This paper explores strategies for achieving accurate wide-area low-frequency sound reproduction in cinemas. Current standards for B-Chain calibration call for single channel low-frequency equalization aided by either single-point or spatially-averaged response measurements, an approach only applicable to a reasonably spatially invariant low-frequency response. A holistic approach to low-frequency coverage optimization is presented exploiting subwoofer arrays, their positioning and multi-point signal processing. Acoustic-field examples are presented using finite-difference time-domain (FDTD) modeling software that expose a potential for superior wide-area signal reconstruction over that achieved using the current standards and recommendations.

Authors: Hill, Adam J.;Hawksford, Malcolm O. J.; Newell, Philip
Affiliations: Acoustic Consultant, Moaña, Spain; University of Derby, Derby, UK; University of Essex, Essex, UK(See document for exact affiliation information.)
AES Conference: 57th International Conference: The Future of Audio Entertainment Technology – Cinema, Television and the Internet (March 2015)
Paper Number: 2-1
Publication Date: March 6, 2015 Import into BibTeX
Subject: Testing and alignment practices for cinemas
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=17610

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 57thPapers)   /conf/57/aes57-000020.pdf

Start a discussion about this paper!