OSCILLATION APPARATUS AND OSCILLATION METHOD

摘要

PROBLEM TO BE SOLVED: To minutely control a region in which an audible sound is demodulated, in a parametric speaker.SOLUTION: A speaker array 10 has a constitution in which plural oscillators 100 are arranged in an array (two-dimensionally), where the oscillators 100 may be arranged linearly. A controller 20 inputs an oscillation signal to each of the oscillators 100 to cause each of the oscillators 100 to output acoustic waves. The oscillation signal is a modulation signal for a parametric speaker or a carrier signal with the same frequency as the modulation signal. The controller 20 selects between the modulation signal and the carrier signal to input to at least one of the oscillators 100, or to input neither signal.