Automatic noise lowering method, device and system of projector

Abstract

The embodiment of the invention provides an automatic noise lowering method, device and system of a projector. The method includes the steps that the real-time rotating speed data of a fan of the projector are acquired, and the real-time noise data of the fan of the projector are acquired; according to the real-time rotating speed data and the corresponding relation between preset rotating speed data and noise lowering audio, the noise lowering audio corresponding to the real-time rotating speed data is acquired; audio signals given out by a loudspeaker of the projector are adjusted according to the noise lowering audio so that the sound given out by the loudspeaker of the projector can be synchronous with the real-time noise data, opposite to the real-time noise data in phase position and same as the real-time noise data in frequency and amplitude, and therefore interference noise lowering can be formed. According to the automatic noise lowering method, device and system of the projector, a sound sensor, a fan control chip, the loudspeaker and an FPGA are combined to solve the noise problem of the system fan of the projector, and automatic monitoring and automatic regulation and control are achieved in the whole process; manual intervention is omitted, and the most ideal noise lowering effect of the system can be achieved fast.

Description

Technical field [0001] The invention relates to the technical field of projectors, and in particular to a method, device and system for automatically reducing noise of a projector. Background technique [0002] Most of the noise reduction systems of projectors nowadays are passive noise reduction. When the noise exceeds the standard, we will look for corresponding solutions. This method not only cannot guarantee that the final result will meet the standard, but the solution process is quite cumbersome and needs to be kept constant. Perform experimental testing and recording. When faced with the contradiction between high requirements for heat dissipation and low noise requirements, rectifiers are often helpless. The final result can only be completed, and cannot completely solve the noise problem. [0003] In addition, the prior art uses low-speed fans, sound-absorbing panels and other technologies to reduce noise in terms of hardware, and cannot fundamentally solve the noise pro...

AI Technical Summary

Problems solved by technology

[0002] Now the noise reduction system of most projectors is passive noise reduction. When the noise exceeds the standard, then go to find the corresponding solution. Experimental testing, recording

When faced with the contradiction between high heat dissipation requirements and low noise requirements, the rectification personnel are often helpless

The final result can only be a compromise, and it cannot fundamentally solve the noise problem

[0003] In addition, the existing technology uses technologies such as low-speed fans and sound-absorbing panels to reduce noise in terms of hardware, and it cannot fundamentally solve the noise problem of the projector.

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