An Anchor-Point Based Image-Model for Room Impulse Response Simulation with Directional Source Radiation and Sensor Directivity Patterns

TL;DR

This paper extends the image model method for room impulse response simulation by incorporating source and sensor directivity patterns through an anchor-point approach, enabling more accurate acoustic modeling.

Contribution

It introduces an anchor-point-image-model (APIM) that accounts for directional source radiation and sensor directivity, enhancing room impulse response simulations.

Findings

Developed an algorithm for APIM-based impulse response generation.

Incorporated directional patterns and fractional time delays.

Applicable to various acoustic simulation and processing tasks.

Abstract

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.