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https://codas.org.br/article/doi/10.1590/2317-1782/e20250206en
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Case Report

Post-masking in cortical auditory evoked potentials following acoustically controlled auditory training: a case report

Matheus Costa Gonçalves; Pedro de Lemos Menezes; Carlos Henrique Alves Batista; Danielle Cavalcante Ferreira; Kelly Cristina Lira de Andrade

http://dx.doi.org/10.1590/2317-1782/e20250206en CoDAS, vol.38, n3, e20250206, 2026
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Abstract

ABSTRACT: Central auditory processing refers to the individual's ability to process auditory information within the central auditory nervous system and involves a set of auditory skills. Deficits in one or more of these skills characterize central auditory processing disorder. Given the presence of this disorder, auditory training is indicated as a set of strategies designed to activate the auditory system and improve the processing of acoustic signals. Electrophysiological measures such as cortical auditory evoked potential may serve as a valuable supplement to the behavioral assessment of auditory processing. When associated with noise, temporal masking is assessed. It is characterized as an alteration in the perception of a sound in the presence of another auditory stimulus. Individuals with this disorder are more susceptible to post-masking effects due to difficulties in understanding speech in noisy environments. This study reports the case of a 25-year-old adult diagnosed with central auditory processing disorder who underwent cortical auditory evoked potentials using speech stimulus preceded by noise. The acoustically controlled auditory training was conducted over 10 sessions, using the “Afinando o Cérebro” platform. Following intervention, improvements were observed in the participant's auditory skills, along with reductions in the latencies of the P1, N1 and P2 waves and in the N1-P1 and N1-P2 peak-to-peak amplitudes. These findings highlight the effects of acoustically controlled auditory training and contribute to a better understanding of the neurophysiological mechanisms involved in speech perception in noise among individuals with central auditory processing disorder.

Keywords

Auditory Perception, Auditory Perceptual Disorders, Auditory Evoked Potential, Noise, Speech

Referencias

1 ASHA: American Speech and Hearing Association. (Central) auditory processing disorders-the role of the audiologist [Internet]. Rockville: American Speech-Language-Hearing Association; 2005 [cited 2025 Jun 4]. Available from: https://www.asha.org/policy/ps2005-00114/.

2 Dias KZ, Gil D. Treinamento auditivo acusticamente controlado nos distúrbios de processamento auditivo. In: Boéchat ED, Menezes PL, Couto CM, Frizzo ACF, Scharlach RC, Anastasio ART. Tratado de Audiologia. 2. ed. Rio de Janeiro: Guanabara Koogan; 2015. p. 787-96.

3 Musiek FE, Chermak GD, Weihing J. Auditory Training. In: Chermak GD, Musiek FE. Handbook of central auditory processing disorder: comprehensive intervention. 2. ed. San Diego: Plural Publishing; 2013. p. 157-200.

4 Frizzo ACF. Potencial evocado auditivo cortical. In: Menezes PL, Andrade KCL, Frizzo ACF, Carnaúba ATL, Lins OG. Tratado de Audiologia. 1. ed. Ribeirão Preto: Book Toy; 2022. p. 235-50.

5 Shinn JB. Temporal processing: the basics. Hear J. 2003;56(7):52. http://doi.org/10.1097/01.HJ.0000292557.52409.67.

6 Advíncula KP, Menezes DC, Pacífico FA, Costa MLG, Gris SMS. Age effects in temporal auditory processing: modulation masking release and forward masking effect. Audiol Commun Res. 2018;23:1-6.

7 Grose JH, Menezes DC, Porter HL, Griz S. Masking period patterns and forward masking for speech-shaped noise: age-related effects. Ear Hear. 2016;37(1):48-54. http://doi.org/10.1097/AUD.0000000000000200. PMid:26230495.

8 Stephens JDW, Holt LL. A standard set of American-English voiced stop-consonant stimuli from morphed natural speech. Speech Commun. 2011;53(6):877-88. http://doi.org/10.1016/j.specom.2011.02.007. PMid:21666844.

9 Cruz ACA, Andrade AN, Gil D. Effectiveness of formal auditory training in adults with auditory processing disorder. Rev CEFAC. 2013;15(6):1427-34. http://doi.org/10.1590/S1516-18462013000600004.

10 Zalcman TE, Schochat E. Formal auditory training efficacy in individuals with auditory processing disorder. Rev Soc Bras Fonoaudiol. 2007;12(4):310-4. http://doi.org/10.1590/S1516-80342007000400010.

11 Madruga-Rimoli CC. Crianças com dificuldades de leitura e escrita: avaliação comportamental e eletrofisiológica do processamento auditivo central pré e pós treinamento auditivo [thesis]. Campinas: Faculdade de Ciências Médica, Universidade Estadual de Campinas; 2020.

12 Mehraei G, Gallardo AP, Shinn-Cunningham BG, Dau T. Auditory brainstem response latency in forward masking, a marker of sensory deficits in listeners with normal hearing thresholds. Hear Res. 2017;346:34-44. http://doi.org/10.1016/j.heares.2017.01.016. PMid:28159652.

13 Eggermont JJ. Correlated neural activity as the driving force for functional changes in auditory cortex. Hear Res. 2007;229(1-2):69-80. http://doi.org/10.1016/j.heares.2007.01.008. PMid:17296278.

14 Tremblay K, Kraus N, McGee T, Ponton C, Otis B. Central auditory plasticity: changes in the N1-P2 complex after speech-sound training. Ear Hear. 2001;22(2):79-90. http://doi.org/10.1097/00003446-200104000-00001. PMid:11324846.

15 Schvartz-Leyzac KC, Pfingst BE. Across-site patterns of electrically evoked compound action potential amplitude-growth functions in multichannel cochlear implant recipients and the effects of the interphase gap. Hear Res. 2016;341:50-65. http://doi.org/10.1016/j.heares.2016.08.002. PMid:27521841.
 

Submitted date:
04/06/2025

Accepted date:
10/08/2025

69e6b8eca9539521a62bc2e8 codas Articles
2317-1782 (Electrónico)
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