ACOUSTIC APPARATUS AND OSCILLATING UNIT

摘要

In the present disclosures, a portable telephone (100) detects at least the direction of the position of vocalization of a user from the sound input to a plurality of microphones (121, 122), and controls the direction of sound output of a speaker unit (110) towards the detected position of vocalization. As a result, it is possible to provide a sufficient volume of sound to only a particular user without generating noise in the periphery. The microphones may form a matrix with piezoelectric oscillating elements that configure the speaker unit, or may be separate from the speaker unit.