Surround Sound Acoustic Measurement
Room Impulse Response, Reverberation Measurement & Convolution Reverb
Project Team (Faculty of Engineering Students, University of Victoria):
Madeline Carson Hudson Giesbrecht Tim Perry Dr. Peter Driessen (Supervisor)
|DETAILED REPORT||RESEARCH POSTER||AUDIO DEMO|
We used state of the art acoustic measurements to capture the sonic fingerprint of the Phillip T. Young Recital Hall from many different perspectives. We then created a convolution reverb to "reproduce" the recital hall acoustics over a surround sound playback system.
Method: We used a 5-channel circular microphone array to measure a matrix of 70 surround sound room impulse responses: At each of 7 listener locations, the response was captured for 10 sound source positions. This source-listener matrix can be used to simulate the acoustic space from multiple perspectives.
The impulse responses have exceptional signal to noise ratios thanks to the exponential sine sweep measurement technique.
To test the results on listeners, we created a surround sound convolution reverb. By performing multi-sound-source convolutions, dry-recorded signals can be virtually placed into the measured acoustic space. An ensemble with up to 10 performers can be simulated with natural sounding acoustics.