtzberg D, Stapells D . Effects of sensorineural hearing loss and personal hearing AIDS on cortical event-related potential and behavioral measures of speech-sound processing. Ear Hear. 2005; 26(2):165-85. DOI: 10.1097/00003446-200504000-00005. View

Tremblay K, Billings C, Friesen L, Souza P . Neural representation of amplified speech sounds. Ear Hear. 2006; 27(2):93-103. DOI: 10.1097/01.aud.0000202288.21315.bd. View

Billings C, Tremblay K, Souza P, Binns M . Effects of hearing aid amplification and stimulus intensity on cortical auditory evoked potentials. Audiol Neurootol. 2007; 12(4):234-46. DOI: 10.1159/000101331. View

Golding M, Pearce W, Seymour J, Cooper A, Ching T, Dillon H . The relationship between obligatory cortical auditory evoked potentials (CAEPs) and functional measures in young infants. J Am Acad Audiol. 2007; 18(2):117-25. DOI: 10.3766/jaaa.18.2.4. View

Martin B, Tremblay K, Korczak P . Speech evoked potentials: from the laboratory to the clinic. Ear Hear. 2008; 29(3):285-313. DOI: 10.1097/AUD.0b013e3181662c0e. View

Billings C, Tremblay K, Stecker G, Tolin W . Human evoked cortical activity to signal-to-noise ratio and absolute signal level. Hear Res. 2009; 254(1-2):15-24. PMC: 2732364. DOI: 10.1016/j.heares.2009.04.002. View

Naylor G, Johannesson R . Long-term signal-to-noise ratio at the input and output of amplitude-compression systems. J Am Acad Audiol. 2009; 20(3):161-71. DOI: 10.3766/jaaa.20.3.2. View

Billings C, Tremblay K, Miller C . Aided cortical auditory evoked potentials in response to changes in hearing aid gain. Int J Audiol. 2011; 50(7):459-67. PMC: 3121886. DOI: 10.3109/14992027.2011.568011. View

10.

Easwar V, Glista D, Purcell D, Scollie S . Hearing aid processing changes tone burst onset: effect on cortical auditory evoked potentials in individuals with normal audiometric thresholds. Am J Audiol. 2012; 21(1):82-90. DOI: 10.1044/1059-0889(2012/11-0039). View

11.

Billings C, Papesh M, Penman T, Baltzell L, Gallun F . Clinical use of aided cortical auditory evoked potentials as a measure of physiological detection or physiological discrimination. Int J Otolaryngol. 2012; 2012:365752. PMC: 3472537. DOI: 10.1155/2012/365752. View

12.

Marynewich S, Jenstad L, Stapells D . Slow cortical potentials and amplification-part I: n1-p2 measures. Int J Otolaryngol. 2012; 2012:921513. PMC: 3483828. DOI: 10.1155/2012/921513. View

13.

Jenstad L, Marynewich S, Stapells D . Slow Cortical Potentials and Amplification-Part II: Acoustic Measures. Int J Otolaryngol. 2012; 2012:386542. PMC: 3502003. DOI: 10.1155/2012/386542. View

14.

Glista D, Easwar V, Purcell D, Scollie S . A Pilot Study on Cortical Auditory Evoked Potentials in Children: Aided CAEPs Reflect Improved High-Frequency Audibility with Frequency Compression Hearing Aid Technology. Int J Otolaryngol. 2012; 2012:982894. PMC: 3501956. DOI: 10.1155/2012/982894. View

15.

Billings C, McMillan G, Penman T, Gille S . Predicting perception in noise using cortical auditory evoked potentials. J Assoc Res Otolaryngol. 2013; 14(6):891-903. PMC: 3825022. DOI: 10.1007/s10162-013-0415-y. View

16.

Carter L, Dillon H, Seymour J, Seeto M, Van Dun B . Cortical auditory-evoked potentials (CAEPs) in adults in response to filtered speech stimuli. J Am Acad Audiol. 2013; 24(9):807-22. DOI: 10.3766/jaaa.24.9.5. View

17.

Sharma M, Purdy S, Munro K, Sawaya K, Peter V . Effects of broadband noise on cortical evoked auditory responses at different loudness levels in young adults. Neuroreport. 2013; 25(5):312-9. DOI: 10.1097/WNR.0000000000000089. View

18.

Miller S, Zhang Y . Neural coding of phonemic fricative contrast with and without hearing aid. Ear Hear. 2014; 35(4):e122-33. DOI: 10.1097/AUD.0000000000000025. View

19.

Tremblay K, Miller C . How neuroscience relates to hearing aid amplification. Int J Otolaryngol. 2014; 2014:641652. PMC: 4086374. DOI: 10.1155/2014/641652. View

20.

Zhang V, Ching T, Van Buynder P, Hou S, Flynn C, Burns L . Aided cortical response, speech intelligibility, consonant perception and functional performance of young children using conventional amplification or nonlinear frequency compression. Int J Pediatr Otorhinolaryngol. 2014; 78(10):1692-700. DOI: 10.1016/j.ijporl.2014.07.022. View