"Sound renderers" do exist, and some are very good: have a look at the research of Nikunj Raghuvanshi. For an introduction to their rendering method:
Nikunj Raghuvanshi, Rahul Narain and Ming C. Lin, Efficient and Accurate Sound Propagation Using Adaptive Rectangular Decomposition, IEEE Transactions on Visualization and Computer Graphics(TVCG), 15(5), 2009.
Accurate sound rendering can add significant realism to complement
visual display in interactive applications, as well as facilitate
acoustic predictions for many engineering applications, like accurate
acoustic analysis for architectural design. Numerical simulation
can provide this realism most naturally by modeling the underlying
physics of wave propagation. However, wave simulation has
traditionally posed a tough computational challenge. In this paper, we
present a technique which relies on an adaptive rectangular
decomposition of 3D scenes to enable efficient and accurate simulation
of sound propagation in complex virtual environments. It exploits the
known analytical solution of the Wave Equation in rectangular domains,
and utilizes efficient implementation of Discrete Cosine Transform on
the GPU to achieve at least a hundred-fold performance gain compared
to a standard Finite Difference Time Domain (FDTD) implementation with
comparable accuracy, while also being an order of magnitude more
memory-efficient. Consequently, we are able to perform accurate
numerical acoustic simulation on large, complex scenes in the
kilohertz range. To the best of our knowledge, it was not previously
possible to perform such simulations on a desktop computer. Our work
thus enables acoustic analysis on large scenes and auditory display
for complex virtual environments on commodity hardware.
The paper has its own website. The manuscript version of the paper there is missing some prose, so preferably get the paper from the first link.
Siemens, for example, advertises acoustics simulation as part of their computer aided engineering solutions.