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Document Number
US Patent 4027117
Issued Date
May 31, 1977
Link
Inventors
Nakamura; Komatsu (Niiza, Saitama,JA)
Map
Abstract
A headphone supported at the ear position for reproducing sound comprises (a) an oscillating member for sound reproduction, (b) a frame to support the oscillating member, (c) at least one opening constituting a path from the space, defined by the inside of the oscillating member, an ear pad and the ear to the free space on the outside of the oscillating member, and (d) an acoustic resistance member disposed in the opening.
Drawing
Headphone - US Patent 4027117 Drawing
Drawing from US Patent 4027117
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Number of Claims:
5
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no comments yet
Owner
Published
May 31, 1977
Application Number
05/628,843
Filed
November 4, 1975
US Classification
381/372   381/348 381/354
Int'l Classification
H04R   1/10   (20060101)   H04R   1/22   (20060101)  
Priority Data
Nov 13, 1974 [JA] 49-136634[U]
USPTO Field of Search
179/180   179/182R  
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