Development of a super-directional loudspeaker with changeable audible range using parabolic reflectors

-Proposal for a mechanism to change the shape of parabolic reflectors and equivalent point sources-

Abstract

The purpose of this study is to develop a super-directional loudspeaker with a variable audible range using a parabolic reflector. This paper proposes a cam-based mechanism for changing the shape of the parabola and a method for changing the audible range by an equivalent point source irradiating the parabola.