Speaker device and acoustic system
AssigneeFoster Electric Company, Limited
InventorTakeshi Yamamoto
Life of this patent
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Abstract
A speaker device includes: a limiting unit that limits a signal band of a sound source signal that has been input; a speaker unit that includes a diaphragm; a housing that houses the speaker unit; and a drive circuit that, based on the sound source signal with the limited signal band, outputs a control signal that causes the diaphragm of the speaker unit to vibrate, wherein: the limiting unit limits the sound source signal to a frequency band including a peak frequency of frequency characteristics of an amplitude of the speaker unit in accordance with a shape of the speaker unit and a shape of the housing.
Claims6
A speaker device comprising:
- a limiting unit that limits a signal band of a sound source signal that has been input;
- a speaker unit that includes a diaphragm;
- a housing that houses the speaker unit and includes a resonant structure;
- and
- a drive circuit that, based on the sound source signal with the limited signal band, outputs a control signal that causes the diaphragm of the speaker unit to vibrate, wherein:
- the limiting unit limits the sound source signal to a frequency band that includes a peak frequency of frequency characteristics of an amplitude of the speaker unit in accordance with a shape of the speaker unit and a shape of the housing;
- the housing is a base reflex type enclosure;
- and
- the resonant structure is a duct.
A speaker device comprising:
- a limiting unit that limits a signal band of a sound source signal that has been input;
- a speaker unit that includes a diaphragm;
- a housing that houses the speaker unit;
- and
- a drive circuit that, based on the sound source signal with the limited signal band, outputs a control signal that causes the diaphragm of the speaker unit to vibrate, wherein:
- the limiting unit limits the sound source signal to a frequency band that includes a peak frequency of frequency characteristics of an amplitude of the speaker unit in accordance with a shape of the speaker unit and a shape of the housing;
- the limiting unit limits a low frequency side of the frequency band;
- the housing includes a resonant structure;
- and
- the resonant structure has a resonance frequency that adjusts a system resonance frequency corresponding to an upper limit of the frequency band to be limited.
A speaker device comprising:
- a limiting unit that limits a signal band of a sound source signal that has been input;
- a speaker unit that includes a diaphragm;
- a housing that houses the speaker unit;
- and
- a drive circuit that, based on the sound source signal with the limited signal band, outputs a control signal that causes the diaphragm of the speaker unit to vibrate, wherein:
- the limiting unit limits the sound source signal to a frequency band that includes a peak frequency of frequency characteristics of an amplitude of the speaker unit in accordance with a shape of the speaker unit and a shape of the housing, and
- a clearance between parts of the speaker unit is based on a maximum amplitude of the speaker unit.
A speaker device comprising:
- a limiting unit that limits a signal band of a sound source signal that has been input;
- a speaker unit that includes a diaphragm;
- a housing that houses the speaker unit;
- and
- a drive circuit that, based on the sound source signal with the limited signal band, outputs a control signal that causes the diaphragm of the speaker unit to vibrate, wherein:
- the limiting unit limits the sound source signal to a frequency band that includes a peak frequency of frequency characteristics of an amplitude of the speaker unit in accordance with a shape of the speaker unit and a shape of the housing, and
- the speaker unit is a counter drive type speaker unit.
Dependencies are inferred from the claim text.