Discrete driving functions for horizontal reproduction using Wave Field Synthesis and Higher Order Ambisonics

Cesar Daniel Salvador Castaneda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Practical implementations of physics-based spatial sound reproduction techniques, such as Wave Field Synthesis (WFS) and Higher Order Ambisonics (HOA), require real-time filtering, scaling and delaying operations on the audio signal to be spatialized. These operations form the so-called loudspeaker's driving function. This paper describes a discretization method to obtain rational representations, in the unit circle of the z-plane, of the continuous 2.5D-WFS and 2D-HOA driving functions for horizontal reproduction. Visual and numerical comparisons between continuous and discrete driving functions, and between continuous and discrete sound pressure fields, synthesized with circular loudspeaker arrays, are shown. Percentage discretization errors, in the reproducible frequency range and in the whole listening area, are on the order of 1%. A methodology for immersive soundscapes reconstruction composed with nature sounds is also reported as a practical application.

Original languageEnglish
Title of host publication129th Audio Engineering Society Convention 2010
Pages210-223
Number of pages14
Volume1
Publication statusPublished - 2010 Dec 1
Externally publishedYes
Event129th Audio Engineering Society Convention 2010 - San Francisco, CA, United States
Duration: 2010 Nov 42010 Nov 7

Other

Other129th Audio Engineering Society Convention 2010
Country/TerritoryUnited States
CitySan Francisco, CA
Period10/11/410/11/7

ASJC Scopus subject areas

  • Modelling and Simulation
  • Acoustics and Ultrasonics

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