| 摘要 |
PROBLEM TO BE SOLVED: To increase the sound output effect of a high-frequency voice output part, to prevent the effects of sound image localization due to back pressure, to prevent sound image localization at a low-frequency sound output part, and to localize sound forward by providing a 1st box made of a high specific-gravity material and a 2nd box which has a multi-layered external wall. SOLUTION: A squawker box 142 is formed of plastics being the high-specific- gravity material almost in a rectangular parallelepiped shape and has opening parts 142a and 142b on the front and back sides respectively. A squawker is fitted in the front opening part 142a of the squawker box 142. A sound absorber 146 is put around inside surfaces other than the front of the squawker box 142. This sound absorber 146 is composed of a rectangular plate type sound absorber 146a, stuck inside the two opposite facing flanks of the squawker box 142 and a U-sectioned sound absorber 146b, which is stuck closing the back-side opening part 142b from inside other two opposite flanks of the squawker box 142. |
