| 主权项 |
1. An audio sound reproduction system, comprising:
an audio frequency sound transducer system configured to emit an audio sound within a space comprising an audio beamwidth, wherein the audio sound is based on an audio signal; an ultrasonic sound transducer component configured to emit modulated ultrasonic sound energy in at least one ultrasonic sound direction, each ultrasonic sound direction having a respective ultrasonic beamwidth that is less than and within the audio beamwidth, wherein the modulated ultrasonic sound energy is based on a modulated ultrasonic sound signal; an object detector configured to:
determine a respective object location for at least one object within the audio beamwidth, the respective object locations being independent of the ultrasonic beamwidth; andproduce a respective indication of the respective object location for the at least one object; and an ultrasonic signal generator, coupled to the object detector, configured to generate the modulated ultrasonic sound signal, the ultrasonic signal generator configured to generate, based on the respective indication, the modulated ultrasonic sound signal such that the modulated ultrasonic sound energy emitted by the ultrasonic sound transducer creates an audible cancellation sound with an amplitude substantially equal to an amplitude of the audio sound at the respective object location so as to combine with and cancel the audio sound at the respective object location by being substantially out of phase with the audio sound along each ultrasonic sound direction. |
