An Acoustic Paintbrush Method for Simulated Spatial Room Impulse Responses
Virtual reality applications require all kinds of methods to create
plausible virtual acoustics environments to enhance the user experience. Here, we present an acoustic paintbrush method that modifies
the timbre of a simple room acoustics simulation with the timbre
of a measured room response while aiming to preserve the spatial
aspects of the simulated room. In other words, the method only
applies the measured spectral coloration and alters the simulated
and temporal distribution of early reflections as little as possible.
Three variations of the acoustic paintbrush method are validated
with a listening test. The results indicate that the method works
reasonably well. The paintbrushed room acoustic simulations were
perceived to become closer to the measured room acoustics than
the source simulation. However, the limits of the perceived effect
varied depending on the input signal and the simulated and recorded
responses. This warrants for further perceptual testing.