Speaker and audio-visual system
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsAtsushi Sakaguchi, Shuji Saiki, Toshiyuki Matsumura
Life of this patent
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Abstract
A speaker includes a diaphragm and a magnetic circuit, a plurality of acoustic paths that provide connection between a space formed on a side including the magnetic circuit with respect to the diaphragm and a space exterior to the speaker are formed in the magnetic circuit, and the plurality of acoustic paths include a first acoustic path and a second acoustic path that differs in acoustic impedance from the first acoustic path.
Claims13
A speaker comprising:
- a diaphragm;
- a magnetic circuit;
- and
- a first damper,
- wherein a first sound conduit tube and a second sound conduit tube, each of which provides a connection between a space formed on a side including the magnetic circuit with respect to the diaphragm and a space exterior to the speaker, are formed in the magnetic circuit,
- wherein a peripheral portion of the first damper is disposed directly on a surface of the magnetic circuit so as to cover an opening of the first sound conduit tube,
- wherein the first damper does not support the diaphragm,
- wherein a first acoustic impedance provided by the first sound conduit tube and the first damper differs from a second acoustic impedance provided by the second sound conduit tube of which an opening is not covered by the first damper.
A speaker comprising
- a diaphragm;
- a magnetic circuit;
- and
- a damper having a bore,
- wherein a sound conduit tube that provides a connection between a space formed on a side including the magnetic circuit with respect to the diaphragm and a space exterior to the speaker is formed in the magnetic circuit,
- wherein a peripheral portion of the damper is disposed on a surface of the magnetic circuit so that an opening of the damper directly contacts an opening of the sound conduit tube,
- wherein the damper does not support the diaphragm,
- wherein a first acoustic impedance provided by the sound conduit tube and the damper excluding the bore differs from the acoustic impedance provided by the conduit tube and the bore of the damper.
An audio-visual system that includes a television, a cellular phone, a smartphone, a tablet terminal, an earphone, a hearing aid, or a vehicle comprising the speaker,
- wherein the speaker includes:
- a diaphragm;
- a magnetic circuit;
- a first damper,
- wherein a first sound conduit tube and a second sound conduit tube, each of which provides a connection between a space formed on a side including the magnetic circuit with respect to the diaphragm and a space exterior to the speaker, are formed in the magnetic circuit,
- wherein a peripheral portion of the first damper is disposed directly on a surface of the magnetic circuit so as to cover an opening of the first sound conduit tube,
- wherein the first damper does not support the diaphragm,
- wherein a first acoustic impedance provided by the first sound conduit tube and the first damper differs from a second acoustic impedance provided by the second sound conduit tube of which an aperture is not covered by the first damper.
An audio-visual system that includes a television, a cellular phone, a smartphone, a tablet terminal, an earphone, a hearing aid, or a vehicle comprising the speaker,
- wherein the speaker includes:
- a diaphragm;
- a magnetic circuit;
- and
- a damper having a bore,
- wherein a sound conduit tube that provides a connection between a space formed on a side including the magnetic circuit with respect to the diaphragm and a space exterior to the speaker is formed in the magnetic circuit,
- wherein a peripheral portion of the damper is disposed on a surface of the magnetic circuit so that an opening of the damper directly contacts an opening of the sound conduit tube,
- wherein the damper does not support the diaphragm,
- wherein a first acoustic impedance provided by the sound conduit tube and the damper excluding the bore differs from the acoustic impedance provided by the conduit tube and the bore of the damper.
Dependencies are inferred from the claim text.