Headphone
First Claim
1. In a headphone of the type comprising a toroidal seal ring which, in the operational position of the headphone, rests against or surrounds the user'"'"'s ear, is constituted by a soft, yielding, and elastic material, and, with the headphone positioned on the head of the user, forms a coupling space between an active diaphragm, actuated by an electroacoustic transducer, and the auditory canal of the user'"'"'s ear, and which coupling space is substantially sealed from the exterior of the headphone, the improvement comprising, in combination, said coupling space being formed with at least one opening;
- a respective passive oscillatory diaphragm, having a definite self-resonance, mounted in each opening and associated with a sound path leading therefrom and providing, with the associated passive diaphragm, an optimum frequency characteristic.
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Accused Products
Abstract
The headphone preferably comprises a toroidal seal ring which rests against or surrounds the user'"'"'s ear and is constituted of a soft, yielding, and preferably elastic material. The seal ring, with the headphone positioned on the head of a user, forms a coupling space between an active diaphragm, actuated by an electroacoustic transducer, and the auditory canal of the user'"'"'s ear. This coupling space is substantially sealed from the exterior of the headphone, and is formed with at least one opening and preferably several openings each receiving a respective passive oscillatory diaphragm having a definite self-resonance. Each passive diaphragm is associated with a sound path leading therefrom to the open air, to the back side of the active transducer diaphragm, or to acoustically effective cavities. Respective acoustic frictional resistances are associated with each passive diaphragm. The arrangement of the passive diaphragms relative to the active transducer diaphragm may take various forms. The headphone principle is usable with so-called quadrophonic headphones, as well as under the chin headphones and headphones provided with artificial reverberation means such as coil springs.
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Citations
44 Claims
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1. In a headphone of the type comprising a toroidal seal ring which, in the operational position of the headphone, rests against or surrounds the user'"'"'s ear, is constituted by a soft, yielding, and elastic material, and, with the headphone positioned on the head of the user, forms a coupling space between an active diaphragm, actuated by an electroacoustic transducer, and the auditory canal of the user'"'"'s ear, and which coupling space is substantially sealed from the exterior of the headphone, the improvement comprising, in combination, said coupling space being formed with at least one opening;
- a respective passive oscillatory diaphragm, having a definite self-resonance, mounted in each opening and associated with a sound path leading therefrom and providing, with the associated passive diaphragm, an optimum frequency characteristic.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
Specification