I want to simulate a sound source in one room and a microphone in a second, adjacent room. I am familiar with the image method and Habet's very efficient implementation for room impulse response (RIR). This implementation will be problematic when the source is in another, second room. However, the limitations of the image method for rectangular rooms and frequency constant reflection coefficients are good enough for me as it is a simulation.
AS I wish to simulate a large number of examples (~1000) so measuring an RIR is not an option and an inaccurate, fast simulation method is good enough.
I also found this paper but I could find no implementation available. This implies that it is possible to simulate though I am not sure.
I am looking for an implementation of an RIR generator for coupled rooms or another quick solution. I wish to spend as little time as possible on learning the inside of the generation method, as it is not my goal, so another tool\method with a good tutorial and fast ramp-up will be also very helpful.
Can anyone recommend the shortest way to achieve this?