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Updated: Aug 27, 2025

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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A basic protocol for the acoustic characterization of small and medium-sized classrooms.

Arianna Astolfi1, Greta Minelli1, Giuseppina Emma Puglisi1

  • 1Politecnico di Torino, Department of Energy, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.

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Summary

A simplified classroom acoustics protocol uses fewer measurements to assess sound environments. Speech clarity in the center can effectively replace reverberation time for classifying acoustic quality.

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Area of Science:

  • Acoustics
  • Environmental Science
  • Education

Background:

  • Classroom acoustics significantly impact learning environments.
  • Effective characterization of sound environments is crucial for optimizing educational spaces.
  • Existing protocols can be complex and time-consuming.

Purpose of the Study:

  • To develop a simplified measurement protocol for characterizing classroom acoustics.
  • To identify a minimum set of parameters and positions for effective assessment.
  • To evaluate the accuracy and precision of simplified acoustic metrics.

Main Methods:

  • A basic measurement protocol was applied in 29 primary school classrooms.
  • Background noise, reverberation time, speech clarity, and speech levels were measured.
  • Data were analyzed to identify correlations and establish thresholds for acoustic classification.

Main Results:

  • A strong correlation was found among various acoustic parameters.
  • Speech clarity in the central classroom position emerged as a reliable indicator.
  • Simplified parameters demonstrated accuracy in classifying acoustic quality.

Conclusions:

  • A simplified protocol can effectively characterize classroom acoustics.
  • Speech clarity offers a convenient alternative to reverberation time for acoustic assessment.
  • This approach facilitates faster and more efficient evaluation of educational sound environments.