| 摘要 |
An electro-acoustical transducer comprising DC atmospheric pressure equalization vents for equalizing pressure in both chambers therein. The sound port of the transducer may be sealed by a sound conducting member preventing gas flow there through. The transducer may have a single vent extending in a plane of a side portion, which vent may have a meandering path or may comprise tapering portions or cavities defining acoustical properties thereof.
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