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Ultra-Thin Micro-Loudspeaker Using Oblique Magnetic Circuit.

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More and more functions are installed to a mobile phone but the size of the handset has become smaller. Devices installed in the mobile phone have been required to be downsized or thinner. Micro-loudspeaker installed to the mobile phone is required to be thinner. They are required both becoming thinner and reproducing high quality sound. However, it has been very difficult to make thinner micro-loudspeaker without deteriorating the acoustic performance because the structure of conventional dynamic micro-loudspeaker is not suitable to be thinner. We have succeeded in developing an ultra-thin micro-loudspeaker using Oblique Magnetic Circuitwhich is 1.5mm thick (45% thinner than conventional dynamic micro-loudspeaker) without sacrificing sound quality.

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