Apparatus and method for controlling distortions of amplifier

Method of and apparatus for controlling sound field through array speaker

Apparatus and method for estimating power amplifier

Sound enhancement apparatus and method

APPARATUS AND METHOD FOR GENERATING AN ACOUSTIC RADIATION PATTERN

Apparatus and method for generating directional sound

APPARATUS AND METHOD FOR SOUND FOCUSING

Apparatus and Method for Generating Directional Sound

Directional sound generating apparatus and directional speaker array

APPARATUS AND METHOD OF PROCESSING SOUND