Investigations into vocal doses and parameters pertaining to primary school teachers in classrooms

Pasquale Bottalico, Arianna Astolfi

Research output: Contribution to journalArticlepeer-review


Investigations 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 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, L A90, was found during traditional lessons, as well as an increase in the mean value of the fundamental frequency with an increase in L A90, at a rate of 1.0 Hz/dB.

Original languageEnglish (US)
Pages (from-to)2817-2827
Number of pages11
JournalJournal of the Acoustical Society of America
Issue number4
StatePublished - Apr 2012
Externally publishedYes

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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