Abstract
In the early days of digital electronics, MLS (maximum-length sequence) with a very long period has been used primarily as a substitution for the conventional white noise generators employing gas discharge tubes or temperature-limited diodes. Hence, it is also called pseudorandom sequence. But MLS is in fact periodic and deterministic. When exactly one period of data is used, no ensemble averaging is required. It seems that such an application has been overlooked in the field of architectural acoustics until Schroeder published his works in the late 1970s. This potentially very useful technique was immediately recognized at IRC/NRC and a program was set up to develop the technique with special emphasis on applications to the various architectural acoustics measurements. This talk will trace our development work and present results obtained from the various applications of the technique.
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