Preventing excessive output of energy when reproducing a three dimensional (3D) sound field

An apparatus and method for representing a three-dimensional (3D) sound field, based on a velocity vector of an acoustic particle is disclosed. A transfer function S610, based on a velocity vector of an acoustic particle and a sound source strength of the acoustic particle, is generated. A cost func...

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Bibliographic Details
Main Authors FILIPPO M FAZI, MIN CHEOL SHIN, JAE HYOUN YOO, KYEONGOK KANG, JEONG IL SEO, PHILIP ARTHUR NELSON
Format Patent
LanguageEnglish
Published 17.04.2013
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
STEREOPHONIC SYSTEMS
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Summary:An apparatus and method for representing a three-dimensional (3D) sound field, based on a velocity vector of an acoustic particle is disclosed. A transfer function S610, based on a velocity vector of an acoustic particle and a sound source strength of the acoustic particle, is generated. A cost function S620 is generated based on a target velocity vector and a represented velocity vector. A set of loudspeaker input signals S630 are then generated that minimizes the cost function based on the transfer function, which aims to prevent the generation of an excessive output. Generation of the transfer function may comprise generating a transfer function matrix based on the radial component of the velocity vector, evaluated at control points arranged on a control circle or sphere with variable radius with respect to an excitation frequency.
Bibliography:Application Number: GB20120018191