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US 2025/0097627 A1Published application
Loudspeaker system, signal processing device, and signal processing method
AssigneePanasonic Automotive Systems Co., Ltd.
InventorsFumiyasu KONNO, Tatsuya SHIMIZU
Life of this patent
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Abstract
A loudspeaker system includes: a first vibration actuator that is fixed to a first vibration face and imparts vibration to the first vibration face to cause the first vibration face to emit sound; and a first tweeter that outputs sound in a high-frequency range.
Claims18
A loudspeaker system comprising:
- a vibration actuator that is fixed to a first vibration face and imparts vibration to the first vibration face to cause the first vibration face to emit sound;
- and
- a tweeter that outputs sound in a high-frequency range.
A signal processing device comprising:
- a signal obtainer that obtains sound source data;
- an ultrasonic generator that generates an ultrasonic signal for ultrasound, based on the sound source data obtained;
- and
- a low-frequency generator that generates a low-frequency signal for low-frequency vibration, based on the sound source data obtained, wherein
- the ultrasonic generator:
- adjusts a pitch of the sound source data by a factor of n, n being a real number greater than 1;
- extracts a first frequency component included in the sound source data whose pitch has been adjusted by the factor of n, the first frequency component being greater than or equal to 20 kHz;
- and
- generates the ultrasonic signal by adding the first frequency extracted to the sound source data obtained, and
- the low-frequency generator:
- adjusts the pitch of the sound source data obtained by a factor of 1/l, l being a real number greater than 1;
- extracts a second frequency component included in the sound source data whose pitch has been adjusted by the factor of 1/l, the second frequency component being less than or equal to 90 Hz;
- and
- generates the low-frequency signal by adding the second component extracted to the sound source data obtained.
11 more elements
A signal processing method comprising:
- obtaining sound source data;
- generating an ultrasonic signal for ultrasound, based on the sound source data obtained;
- and
- generating a low-frequency signal for low-frequency vibration, based on the sound source data obtained, wherein
- in the generating of the ultrasonic signal:
- a pitch of the sound source data is adjusted by a factor of n, n being a real number greater than 1;
- a first frequency component included in the sound source data whose pitch has been adjusted by the factor of n is extracted, the first frequency component being greater than or equal 20 kHz;
- and
- the ultrasonic signal is generated by adding the first frequency extracted to the sound source data obtained, and
- in the generating of the low-frequency signal:
- the pitch of the sound source data obtained is adjusted by a factor of 1/l, l being a real number greater than 1;
- a second frequency component included in the
- sound source data whose pitch has been adjusted by the factor of 1/l is extracted, the second frequency component being less than or equal to 90 Hz;
- and
- the low-frequency signal is adjusted by adding the second component extracted to the sound source data obtained.
12 more elements
Dependencies are inferred from the claim text.