Sound control device
First Claim
Patent Images
1. A sound control device to be installed in an interior of a vehicle for controlling the sound in the interior of the vehicle, the sound control device comprising:
- cancel sound signal generation means for generating a signal corresponding to the cancel sound for canceling an engine sound based on an engine revolution number when the engine revolution number is in a first range; and
pseudo-engine sound generation means for generating a signal corresponding to a pseudo-engine sound based on the engine revolution number when the engine revolution number is in a second range, the second range not being overlapped with the first range.
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Abstract
A microcomputer 12 selectively generates signals corresponding to a cancel sound and a pseudo-engine sound respectively based on a rotation number of an engine and causes a switch 23 of a subsequence attenuator ATT 16 to be in an ON condition for attenuating the signal corresponding to the cancel sound if it is generated and causes the switch 23 to be in an OFF condition for passing the signal corresponding to the pseudo-engine sound through it if it is generated.
13 Citations
20 Claims
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1. A sound control device to be installed in an interior of a vehicle for controlling the sound in the interior of the vehicle, the sound control device comprising:
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cancel sound signal generation means for generating a signal corresponding to the cancel sound for canceling an engine sound based on an engine revolution number when the engine revolution number is in a first range; and
pseudo-engine sound generation means for generating a signal corresponding to a pseudo-engine sound based on the engine revolution number when the engine revolution number is in a second range, the second range not being overlapped with the first range. - View Dependent Claims (2, 3)
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4. A sound control device to be installed in an interior of a vehicle for controlling the sound in the interior of the vehicle, the sound control device comprising:
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a sound signal generator for generating a signal corresponding to a pseudo-engine sound and a signal corresponding to a cancel sound for canceling an engine sound selectively based on an engine revolution number; and
an attenuator for receiving the signals corresponding to the cancel sound and to the pseudo-engine sound generated by the sound signal generator and for attenuating only the signal corresponding to the cancel sound. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A sound control device to be installed in an interior of a vehicle for controlling the sound in an interior of the vehicle, the sound control device comprising:
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a microcomputer having a first input to receive information related to a revolution number of an engine of the vehicle and a second input to receive information relating to noise within the interior of the vehicle; and
an attenuator receiving an output of the microcomputer, the output carrying a signal related to a sound operation to be effected on the interior of the vehicle, the attenuator being controlled to a first level when the sound operation is a sound cancellation operation and a second level when the sound operation is a sound generation operation. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification