Invention Grant
US08771350B2 Air-operated speech aid 有权
航空助听器

Air-operated speech aid
Abstract:
An air-operated speech aid that includes a cover cup, a tube, a sound guide tube, a gasket, and an internal tube. The cover cup of the speech aid is provided with a breathing hole, and a side of the breathing hole is clasped into a soft air gate. One end of the sound guide tube is encased in a sleeve or a mask type cover member.
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