Pop sound prevention module and speaker apparatus thereof

Details Pop sound prevention module and speaker apparatus thereof Pop sound prevention module and speaker apparatus thereof

2011-07-05

2011-07-05

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Noise or distortion suppression

C381S094500

Reexamination Certificate

active

07974419

ABSTRACT:
A pop sound prevention module and a speaker apparatus thereof are provided. The pop sound prevention module is used for preventing the speaker apparatus generating a pop sound when a power shuts down. The speaker apparatus includes an audio amplifier, an audio processor, the pop sound prevention module, and a loudspeaker. The audio processor is coupled to a first operation voltage. The audio amplifier is coupled to a second operation voltage. When the power shuts down, the pop sound prevention module outputs a mute control signal to the audio amplifier according to voltage difference between the first operation voltage and the second operation voltage. According to the mute control signal, the audio amplifier prevents the loudspeaker from generating a pop sound.

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“1st Office Action of China Counterpart Application”, issued on Oct. 29, 2010, p. 1-4, in which the listed reference was cited.

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