Speaker system
First Claim
Patent Images
1. A speaker system, comprising:
- a plurality of filters that filter a first signal to generate a plurality of second signals; and
a plurality of speakers that convert the second signals into sound waves, each speaker having a diaphragm and a vibration source installed in the diaphragm, diaphragms of the speakers having at least two different shapes, whereina length of each side of the diaphragms is a multiple of any combination among (1/√
2, 1/√
3, 1/√
4, 1/√
5, 1/√
7, 1/√
11),each side of the diaphragms has a same ratio of the combination,respective transfer characteristics of the diaphragms are different from each other, andeach filter corresponding to the respective transfer characteristics is set such that a transfer characteristic of a synthetic sound wave of the sound waves approaches a target transfer characteristic.
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Abstract
According to one embodiment, a speaker system includes a plurality of filters and a plurality of speakers. The filters filter a first signal to generate a plurality of second signals. The speakers convert the second signals into respective sound waves. Each speaker has a diaphragm and a vibration source installed in the diaphragm. Diaphragms of the speakers have at least two different shapes. Respective transfer characteristics of the diaphragms are different from each other. Each filter corresponding to the respective transfer characteristics is set such that a transfer characteristic of a synthetic sound wave of the respective sound waves approaches a target transfer characteristic.
9 Citations
24 Claims
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1. A speaker system, comprising:
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a plurality of filters that filter a first signal to generate a plurality of second signals; and a plurality of speakers that convert the second signals into sound waves, each speaker having a diaphragm and a vibration source installed in the diaphragm, diaphragms of the speakers having at least two different shapes, wherein a length of each side of the diaphragms is a multiple of any combination among (1/√
2, 1/√
3, 1/√
4, 1/√
5, 1/√
7, 1/√
11),each side of the diaphragms has a same ratio of the combination, respective transfer characteristics of the diaphragms are different from each other, and each filter corresponding to the respective transfer characteristics is set such that a transfer characteristic of a synthetic sound wave of the sound waves approaches a target transfer characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A speaker system, comprising:
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a first filter that filters a first signal to generate a second signal; a second filter that filters the first signal to generate a third signal; a first speaker having a first diaphragm and a first vibration source installed in the first diaphragm, that converts the second signal into a first sound wave; and a second speaker having a second diaphragm and a second vibration source installed in the second diaphragm, that converts the third signal into a second sound wave, wherein a length of each side of the first diaphragm and a length of each side of the second diaphragm are respectively a multiple of any combination among (1/√
2, 1/√
3, 1/√
4, 1/√
5, 1/√
7, 1/√
11),each side of the first diaphragm and each side of the second diaphragm have a same ratio of the combination, respective shapes of the first diaphragm and the second diaphragm are different, respective transfer characteristics of the first diaphragm and the second diaphragm are different, and the first filter and the second filter corresponding to the respective transfer characteristics are set such that a transfer characteristic of a synthetic sound wave of the first sound wave and the second sound wave approaches a target transfer characteristic. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A speaker system, comprising:
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a plurality of filters that filter a first signal to generate a plurality of second signals; a plurality of speakers that convert the second signals into sound waves, each speaker having a diaphragm and a vibration source installed in the diaphragm, diaphragms of the speakers having at least two different shapes; and a sound collector that synthesizes the sound waves to generate a synthetic sound wave, wherein respective transfer characteristics of the diaphragms are different from each other, each filter corresponding to the respective transfer characteristics is set such that a transfer characteristic of the synthetic sound wave approaches a target transfer characteristic, the respective transfer characteristics from each of the diaphragms to the sound collector are Pi, i being a number of the diaphragms having different shapes, the target transfer characteristic is D, respective transfer characteristics of the filters are Hi, and the filters are set so as to satisfy a following equation;
Σ
i=1NPi·
Hi=D.
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22. A speaker system, comprising:
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a plurality of filters that filter a first signal to generate a plurality of second signals; and a plurality of speakers that convert the second signals into sound waves, each speaker having a diaphragm and a vibration source installed in the diaphragm, diaphragms of the speakers having at least two different shapes, wherein respective transfer characteristics of the diaphragms are different from each other, each filter corresponding to the respective transfer characteristics is set such that a transfer characteristic of a synthetic sound wave of the sound waves approaches a target transfer characteristic, the respective transfer characteristics from each of the diaphragms to a listener'"'"'s external auditory canal are Pi, i being a number of the diaphragms having different shapes, the target transfer characteristic is D, respective transfer characteristics of the filters are Hi, and the filters are set so as to satisfy a following equation;
Σ
i=1NPi·
Hi=D.
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23. A speaker system, comprising:
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a first filter that filters a first signal to generate a second signal; a second filter that filters the first signal to generate a third signal; a first speaker having a first diaphragm and a first vibration source installed in the first diaphragm, that converts the second signal into a first sound wave; a second speaker having a second diaphragm and a second vibration source installed in the second diaphragm, that converts the third signal into a second sound wave; and a sound collector that synthesizes the first sound wave and the second sound wave to generate a synthetic sound wave, wherein respective shapes of the first diaphragm and the second diaphragm are different, respective transfer characteristics of the first diaphragm and the second diaphragm are different, the first filter and the second filter corresponding to the respective transfer characteristics are set such that a transfer characteristic of the synthetic sound wave approaches a target transfer characteristic, a transfer characteristics from the first diaphragm to the sound collector is P1, a transfer characteristics from the second diaphragm to the sound collector is P2, the target transfer characteristic is D, a transfer characteristic of the first filter is H1, a transfer characteristic of the second filter is H2, and the first filter and the second filter are set so as to satisfy a following equation;
P1·
H1+P2·
H2=D.
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24. A speaker system, comprising:
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a first filter that filters a first signal to generate a second signal; a second filter that filters the first signal to generate a third signal; a first speaker having a first diaphragm and a first vibration source installed in the first diaphragm, that converts the second signal into a first sound wave; and a second speaker having a second diaphragm and a second vibration source installed in the second diaphragm, that converts the third signal into a second sound wave, wherein respective shapes of the first diaphragm and the second diaphragm are different, respective transfer characteristics of the first diaphragm and the second diaphragm are different, the first filter and the second filter corresponding to the respective transfer characteristics are set such that a transfer characteristic of a synthetic sound wave of the first sound wave and the second sound wave approaches a target transfer characteristic, a transfer characteristics from the first diaphragm to a listener'"'"'s external auditory canal is P1, a transfer characteristics from the second diaphragm to the listener'"'"'s external auditory canal is P2, the target transfer characteristic is D, a transfer characteristic of the first filter is H1, a transfer characteristic of the second filter is H2, and the first filter and the second filter are set so as to satisfy a following equation;
P1·
H1+P2·
H2=D.
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Specification