Banca de QUALIFICAÇÃO: LUCIANA DA ROCHA ALVES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LUCIANA DA ROCHA ALVES
DATE: 19/04/2023
TIME: 09:00
LOCAL: remoto
TITLE:

CLASSROOM ACOUSTICS: EVALUATION OF BACKGROUND NOISE INTERFERENCE ON USER COGNITIVE PERFORMANCE USING VIRTUAL REALITY

KEY WORDS:

virtual reality, serial recall test, subjective acoustic, user sound perception, classroom in Brazil

PAGES: 108
BIG AREA: Ciências Sociais Aplicadas
AREA: Arquitetura e Urbanismo
SUMMARY:

The classroom is an ambient that, among other characteristics, must have adequate acoustics to provide students with a satisfactory environment for the functions related to teaching-learning process. Several studies point out that the teaching-learning process can be impaired by unsatisfactory classroom acoustics, which deteriorates the understanding of the teacher's speech by the student, besides causing physiological effects, such as stress and fatigue. In Brazil, attention to acoustical treatment of classrooms may be considered recent and still not very extensive, and its importance may be unnoticed even by students who have never studied in a classroom with proper acoustics. The main objective of this dissertation is to evaluate the perception of users in classrooms with different acoustic quality conditions due to the interference of external noises. The specific objectives can be listed as: 1 - Identify standards of classrooms in Brazil as to dimensions and covering materials from studies conducted with emphasis on acoustics; 2 - Analyze the room acoustics of a real classroom through measurements and simulations to base auralizations in different sound conditions; 3 - To evaluate the influence of different levels of acoustic insulation and conditioning, through auralizations, on student attention in a virtual reality environment; 4 - To evaluate the interference of different types of common noises in educational environments on the level of attention of students in the virtual environment with the best sound condition; and 5 - To compare the results obtained through cognitive tests with the subjective perception of the participants. The current dissertation, under development, had a study conducted in a virtual reality environment with five different acoustic conditions to evaluate the users' perception of these conditions through a cognitive performance test. The acoustic conditions were a combination of an acoustic insulation condition and a room acoustic condition, in addition to the " silent" condition. Two acoustic insulation and room acoustic conditions were auralized, with one being satisfactory and one being unsatisfactory for each parameter. The same test was repeated with another group of participants. The results of this study indicate that there was a high variability in the correct response rate between participants in all conditions, and the condition with good acoustic insulation and conditioning had the most variability. All conditions had a similar average of correct responses rate between them. Fatigue and response time factors were evaluated in the experiment, which did not show a trend of behavior according to the order in which the test was performed. One factor observed in this study was the importance of varying the audio recording so that cyclic repetition does not condition the participant to predict sound events, a condition that would not happen in a real situation. A further test using recording of conversations as residual noise is planned to assess whether changing the sound source produces distinct effects.

COMMITTEE MEMBERS:
Presidente - 3549781 - BIANCA CARLA DANTAS DE ARAUJO
Interna - 347627 - VIRGINIA MARIA DANTAS DE ARAUJO
Externo ao Programa - 3087032 - ALEXANDRE VIRGINELLI MAIORINO - UFRNExterna à Instituição - VIVIANE SUZEY GOMES DE MELO - UFSM