Loudspeaker system, mobile body seat, and mobile body

1. A loudspeaker system comprising:

a signal obtainer program that obtains a sound source data;

a first cushion body near which a head of a person is located when the person is seated or recumbent;

a first loudspeaker associated with the first cushion body and outputs ultrasound toward the head;

a second cushion body near which a back of the person is located when the person is seated or recumbent;

a second loudspeaker associated with the second cushion body and outputs low frequency sound toward the back; and

an ultrasound generator program that generates the ultrasound based on the sound source data for the output at the first loudspeaker,

wherein the ultrasound generator program generates the ultrasound by multiplying a pitch of the sound source data by a real number greater than one to generate a frequency of at least 20 kHz in the ultrasound.

2. The loudspeaker system according to claim 1 ,

wherein the second loudspeaker includes a group of loudspeakers that are aligned along a spine of the person.

3. The loudspeaker system according to claim 1 , further comprising:

a third cushion body that comes in contact with at least one of a waist, a hip, and a thigh of the person when the person is seated or recumbent; and

an actuator associated with the third cushion body and outputs low-frequency vibrations toward the at least one of the waist, the hip, and the thigh.

4. The loudspeaker system according to claim 3 , wherein the first loudspeaker associated with the first cushion body, the second loudspeaker associated with the second cushion body, and the actuator associated with the third cushion body are connected together resulting in a mobile body chair configuration.

5. The loudspeaker system according to claim 1 , further comprising:

a third cushion body that comes in contact with at least one of a waist, a hip, and a thigh of the person when the person is seated or recumbent;

an actuator that is provided to the third cushion body and outputs low-frequency vibrations toward the at least one of the waist, the hip, and the thigh; and

a signal generator that generates an ultrasound signal for the ultrasound, an audio signal for the sound, and a low-frequency signal for the low-frequency vibrations, on the basis of sound source data.

6. The loudspeaker system according to claim 5 , further comprising:

a first amplifier that causes the first loudspeaker to output the ultrasound based on the ultrasound signal;

a second amplifier that causes the second loudspeaker to output the sound based on the audio signal; and

a third amplifier that causes the actuator to output the low-frequency vibrations based on the low-frequency signal.

7. The loudspeaker system according to claim 5 ,

wherein the signal generator generates a pseudo moving sound corresponding to a moving state of a mobile body as the sound based on the sound source data.

8. A mobile body seat comprising the loudspeaker system according to claim 1 .

9. A mobile body comprising the mobile body seat according to claim 8 .

10. The loudspeaker system according to claim 1 , wherein when a maximum frequency in the sound source data is lower than 20 kHz, the real number is set to a value that is greater than or equal to the value obtained by dividing 20 kHz by the maximum frequency.

11. The loudspeaker system according to claim 1 , wherein the real number is an m th power of 2.

12. The loudspeaker system according to claim 1 , wherein the ultrasound generator program generates the ultrasound based on specific frequency data components multiplying the pitch of a specific frequency in the sound source data by the real number.

13. The loudspeaker system according to claim 12 , wherein the ultrasound generator program generates the ultrasound by adding the sound source data to the specific frequency data components by multiplying the pitch of the specific frequency by the real number.