Wave field synthesis using fractional order systems and fractional delays

César D. Salvador

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

1 Citation (Scopus)

Abstract

A discretization of the generalized 2.5D wave field synthesis driving functions is proposed in this paper. Time discretization is applied with special attention to prefiltering that involves half-order systems and to delaying that involves fractional-sample delays. Space discretization uses uniformly distributed loudspeakers along arbitrarily shaped contours. Visual and numerical comparisons between continuous and discrete synthesis with line, square and circular arrays are shown. An immersive soundscape composed of nature sounds is reported as example. Simulations have been done with MATLAB and real-time reproduction with Pure Data. Simulations of synthesized plane and spherical wave fields, in the whole listening area, report a percentage discretization error of less than 1%, using a 5 th order IIR filter for prefiltering and a 3 rd order IIR filter per channel for fractional delaying.

Original languageEnglish
Title of host publication128th Audio Engineering Society Convention 2010
Pages1860-1870
Number of pages11
Publication statusPublished - 2010 Dec 1
Event128th Audio Engineering Society Convention 2010 - London, United Kingdom
Duration: 2010 May 222010 May 25

Publication series

Name128th Audio Engineering Society Convention 2010
Volume3

Other

Other128th Audio Engineering Society Convention 2010
CountryUnited Kingdom
CityLondon
Period10/5/2210/5/25

ASJC Scopus subject areas

  • Modelling and Simulation
  • Acoustics and Ultrasonics

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