Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent
1996-06-10
1997-11-11
Le, Huyen D.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
381154, 381205, 181141, H04R 2500
Patent
active
056872461
ABSTRACT:
Headpiece with a personal proximity sound rig, comprising a rigid support (2), a pad (20) mounted on the support, with a rest part for the rear of the head of the listener, and two sound transmission channels (a) (b) built into the pad on either side of the support, and each comprising at least one electromagnetic transducer (3a, 3b), especially a loudspeaker, transforming an electrical signal into a sound wave, the pad (20) creating, together with the diaphragm, a substantially hermetic anterior cavity (7a, 7b), and at least one sound duct (4a, 4b) positioned with respect to the transducer, running from a sound wave reception end, emerging in a substantially hermetic manner into the cavity (7a, 7b), to an emission end (42a, 42b), the duct having a flow cross-section whose minimum value is less than the apparent area of the diaphragm of the transducer.
REFERENCES:
patent: 4038499 (1977-07-01), Yeaple
patent: 4440443 (1984-04-01), Nordskog
patent: 4490842 (1984-12-01), Watanabe
patent: 5170435 (1992-12-01), Rosen et al.
patent: 5218175 (1993-06-01), Scarlata
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