System and method for controlling sound volume

Abstract

The invention relates to a system and a method for controlling sound volume, which is applied to an electronic device which can be connected with various power supply units and is provided with a switching unit used to be connected with the power supply units and a loudspeaker unit used for outputting sound, wherein the power supply units are provided with power supply signals with different magnitudes. The system prestores audio frequency amplification parameter values of an electrical mode of the power supply signals of the corresponding power supply units, detects the electrical mode of the power supply signals through a control module when the switching unit receives one power supply signal of the power supply units, generates control signals according to the electrical mode of the power supply signals, and outputs the control signals to an audio frequency amplifying unit. The audio frequency amplifying unit can select the corresponding audio frequency amplification parameter values according to the control signals to amplify audio frequency signals when receiving the audio frequency signals generated by the electronic device and the control signals, and outputs the audio frequency signals to the loudspeaker unit so as to make the loudspeaker unit output sound with corresponding sound volume. Therefore, the system and the method can properly adjust the sound volume output by the loudspeaker unit.

Description

technical field [0001] The present invention relates to a volume control system and method. More specifically, the present invention is a speaker that can be connected to a variety of power supply units and has a switching unit for connecting the power supply unit and a speaker for outputting sound. The electronic device of the unit, and the volume control system and method for adjusting the output volume of the electronic device when switching the power provided by the power supply unit. Background technique [0002] In today's life, consumer electronic products, such as notebook computers, mobile phones, personal digital assistants, etc., are becoming more and more popular, thus making people's daily life more convenient. Taking the notebook computer as an example, it has become an indispensable data processing tool in people's daily work and life, and can be used for word processing, game entertainment, multimedia playback and so on. [0003] Current notebook computers g...

AI Technical Summary

Problems solved by technology

[0004] However, since the output voltage of the external power supply is different from that of the battery, the output voltage of a general notebook computer power adapter (Adaptor) is 19 volts, while the battery only provides an output voltage of 11.1 volts, which is quite different. There will be some problems when actually switching the power supply for power supply

For example, when a user uses a notebook computer to use multimedia playback functions such as watching movies or listening to music, if the power adapter is unplugged at this time, and the battery is used for power supply as described above, or the battery is used for power supply first, and then the power adapter is plugged in. The power adapter is powered by an external power supply. Since the audio amplifier in the notebook computer is also powered by the above two power sources, once the power supply unit is changed and switched, the audio amplifier will output audio at the moment of switching the power supply unit. The volume of the signal jumps, that is, the sound that the user hears suddenly becomes lighter or suddenly soars, which can easily cause the user's bad perception. In severe cases, it will even affect the user's hearing and the life of the speaker.

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