AES E-Library

Near and Far-field Control of Focused Sound Radiation Using a Loudspeaker Array

In this paper, a sound manipulation technique is proposed to prevent unwanted eavesdropping or disturbing others in the vicinity if a multimedia device is being used in a public place. This is capable of realizing to create a spatial region having highly acoustic potential energy at the listener’s position. For doing so, the paper discusses the design of multi-channel filters with a given the spatial directivity pattern for a given arbitrary loudspeaker array configuration. Firstly some limitations in using conventional beamforming technique are presented, and then a novel control strategy is suggested for reproducing a desired acoustic property in a spatial area of interest close to the loudspeaker array. This technique also allows us to control an acoustic property in area relatively far from the array with a single objective function. In order to precisely produce a desired shape of energy distribution in both areas, spatial weighting technique is introduced. The results are compared with those from controlling each area separately.

Authors: Choi, Jung-Woo; Kim, Youngtae; Ko, Sangchul
Affiliation: Samsung Electronics Co. Ltd., Gyeonggi-do, Korea
AES Convention:129 (November 2010) Paper Number:8198 Import into BibTeX
Subject:Audio Processing

Click to purchase paper 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 $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 129Papers)   /129/8198.pdf

Start a discussion about this paper!