Patent ID: 9693162
Date: 2017-06-27
CPC Classifications: H04R,H04S

Claim:
1. A system for automatically modifying a firing direction of an upward firing speaker, comprising: an audio output device having at least one upward firing speaker, controlling the upward firing speaker in a testing procedure to output at least one test audio signal respectively at each of multiple testing angles of elevation, selecting one of the testing angles of elevation as a preset angle of elevation according to reception information, and controlled by a mode selection signal in a playing procedure to select one among multiple correction values defined by a mode lookup table, for adjusting the preset angle of elevation so as to control the upward firing speaker to output an audio signal at the adjusted preset angle of elevation; and an audio receiver, located in a receiving area for receiving the test audio signal in the testing procedure, and generating a received audio waveform according to the received test audio signal to create the reception information; wherein the correction values correspond to multiple audio output modes, and the mode selection signal indicates one of the audio output modes, wherein the upward firing speaker outputs the test audio signal at one of the testing angles of elevation in each of multiple time periods, and wherein the reception information comprises a sound intensity feature or a transmission delay feature of the received audio waveform in each of the time periods, wherein the sound intensity feature relates to a difference between intensities of the received audio waveform and of the test audio signal, and the transmission delay feature relates to a time difference between the received audio waveform and the test audio signal.