Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent
1998-03-02
1999-09-07
Kuntz, Curtis A.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
381 711, 381 717, H04R 2500, H03B 2900
Patent
active
059498978
ABSTRACT:
A sound reproduction device such as a headphone with active noise compensation has a housing and a transducer for converting electrical signals to sound waves is disposed within the housing. The transducer has a diaphragm for separating the volume (V.sub.2) in front of the diaphragm from the volume (V.sub.1) to the rear of the diaphragm. The transducer diaphragm and rear volume (V.sub.1) have a determined compliance. The sound reproduction device includes active noise compensation components for reducing unwanted noise at the output of the transducer. The diaphragm has a compliance (N.sub.M) which is less than the compliance (N.sub.1) of the rear volume (V.sub.1). The diaphragm is preferably constructed from a plurality of layers. In a further preferred arrangement, a damping element is disposed very close to the rear side of the diaphragm. A preferred construction for optimizing the voice coil is described. In an active noise compensation construction employing a microphone having a central axis for picking up noise, a preferred arrangement orients the central microphone axis at an angle of about 45.degree. relative to the central axis of the transducer.
REFERENCES:
patent: 4058688 (1977-11-01), Nishimura et al.
patent: 4239945 (1980-12-01), Atoji et al.
patent: 4658931 (1987-04-01), Curry
patent: 4742887 (1988-05-01), Yamagishi
patent: 5148887 (1992-09-01), Murphy
patent: 5181252 (1993-01-01), Sapiejewski et al.
patent: 5182774 (1993-01-01), Bourk
patent: 5208868 (1993-05-01), Sapiejewski
patent: 5305387 (1994-04-01), Sapiejewski
patent: 5343523 (1994-08-01), Bartlett et al.
patent: 5492129 (1996-02-01), Greenberger
patent: 5757946 (1998-05-01), Schyndel
Bartels Volker
Markmann Burkhard
Barnie Rexford N
Kuntz Curtis A.
Sennheiser electronic KG
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