Room Impulse Response Estimation Using Signed Distance Functions
There are several algorithms and approaches to Room
Impulse Response (RIR) estimation. To the best of the author’s
knowledge, there is no documentation of accuracy, speed, or
even the feasibility of using signed distance functions (SDFs) in
combination with sphere tracing for this task. A proof of concept
with a focus on real-time performance is presented here, which
still lacks many features such as frequency-dependent absorption
and scattering coefficients, arbitrary source and receiver directives
etc. The results are then compared to real room impulse responses
and to a different simulation algorithm. Also, the rather special
merits of such an approach, such as 4D reverberation and simple
rounding of geometry, are briefly discussed and presented.