Personal audio systems by using tangent line method:

Effects of frequency and case body on acoustic confinement

Abstract

Personal audio based on tangent line method (TLM) has been proposed by one of the authors. Since TLM works well at high frequencies rather than low frequencies, the robustness of the proposed method against low frequencies is verified in this study. Moreover, the loudspeaker array used in the proposed method is designed assuming that there is no case body of the loudspeaker array. In other words, free space is assumed in the design process. Hence, the robustness of the proposed method against a case body is also verified.