Energy Time Curves showing reverberation times. (click on images for large reproductions)
Energy – Time plots showing slow decay of sound pressure. On the left, conversation in this room is difficult at distances greater than 6 metres. Listening conditions in this room were made worse by poor PA system layout and performance.
Listen to Track 10 in the audio file library to hear the effect of long reverberation time. (Audio Library)
The plots show severe flutter echoes in two different rooms. For the left hand graph, which is a studio,Track 4,5 & 6 in the Audio Library replicate sound outside the room, inside the room as is, and inside the room after treatment is applied respectively. (Audio Library) The right hand graph was obtained using EASERA and shows markers which measure the main regular interval at around 110ms. The room was about 30m wide .. or … 110 ms flight time from one side to the other.