What is reverberation?
A reverberation is the overall effect of reflected sound and the time required for reflected sound to become inaudible. Short reverberation times are good for speech intelligibility; especially in learning spaces.
Why is it important?
Each day thousands of students are unable to understand one out of every four spoken words in classrooms due to inadequate ceiling acoustics. With Total Acoustics ceiling systems you’ll meet or exceed ANSI standards, earn LEED points and create a better place for teachers to teach, and students to learn.
In 5 steps you can calculate the reverberation time in your space and hear the difference acoustical treatments can make. Try our online tool for a quick calculation.
Custom Reverberation Report
Armstrong can provide you with reverberation (RT) and speech privacy (PI) calculations through our Customer Focus Center, Technical Consultants in TechLine.
The LEEDv4 acoustical requirements for reverberation now apply to all types of building types and spaces. The reverberation time calculation results summary has been verified by USGBC as appropriate documentation for LEEDv4 EQc9, Acoustic Performance. Follow the five simple steps and attach the results to your LEEDv4 submittal documentation.
ANSI Standard S12.60 for Classroom Acoustics addresses the issues of both reverberation time and background noise and their effect on speech intelligibility by placing maximum permissible levels on each.
Under the new standard, the maximum reverberation time in an unoccupied, furnished classroom with a volume under 10,000 cubic feet is 0.6 seconds, and 0.7 seconds for a classroom between 10,000 and 20,000 cubic feet. The maximum level of background noise allowed in the same classroom is 35 decibels (dBA).