There is no substitute for an Acoustical Consultant, this calculator is a elementary tool to help determine your basic needs. Please contact us for help in finding your local Acoustical Consultant.
The maximum reverberation time for clear speech is about 2 seconds. When reverberation time exceeds 2 seconds, speech becomes increasingly more difficult to understand and finally becomes unintelligible at reverberation times of 4 to 10 seconds. Speech intelligibility improves as reverberation time decreases below 2 seconds.The ideal for classrooms or lecture spaces is actually lower than 1 second.