The image model method has been widely used to simulate room impulse
responses and the endeavor to adapt this method to different applications has
also piqued great interest over the last few decades. This paper attempts to
extend the image model method and develops an anchor-point-image-model (APIM)
approach as a solution for simulating impulse responses by including both the
source radiation and sensor directivity patterns. To determine the orientations
of all the virtual sources, anchor points are introduced to real sources, which
subsequently lead to the determination of the orientations of the virtual
sources. An algorithm is developed to generate room impulse responses with APIM
by taking into account the directional pattern functions, factional time
delays, as well as the computational complexity. The developed model and
algorithms can be used in various acoustic problems to simulate room acoustics
and improve and evaluate processing algorithms.Comment: 19 pages, 8 figure