Noise preventing module and its public address set

A technology of amplifying device and abnormal sound, which is applied to transducer circuits, sensors, electrical components, etc., can solve the problems of damage to loudspeakers, reduce the service life of loudspeakers, and reduce customers' evaluation and trust in products. Reduce the chance of damage and improve the quality of the effect

Inactive Publication Date: 2008-01-23
TATUNG COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the power is turned off, the abnormal sound caused by the noise will damage the loudspeaker,

Method used

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  • Noise preventing module and its public address set
  • Noise preventing module and its public address set
  • Noise preventing module and its public address set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] Please refer to FIG. 1 , which is a block diagram of a sound amplifying device according to an embodiment of the present invention. The sound amplifying device 100 includes a sound processor 120 , a sound amplifier 130 , a sound amplifying speaker 140 and an abnormal sound prevention module 110 . The sound amplifier 130 is coupled between the loudspeaker 140 and the sound processor 120 . The abnormal sound prevention module 110 is coupled to the sound amplifier 130 for outputting the mute control signal MUT to the sound amplifier 130 .

[0044] The sound processor 120 receives sound effect data AUD (such as digital sound effect data) and converts it into an audio signal AUS (such as an analog audio signal). After the audio signal AUS is adjusted or gained by the sound amplifier 130 , the amplified signal AAS is outputted through the amplified speaker 140 . Under normal power supply, the sound processor 120 is coupled to the first working voltage VCC1, and the sound am...

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PUM

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Abstract

The present invention relates to an abnormal sound preventing module and the sound amplification device, which are used to prevent the sound amplification device from generating abnormal sounds when a power supply is turned off. The sound amplification device comprises a sound amplifier, a sound processor, an abnormal sound preventing module and a loudspeaker, wherein the sound processor is coupled to a first working voltage, and the sound amplifier is coupled to a second working voltage. When a power supply is turned off, the abnormal sound preventing module outputs static sound control signals to the sound amplifier according to the voltage difference between the first working voltage and the second working voltage. The sound amplifier can avoid that the loudspeaker generates abnormal sounds according to static sound control signals.

Description

technical field [0001] The invention relates to a circuit for preventing abnormal sound, and in particular to an abnormal sound preventing module and a sound amplifying device for preventing abnormal sound from being generated due to instantaneous pulses when the power is turned off. Background technique [0002] Traditional sound amplifiers usually produce abnormal sounds when the power is turned off, such as the abnormal sound of "Peng". Because when the AC power is turned off, the sound processor in the amplifying device will lose its function, and the amplifying speaker cannot be kept in a muted state. The sudden pulse or noise generated by the circuit when the power is turned off will cause the speaker to produce abnormal sound, which will cause damage to the loudspeaker. [0003] Since the traditional sound amplification device is not designed to prevent the generation of abnormal sound circuit when the power is turned off. Therefore, when the power is turned off, th...

Claims

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Application Information

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IPC IPC(8): H04R3/00
Inventor 曾世华
Owner TATUNG COMPANY
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