Active noise reduction circuit and device

A noise reduction, circuit technology

Pending Publication Date: 2022-03-08
GEER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose an active noise reduction circuit and device, aiming to ...

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  • Active noise reduction circuit and device
  • Active noise reduction circuit and device
  • Active noise reduction circuit and device

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0055] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0056] In addition, the ...

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Abstract

The invention relates to the technical field of electronics, and discloses an active noise reduction circuit and device. In the invention, the active noise reduction circuit comprises a filtering module and a signal feedback module, an input signal is filtered through the filtering module to obtain a filtered signal, the filtered signal is transmitted to the signal feedback module, and then the filtered signal is amplified through the signal feedback module to obtain the amplified signal. And the amplified signal is transmitted to the filtering module for re-filtering, and the re-filtered signal is transmitted to the signal feedback module. According to the invention, the amplified signal is transmitted to the filtering module for re-filtering through the signal feedback module, the re-filtered signal which is opposite to the amplified signal can be obtained, and then the filtered signal and the re-filtered signal are superposed through the signal feedback module. A filtered signal and a re-filtered signal opposite to the filtered signal can be superposed, so that the signal noise can be effectively reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an active noise reduction circuit and device. Background technique [0002] With the gradual diversification of the functions of consumer electronics products, consumers have more and more demands for noise reduction products at the receiving end, that is, active noise reduction headphones. Electronic filter design for active noise-canceling headphones requires consideration of amplitude and phase control. The traditional shelving filter (shelving filter) has limited ability to control the amplitude of the noise-lifted frequency band, especially the phase, which causes more noise lift and degrades user experience. Therefore, how to effectively reduce noise is an urgent technical problem to be solved. [0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not mean that the above content is admitted as prio...

Claims

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Application Information

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IPC IPC(8): H04R1/10G10K11/16
CPCH04R1/1083G10K11/16
Inventor 华洋杜洋于锴王若蕙
Owner GEER TECH CO LTD
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