Fast synthesis of perceptually adequate room impulse responses from ultrasonic measurements
Metadata only
Date
2020-09Type
- Conference Paper
Abstract
Audio augmented reality (AAR) applications need to render virtual sounds with acoustic effects that match the real environment of the user to create an experience with strong sense of presence. This audio rendering process can be formulated as the convolution between the dry sound signal and the room impulse response (IR) that covers the audible frequency spectrum (20Hz - 20kHz). While the IR can be pre-calculated in virtual reality (VR) scenes, AR applications need to continuously estimate it. We propose a method to synthesize room IRs based on the corresponding IR in the ultrasound frequency band (20kHz - 22kHz) and two parameters we propose in this paper: slope factor and RT60 ratio. We assess the synthesized IRs using common acoustic metrics and we conducted a user study to evaluate participants' perceptual similarity between the sounds rendered with the synthesized IR and with the recorded IR in different rooms. The method requires only a small number of pre-measurements in the environment to determine the synthesis parameters and it uses only inaudible signals at runtime for fast IR synthesis, making it well suited for interactive AAR applications. © 2020 ACM Show more
Publication status
publishedExternal links
Book title
AM '20: Proceedings of the 15th International Conference on Audio MostlyPages / Article No.
Publisher
Association for Computing MachineryEvent
Subject
Room acoustic effects; Room impulse response; Ultrasound; Augmented reality; Auditory perceptionOrganisational unit
03528 - Mattern, Friedemann (emeritus) / Mattern, Friedemann (emeritus)
Notes
Due to the Coronavirus (COVID-19) the conference was conducted virtually.More
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