| 摘要 |
PROBLEM TO BE SOLVED: To arrange a speaker and a main equipment at the rear of a screen and to make resident space as wide as possible so as to enhance an acoustic effect by using screen material having sound transmissivity equal to or above a specified value. SOLUTION: For example, the projection screen 1 is arranged on a wall surface R1 of a room R, a projector 2 is arranged ahead of the screen 1, and side speakers 31 and 32 are positioned on both left and right sides of the screen 1, and a center speaker 33 positioned in the center are provided at the rear of the screen 1. The screen 1 is equipped with the screen material 11 and a driving mechanism 10 winding up and unwinding down the screen material 11. Then, the sound transmissivity of the screen material 11 is set to >80%, more desirably, to 90% or more. Thus, the transmissivity of sound from the speaker is enhanced and an output sound pressure level, tone quality and sound directivity characteristics are improved so that the acoustic effect and the image quality are improved.
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