What is it about?
From data logged over 6 full school days in each of 220 occupied K-12 classrooms, we have extracted what the typical speech and non-speech levels were, as well as the signal-to-noise ratios that students experienced in their classrooms. We also have identified how often speech occurred in those classrooms, differences across grades, and how often speech and non-speech levels exceeded certain values.
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Why is it important?
ANSI S12.60 "Acoustical Performance Criteria, Design Requirements, And Guidelines For Schools, Part 1: Permanent Schools" recommends that signal-to-noise ratios in classrooms be at least 15 dB; that is, the desired signal (speech) should be at least 15 dB higher in level than the ambient noise in the occupied room (non-speech). This paper presents measured data taken during multiple occupied school days from each of 220 K-12 classrooms, and reports that 27% of the classrooms in the sample did not meet that requirement.
Read the Original
This page is a summary of: Speech and noise levels measured in occupied K–12 classrooms, The Journal of the Acoustical Society of America, August 2021, Acoustical Society of America (ASA), DOI: 10.1121/10.0005815.
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