| 摘要 |
A speech aid device having a housing with two ends. A sounding head is secured to one end of housing and a solenoid is disposed in the housing. A post affixed to the solenoid has an end operatively associated with the sounding head. The post has an annular groove therein. A diaphragm having a periphery supported by and connected to the housing is captured in the groove. The diaphragm is constructed from an elastomer such as silicone and has a plurality of annular ridges.
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