| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an acoustic system with excellent portability and usability, which can be easily carried as an accessory. <P>SOLUTION: An acoustic system includes an acoustic unit to be mounted on a vibrator; and a cord integrated amplifier to output an amplified audio signal to the audio unit. The audio unit includes a permanent magnet 121; a magnet holder 122 provided with a concaved housing part to house the permanent magnet 121; a paper cylinder 123 housed in a gap between a side face of the permanent magnet 121 and a side face of the housing part 122A of the magnet holder 122 in a freely oscillating manner, to support a coil 124 surrounding the permanent magnet 121; and a conductor 126 attached to an end of the paper cylinder 123 to oscillate the vibrator. The cord integrated amplifier includes a secondary battery in a flat shape; and an amplifier circuit to amplify an audio signal with the secondary battery as a power source. The conductor 126 conducts oscillation of the coil 124, based on an audio signal output from a jack, through the paper cylinder 123, and outputs audio from the vibrator. <P>COPYRIGHT: (C)2012,JPO&INPIT |
