| 摘要 |
PROBLEM TO BE SOLVED: To provide a directivity acoustic system capable of converging sound formed by a radiation sound wave of a super-directivity speaker to a prescribed limited space. SOLUTION: A radiator 1 for receiving a signal resulting from modulating an ultrasonic wave carrier signal with an audible tone signal and emitting an ultrasonic wave is installed on one side 10 in two sides facing with each other with a space inbetween, a spherical dome 2 having the radiator 1 as its center axis is formed to the one side 10 including the radiator 1 or the other side 11, and the spherical dome 2 has a spherical face 21 on which an incident angle and a reflecting angle of a secondary sound wave 4 resulting from a primary sound wave 3 of the radiator 1 reflected in the other side or the primary sound wave 3 are the same. COPYRIGHT: (C)2005,JPO&NCIPI |
