Classroom Acoustics (Practice Portal)

Summary

Professional guidance on assessing distance, noise and reverberation and improving educational listening environments.

Key findings

• Defines critical distance as where direct and reflected sound have equal strength. Beyond it, reflections dominate as direct sound weakens.
• Defines RT60 as the time for sound to decay by 60 dB and SNR as the signal level relative to background noise. Recommends assessing both room acoustics and listener performance.
• Recommends addressing background noise, then appropriate room modifications, and repeating measurements after changes. It distinguishes helpful early reflections from later reflections that blur speech.
• Its standards list names the 2010 Part 1 edition of S12.60, reaffirmed in 2020.

Limits

Educational guidance used here for the shared acoustic path, not as evidence for installing personal microphones or classroom audio distribution. No publication or update date was found in the readable article. Numeric school criteria cannot automatically be applied to other venues.

Read the original

www.asha.org/practice-portal/professional-issues/Classroom-Acoustics

Link checked 13 October 2026. We link to the original and do not host copies.

Cited in

• How much do room acoustics and distance limit listening without a system, and what follows for choosing one?Partly answered

Cite this source

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