Article
Differentiable Acoustic Path Tracing: Full Spectral Rendering (en)
* Presenting author
Abstract:
This work introduces an extension to Mitsuba3, a physically based differentiable rendering framework optimized for efficient GPU computation, enhancing its capabilities for full spectral acoustic path tracing. The framework allows for the representation of emission, receiver sensitivity, absorption, and scattering spectra at user-defined frequency nodes. Spectral data is automatically interpolated to any frequency within the specified frequency range. This approach simplifies the process for users, making full spectral rendering accessible without requiring in-depth knowledge of the underlying path tracing algorithms.An important feature is the implementation of Importance Sampling in logarithmic frequency space, ensuring an even distribution of rays across frequency bands.The framework also supports outputs in channels with arbitrary frequency responses, such as (third-) octave bands, improving simulation fidelity.Through our work, we aim to provide researchers and practitioners with a valuable tool for differentiable acoustics simulations. We discuss the practical results and applications of this framework.