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Headphoning

  • US 4,455,675 A
  • Filed: 04/28/1982
  • Issued: 06/19/1984
  • Est. Priority Date: 04/28/1982
  • Status: Expired due to Fees
First Claim
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1. Headphone apparatus comprising,driver means for converting an input electrical signal into an acoustical output signal and having a vibratable diaphragm,housing means for supporting said driver means and having a cushion supporting bracket,cushion means for engagement with said cushion supporting bracket and formed with a centra1 opening defining a cavity accommodating said diaphragm for establishing a seal between said cushion supporting bracket and an outer ear to inhibit air flow between said cavity and the region outside said apparatus to significantly attenuate spectral components through the middle frequency range,and electroacoustical means separate from said driver means for transducing an acoustical pressure signal in said cavity to a corresponding transduced electrical signal,said electroacoustical transducing means being closely adjacent to said diaphragm and sufficiently close to the edge of said cavity away from said cushion support means so that said transducing means is responsive to the pressure in said cavity near the ear.

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