The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1976
Filed:
Mar. 03, 1975
Robert Lee Wallace, Jr, Warren Township, Somerset County, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A binaural sound recording and reproduction system which utilizes a recording mannequin equipped with an electroacoustic model of the human auditory tract to thereby record the sound pressure which would be incident on a listener's eardrum and also utilizes a headset with in-ear transducers or receivers which exhibit a flat frequency response as measured at the listener's eardrums is described. The receiver units utilize acoustic impedance matching to the listener's ear canal to effect the flat frequency response characteristic. An electrical equalizer circuit to facilitate the use of the subject in-ear receivers with conventionally recorded sound is also disclosed.