Measuring noise in classrooms: a systematic review

Fidêncio, Vanessa Luisa Destro; Moret, Adriane Lima Mortari; Jacob, Regina Tangerino de Souza

doi:10.1590/2317-1782/2014029in

Cited by 13 publications

(9 citation statements)

References 10 publications

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“…The noise level used in the present study was within a suitable range that can be used during an extended period of learning. In a systematic review study [48], it has been suggested that the optimal noise level for a classroom ranges from 40 to 65 dB. Our behavioral results in Table 1 indicated that behavioral performance improved gradually from 15 to 5-dB SNR and later decreased at 0-dB SNR, as compared to the quiet (baseline) condition.…”

Section: Discussionmentioning

confidence: 57%

Low intensity white noise improves performance in auditory working memory task: An fMRI study

Othman

Yusoff

Mohamad

et al. 2019

Heliyon

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A B S T R A C TResearch suggests that white noise may facilitate auditory working memory performance via stochastic resonance. Stochastic resonance is quantified by plotting cognitive performance as a function of noise intensity. The plot would appear as an inverted U-curve, that is, a moderate noise is beneficial for performance whereas too low and too much noise attenuates performance. However, knowledge about the optimal signal-to-noise ratio (SNR) needed for stochastic resonance to occur in the brain, particularly in the neural network of auditory working memory, is limited and demand further investigation. In the present study, we extended previous works on the impact of white noise on auditory working memory performance by including multiple background noise levels to map out the inverted U-curve for the stochastic resonance. Using functional magnetic resonance imaging (fMRI), twenty healthy young adults performed a word-based backward recall span task under four signal-to-noise ratio conditions: 15, 10, 5, and 0-dB SNR. Group results show significant behavioral improvement and increased activation in frontal cortices, primary auditory cortices, and anterior cingulate cortex in all noise conditions, except at 0-dB SNR, which decreases activation and performance. When plotted as a function of signal-to-noise ratio, behavioral and fMRI data exhibited a noise-benefit inverted U-shaped curve. Additionally, a significant positive correlation was found between the activity of the right superior frontal gyrus (SFG) and performance in 5-dB SNR. The predicted phenomenon of SR on auditory working memory performance is confirmed. Findings from this study suggest that the optimal signal-to-noise ratio to enhance auditory working memory performance is within 10 to 5-dB SNR and that the right SFG may be a strategic structure involved in enhancement of auditory working memory performance.

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Section: Discussionmentioning

confidence: 57%

Low intensity white noise improves performance in auditory working memory task: An fMRI study

Othman

Yusoff

Mohamad

et al. 2019

Heliyon

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“…These data corroborate the findings reported in previous studies, which have stated that the noise levels exceed those recommended by standards. [ 5 7 8 34 ]…”

Section: Discussionmentioning

confidence: 99%

Evaluating effectiveness of dynamic soundfield system in the classroom

et al. 2016

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Research has reported on the use of soundfield amplification devices in the classroom. However, no study has used standardized tests to determine the potential advantages of the dynamic soundfield system for normally hearing students and for the teacher's voice. Our aim was to evaluate the impact of using dynamic soundfield system on the noise of the classroom, teacher's voice and students’ academic performance. This was a prospective cohort study in which 20 student participants enrolled in the third year of basic education were divided into two groups (i.e., control and experimental); their teacher participated. The experimental group was exposed to the dynamic soundfield system for 3 consecutive months. The groups were assessed using standardized tests to evaluate their academic performance. Further, questionnaires and statements were collected on the participants’ experience of using the soundfield system. We statistically analyzed the results to compare the academic performance of the control group with that of the experimental group. In all cases, a significance level of P < .05 was adopted. Use of the dynamic soundfield system was effective for improving the students’ academic performance on standardized tests for reading, improving the teacher's speech intelligibility, and reducing the teacher's vocal strain. The dynamic soundfield system minimizes the impact of noise in the classroom as demonstrated by the mensuration of the signal-to-noise ratio (SNR) and pupil performance on standardized tests for reading and student and teacher ratings of amplification system effectiveness.

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“…By this, noise pollution spreads far and wide and it becomes difficult to find a quiet place [2]. In serene environments, noise is not only a nuisance, but also interferes with the performance of the activities of the area, for example, in education [3,4] and school settings, students; and teachers feel uncomfortable. While in noisy hospital, patients will be adversely affected.…”

Section: Introductionmentioning

confidence: 99%

Assessments of Noise Levels From Noise Sources in Akure, Nigeria: A Preliminary Study

Abulude

Fagbayide

Akinnusotu³

2018

ijs

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Background: Noise injury and hearing loss are significant problems in Nigerian community. The hearing loss sustained from noise injury can have disabled personnel and social consequences for the affected persons and their families. This study was carried out to quantify the noise level of over eighty (80) different sources using the sound level meter (GB: 2266204) at different locations in Akure, capital of Ondo State, Nigeria. Standard procedure specified by the manufacturer was strictly followed and the results were statistically analyzed. The range of results obtained were: household products (48.5±0.

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Measuring noise in classrooms: a systematic review

Abstract: Classrooms are noisy environment and there is no standardization regarding the methodology that should be used to measure the noise in these places. Therefore, schools need to be guided constantly about the importance of acoustic adaptation in the classroom.

Cited by 13 publications

References 10 publications

Low intensity white noise improves performance in auditory working memory task: An fMRI study

Low intensity white noise improves performance in auditory working memory task: An fMRI study

Evaluating effectiveness of dynamic soundfield system in the classroom

Assessments of Noise Levels From Noise Sources in Akure, Nigeria: A Preliminary Study

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