Image Method for Efficiently Simulating Small-room Acoustics

Image methods are commonly used for the analysis of the acoustic properties of enclosures. In this paper we discuss the theoretical and practical use of image techniques for simulating. on a digital computer, the impulse response between two points in a small rectangular room. The resulting impulse response, when convolved with any desired input signal, such as speech, simulates room reverberation of the input signal. This !echnique isuseful in signal processing or psychoacoustic studies. The entire process i carried out on a digital computer so that a wide range of room parameters can be studied with accurate control over the experimental conditions. A FORmS• implementation of this model has been included.