| 摘要 |
PURPOSE:To make a car-loading speaker compact and improve its tone quality by arranging a number of plane wave plane driving type speakers almost in the same plane adjacently, connecting them in parallel, constituting a single speaker unit, and arranging the required number of speaker units. CONSTITUTION:Circular holes are provided on the plate 11 of a sun visor 1 and a number of plane wave plane driving type speakers SP1 to SP8 are mounted on them. A flexible cushion material 13 is arranged between the plate 11 and a cover 12. Besides, this speaker unit is mounted on the right and left sun visors 1 in a car as a stereo unit. As a result, since sound comes from the front of hearers, the position of a sound source is not unnatural. Further, since the tone quality caused by the excessive inclination of the speaker for the hearers is not deteriorated and sound is produced from both the front and rear of the speaker, the tone quality is not deteriorated even the sun visors are inclined. |
