Helmet with built-in speaker system and speaker system for helmet
A speaker system is installed in a helmet, and includes a pair of piezoelectric speakers, frames supporting the speakers around the peripheral edges thereof, and laminated films for protecting the piezoelectric film speakers. Each of the frames has its longer sides curved with a radius of curvature...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
31.10.2006
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| Online Access | Get full text |
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| Summary: | A speaker system is installed in a helmet, and includes a pair of piezoelectric speakers, frames supporting the speakers around the peripheral edges thereof, and laminated films for protecting the piezoelectric film speakers. Each of the frames has its longer sides curved with a radius of curvature of 210 mm to 360 mm in order to support the piezoelectric film speakers in a curved state similarly to the frame. |
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