Title: Audio-frequency processing device and sound-volume management method
Application Number: 200510101991 Application Date: 2005.11.30
Publication Number: 1980054 Publication Date: 2007.06.13
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03G3/20
Applicant(s) Name: Hongfujin Precision Industry Co., Ltd., Shenzhen Address:
Inventor(s) Name: Xie Guanhong;Li Xiaoguang;Lian Wenchuan;Cai Wenshe
Attorney & Agent:
Abstract:
    When listener adjusts volume manually, the volume management system executes following steps: calculating out an average noise volume level in a prearranged time period, and setting up the average noise volume level as a reference noise volume level; hereafter, calculating current average noise volume level periodically, and calculating variable rate of current average noise volume level compared with the reference noise volume level; at same time, calculating audio energy value of audio signal periodically; based on the variable rate, and audio energy value to adjust the audio energy value, and calculating out preferred gain value; sending the preferred gain value to a volume control unit to carry out magnifying audio signal. In the environment, where noise volume is changed frequently, the invention can reduce number of manual operation by listener, and let listener listens in audio under proper volume level.
Time: 14