Speaker and headphone device
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United States of America Patent
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May 22, 2018
Issued Date -
N/A
app pub date -
Jul 19, 2016
filing date -
Jul 24, 2015
priority date (Note) -
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Abstract
A speaker includes: an open-backed speaker unit, a housing, and a fin unit. The housing is disposed so as to cover a rear side of the speaker unit, and forms a back cavity with the speaker unit. The fin unit is disposed in the back cavity, and includes an annular or arc-like fin, which approaches a rear side of the housing as going from a center of the speaker unit toward an outer diameter side thereof, and expands in diameter as separating from the speaker unit.
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Family
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