1,721,034 research outputs found
Objective and subjective speech intelligibility assessments in primary school classrooms
No full textComparison between intelligibility scores before and after an acoustical treatment in primary school classrooms
No full textIndagini oggettive e soggettive sull'influenza del rumore e della riverberazione sullo sforzo vocale di insegnanti di scuola primaria
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Intelligibilità del parlato per bambini di scuola elementare in diverse condizioni acustiche
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Investigations into vocal doses and parameters pertaining to primary school teachers in classrooms
Full text linkInvestigations into vocal doses and parameters were carried out on 40 primary school teachers (36 females and 4 males) in six schools in Italy, divided into two groups of three, A and B, on the basis of the type of building and the mid-frequency reverberation time in the classrooms, which was 1.13 s and 0.79 s, respectively. A total of 73 working-day samples were collected (66 for females and 7 for males), from which 54 traditional lessons were analyzed separately. The average value over the working days of the mean sound pressure level of the voiced speech at 1 m from the teacher's mouth was 62.1 dB for the females and 57.7 dB for the males, while the voicing time percentage was 25.9% and 25.1%, respectively. Even though the vocal doses and parameters did not differ for the two school groups, the differences in the subjective scores were significant, with enhanced scores in group B. A 0.72 dB increase in speech level per 1 dB increase in background noise level, LA90, was found during traditional lessons, as well as an increase in the mean value of the fundamental frequency with an increase in LA90, at a rate of 1.0 Hz/dB
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