Banca de QUALIFICAÇÃO: MÔNYKA ROCHA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : MÔNYKA ROCHA
DATE: 15/01/2024
TIME: 09:00
LOCAL: Videoconferência (Online)
TITLE:

Effect of modulated masking on the assessment of cortical auditory evoked potentials and
behavioral auditory thresholds.

KEY WORDS:

Electrophysiology; Auditory evoked potentials; Speech perception; Perceptual
masking.

PAGES: 120
BIG AREA: Multidisciplinar
AREA: Biotecnologia
SUBÁREA: Biotecnologia em Saúde
SUMMARY:

Introduction: The study of the Masking Release phenomenon or Benefit of Modulated
Masking in the electrophysiological and behavioral domains has enabled the improvement of
research regarding temporal auditory processing abilities and the establishment of parameters
for analyzing speech recognition in noise situations. The use of electrophysiological
measurements with Cortical Auditory Evoked Potentials makes it possible to objectively
evaluate the temporal processing of hearing in the face of the phenomenon of noise modulation.
Considering the lack of normal parameters for evaluating this benefit in some age groups and
the importance of the relationship between behavioral and electrophysiological domains in
auditory assessment, it is necessary to investigate aspects of temporal auditory processing given
this benefit, with associated electrophysiological measures to behavioral assessment measures.
In view of this, this study aims to analyze whether modulated noise evokes better responses in
cortical auditory evoked potentials and improves behavioral thresholds when compared to
steady noise. Methodology: This is an analytical, cross-sectional and observational study,
carried out in the Audiology laboratory of the Speech Therapy Department of the Federal
University of Pernambuco. The population will consist of a total of 60 individuals, young,
adults and elderly, between 18 and 75 years of age, of both sexes and with normal hearing.
Individuals with hearing loss of any type or degree, history of neurological and/or psychiatric
diseases, individuals with ear pinna and external auditory canal malformations will be excluded
from the research. Individuals will undergo the Modulated Masking Benefit assessment
protocol through electrophysiological and behavioral measures. This electrophysiological
protocol will rely on the use of the Cortical Auditory Evoked Potential test with speech stimulus
/ba/ presented simultaneously with speech noise (Speech Shaped Noise) in three conditions: a)
stimulus and weak steady noise; b) stimulus and strong steady noise; c) stimulus and modulated
noise. Latency and amplitude of cortical components P1, N1 and P2 will be analyzed, as well
as the electrophysiological threshold in stable noise and modulated noise conditions. In the
behavioral assessment, a sentence recognition test will be used in the presence of steady and
modulated noise, using the 12 lists (with 20 sentences each) of the HINT-Brazil test, in order
to compare the effect of noise modulation in both domains. Partial results: Partial results from
40 individuals between 18 and 50 years of age, of both sexes and normal hearing, showed less
interference from modulated noise in latency and amplitude measurements of cortical
components, generating a significant reduction in P1 latency and increased P2 amplitude in
both groups of participants. Steady noise generated higher electrophysiological and behavioral
thresholds compared to modulated noise. A greater magnitude of the BMM was observed in the
young-adult group, indicating a greater temporal resolution ability in younger individuals.
These findings were submitted in an article. A systematic review with meta-analysis on the
effect of modulated masking on cortical auditory potential was also developed as a product of
this thesis.

COMMITTEE MEMBERS:
Presidente - ***.848.674-** - PEDRO DE LEMOS MENEZES - UNCISAL
Interno(a) - 2120103 - MARILIA OLIVEIRA FONSECA GOULART
Externo(a) à Instituição - DENISE COSTA MENEZES
Externo(a) à Instituição - ANA CLAUDIA FIGUEIREDO FRIZZO - UNESP
Externo(a) à Instituição - KARINA PAES ADVÍNCULA - UFPE