Comparison between intelligibility scores before and after an acoustical treatment in primary school classrooms

Arianna Astolfi, Pasquale Bottalico

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work describes the results of speech intelligibility tests and measurements performed in one primary school laboratory-classroom before and after a sound adsorption acoustical treatment. It consisted of placing an acoustically absorbent suspended ceiling with the central part reflective, covering the upper part of lateral and back walls with mineral wool panels, covering the lower part of the walls and the back corner with plasterboard panels. The occupied mid-frequency reverberation time (RT) decreased from 1.6 s to 0.4 s. The different classes, of grades 2, 3, 4, and 5 students, turned in the lab-room to carry out the tests in presence of different types of noise. Speech bubble and fan-coil noises were emitted into the room, traffic noise came from an external source and impact noise was generated on the floor upstairs the classroom. A sample of 210 students aged 7 to 11 years were tested before and after the treatment. A total of 3360 tests were administered to the children. The correlations between speech intelligibility and objective parameters are obtained for children of different age. The availability of data referred to two different conditions, with high and low RT respectively, allows to determine intelligibility decrease due to reverberation. Results from a similar school survey were also compared.

Original languageEnglish (US)
Title of host publication8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
EditionPART 3
StatePublished - Dec 1 2009
Externally publishedYes
Event8th European Conference on Noise Control 2009, EURONOISE 2009 - Edinburgh, United Kingdom
Duration: Oct 26 2009Oct 28 2009

Publication series

Name8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
NumberPART 3
Volume31

Other

Other8th European Conference on Noise Control 2009, EURONOISE 2009
Country/TerritoryUnited Kingdom
CityEdinburgh
Period10/26/0910/28/09

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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