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Convention Paper

A Method to Reproduce a Directional Sound Source by Using a Circular Array of Focused Sources in Front of a Linear Loudspeaker Array

Authors: Tsutsumi, Kimitaka; Haneda, Yoichi; Noguchi, Ken'ichi; Takada, Hideaki

AES Convention 144 · Paper 9978 · May 2018

Abstract

We propose a method to create a directional sound source in front of a linear loudspeaker array. The method creates a virtual circular loudspeaker array comprising multiple focused sources to reproduce directivity patterns. In the proposed method, the driving functions for the secondary sources are defined as a cascade combination of two driving functions: The first one for directivity control derived by an analytical conversion of circular harmonic modes, and the second one for creating focused sources. The proposed driving functions can deal with directivity rotation by changing the position of focused sources, thereby avoiding recalculations of driving functions. Using computer simulation, we obtained accuracy and algorithmic complexity comparable or better than those of a conventional method.

Details

Published in

AES Convention 144

AES Convention

144

Paper number

9978

Publication date

May 6, 2018

Session subject

Spatial Audio-Part 3

Affiliation

University of Electro-Communications, Japan; NTT Service Evolution Laboratories, Yokosuka, Japan; NTT Service Evolution Laboratories, Kanagawa, Japan (See document for exact affiliation information.)

Type

Convention Paper