To provide an acoustic wave direction control member capable of improving sound volume reduction performance of a desired region while suppressing an increase in weight.SOLUTION: An acoustic wave direction control member 100 controls the direction of an acoustic wave S passing through itself to travel to a radiation space (predetermined space) 1. The acoustic wave direction control member 100 increases in density in a direction Y which is an extending direction. The density, namely, a solid part other than a gap increases in the direction Y, so that the acoustic wave S passing through the acoustic wave direction control member 100 increases in acoustic velocity at a position where the density increases. Consequently, the acoustic wave S having passed through the acoustic wave direction control member 100 is refracted to a direction in which the density increases in the extending direction in the radiation space 1.SELECTED DRAWING: Figure 1
【課題】重量増加を抑制しつつ、所望の領域の音量低減性能を向上させることが可能な音波方向制御部材を提供する。【解決手段】音波方向制御部材100は、自身を通過して放射空間(所定空間)1へと進行する音波Sの方向を制御する。音波方向制御部材100は、延在方向である方向Yに沿って密度が増加する。方向Yに沿って密度すなわち空隙以外の固体部分が増加するため、音波方向制御部材100を通過する音波Sは、密度が増加する位置ほど音速が増加することになる。その結果、音波方向制御部材100を通過した音波Sは、放射空間1において、延在方向の密度が増加する方向へと屈折して進行する。【選択図】図1
ACOUSTIC WAVE DIRECTION CONTROL MEMBER
音波方向制御部材
2020-02-06
Patent
Electronic Resource
Japanese
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