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    • 4. 发明授权
    • Sound channel for a hearing apparatus and corresponding production process
    • 听力仪器的声道和相应的生产过程
    • US08094849B2
    • 2012-01-10
    • US12284142
    • 2008-09-18
    • Björn FreelsHolger Kral
    • Björn FreelsHolger Kral
    • H04R25/00
    • H04R25/658H04R1/34
    • A mechanically more stable and more complexly molded sound channel is to be provided for a hearing apparatus. Provision is made to this end for a sound channel, which has three sections in the longitudinal direction, the middle section of which has a different curvature or a larger internal circumference than the two outer sections, to be produced by injection molding. Here a negative of the sound channel is fixed within the injection molded form, with the negative consisting of a first material. The injection molded form with a second material, which has a higher melting point than the first material, is then extruded. The negative is then melted or burnt out of the cast sound channel. Very complex sound channel forms, for instance also with cavities and branching, can be realized in this way.
    • 要为听力设备提供机械上更稳定和更复杂的模制声音通道。 为此,为了通过注射成型产生的声道在纵向方向上具有三个部分,其中部具有与两个外部部分不同的曲率或更大的内圆周的声道。 这里,声音通道的负值固定在注射成型中,负极由第一种材料构成。 然后挤出具有比第一材料更高的熔点的第二材料的注射成型。 然后,消极的东西被熔化或烧毁了铸造的声道。 非常复杂的声音通道形式​​,例如也可以通过空腔和分支来实现。