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发明公开
CN105527819A 用于报时手表的声辐射膜装置 有权

用于报时手表的声辐射膜装置
摘要：
本发明涉及一种用于报时手表的声辐射膜装置(1)。所述装置包括布置成叠置在第二膜(4)上的第一膜(2)。两个膜的周向边缘部分(21，41)用于将所述膜保持在手表表壳内。第一声辐射膜(2)构造为有效地辐射在第一频段内的频率。第二声辐射膜(4)构造为有效地辐射在与第一频段不同的第二频段内的频率。第一膜和第二膜的周向边缘部分之间还布置有间隔环(3)，以限定声腔。
摘要（英）：

There is provided an acoustic radiating membrane arrangement for a striking or musical watch. The arrangement includes a first membrane arranged superposed on a second membrane. Peripheral edge portions of the two membranes are intended to hold the membranes inside a watch case. The first acoustic radiating membrane is configured to radiate efficiently the frequencies in a first frequency band. The second acoustic radiating membrane is configured to radiate efficiently the frequencies in a second frequency band that is different from the first frequency band. A spacer ring is also disposed between the peripheral edge portions of the first membrane and of the second membrane to define an acoustic cavity.

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