| 摘要 |
A device of a rear speaker channel for a car audio by using hypersonic is provided to reproduce with complete fidelity by removing a noise inputted to a conventional rear speaker wiring. A device of a rear speaker channel for a car audio(1) by using a hypersonic wave includes an ultrasonic generator(2), a modulator(3), an ultrasonic wave amplifier(4), and an ultrasonic transducer(5). The ultrasonic generator(2) generates an ultrasonic wave. A modulator(3) generates a second ultrasonic wave signal by modulating a first ultrasonic wave signal from the ultrasonic wave generator(2) and a sound source from the car audio(1). The ultrasonic wave amplifier(4) amplifies the second ultrasonic wave signal applied from the modulator(3) to transmit the amplified signal to the ultrasonic transducer(5). The ultrasonic transducer(5) converts the second ultrasonic wave signal to an ultrasonic pressure wave received from the ultrasonic amplifier(4) to transmit the converted signal to the outside. |
