| 摘要 |
PROBLEM TO BE SOLVED: To provide a loudspeaker capable of recognizing the information on sound waves while protecting a sounding body. SOLUTION: A loudspeaker 10 is provided with a sounding body 11. The sounding body 11 is composed of hemispherical shell ceramics. The sounding body 11 is arranged on the upper surface of a cabinet 12 and on the upper surface side of the cabinet 12, a lid body 14 covering the sounding body 11 is arranged. Inside the cabinet 12, an LED 15 is arranged and a concave mirror 16 is arranged on the inner surface of the lid body 14. Light from the LED 15 is emitted from an emitting port 17 formed on the cabinet 12 toward the inner surface of the lid body 14, and the concave mirror 16 on the inner surface of the lid body 14 is irradiated and illuminated in the color of light of the LED 15. At such a time, the concave mirror 16 is irradiated with light corresponding to the frequency or level of sonic waves radiated by the sounding body 11 from the LED 15 and the frequency or level of sounds are visually reported. |
