Room acoustics measurements using MLSSA
Douglas D. Rife · The Journal of the Acoustical Society of America · 1991
The time-bandwidth product of a linear system is defined as the product of its bandwidth and its impulse-response duration. Due to its reverberation, the time-bandwidth product of a typical room is much larger than that of other common linear systems (e.g., acoustic transducers or electronic filters), thus posing special problems to the measurement system. It is shown that maximum length sequence (MLS) based measurements are inherently well suited to large time-bandwidth product systems, including auditoria. The MLSSA measurement system represents the first commercial implementation of MLS measurement methods and provides a variety of post-measurement processing functions for room acoustics applications.