| Accurate room acoustic simulation techniques have been developed and used for some time in a laboratory setting. Hardware implementations, however, have been limited in performance by the necessity for real time operation within a reasonable cost constraint. The work described here consists of four main parts: (1)algorithms: experimentation with software simulation techniques. (2)architecture: design, construction, and testing of hardware structures to approximate the above simulation. (3)analysis: consideration of appropriate error measures for simulation performance, use of these on hardware and software results. (4)conclusions: decisions for preferred approaches in future work, along with preliminary simulations of related ideas.;Finally, experience with the two hardware designs suggests preferred approaches for future devices; in particular, a general purpose digital audio signal processor. This system would be capable of other environmental simulation features than those implemented in the current work; for example, noise removal. A new technique for performing such a function, as well as a novel architectural approach, are outlined.;An overall consideration in this work is the choice of analog or digital discrete time hardware. The primary design uses an analog signal path with digital control. A further project implements the same algorithms with a digital signal path. Comparisons between the two are made here. |
