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Noise separation type hybrid active anti-noise system

A noise separation and hybrid technology, applied in active noise control, sounding equipment, instruments, etc., can solve the problems of poor noise reduction and adaptive calculation divergence, and achieve the effect of avoiding calculation divergence.

Pending Publication Date: 2022-02-22
LEEDARSON IOT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the error signals input to the feedback anti-noise module and the feed-forward anti-noise module may diverge the adaptive operation at the front end of the finite impulse response filter (FIR filter) in the circuit, resulting in poor noise reduction effect. good

Method used

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  • Noise separation type hybrid active anti-noise system
  • Noise separation type hybrid active anti-noise system
  • Noise separation type hybrid active anti-noise system

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Embodiment Construction

[0024] The detailed description and technical content of this application are described as follows in conjunction with the accompanying drawings. Furthermore, for the convenience of explanation, the scales of the drawings in this application are not necessarily drawn according to the actual scale. The above-mentioned drawings and their proportions are not intended to limit the scope of this application, and are described here first.

[0025] In one embodiment, the present application may be implemented in a noise canceling device or a noise canceling controller in a personal listening system including a wired headset, smartphone handset, wireless headset, or other head-mounted audio device. No restrictions are imposed.

[0026] In this application, the devices, devices, modules and their corresponding functions can be executed by a single chip or a combination of multiple chips, and the number of these chip configurations is not limited in this application. In addition, the c...

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Abstract

The invention belongs to the technical field of noise processing, and provides a noise separation type hybrid active anti-noise system. The system comprises a reference receiving device, an error receiving device, an audio output device, a high-frequency noise shaper, a feed-forward noise reduction processor, a low-frequency noise shaper, a feedback noise reduction processor and a mixer. And the high-frequency noise shaper eliminates high-frequency noise of the error signal and outputs a high-frequency error integer signal. And the feed-forward noise reduction processor performs low-frequency noise reduction on the high-frequency error shaping signal and then outputs a low-frequency noise reduction signal. The low-frequency noise shaper eliminates low-frequency noise of the error signal and outputs a low-frequency error integer signal. And the feedback noise reduction processor performs high-frequency noise reduction on the low-frequency error integer signal and then outputs a high-frequency noise reduction signal. The mixer outputs a noise reduction signal to the audio output device. The problem that the noise reduction effect is reduced due to operational divergence of the adaptive filter can be avoided.

Description

[0001] This application claims the priority of the Taiwan patent of China with the title of "Noise Separation Hybrid Active Noise Reduction System" and the patent No. 109127714, the entire contents of which are incorporated in this application by reference. technical field [0002] The present application belongs to the technical field of noise processing, and provides a hybrid active noise rejection system, in particular to a noise separation hybrid active noise rejection system capable of improving the noise reduction effect. Background technique [0003] Active Noise Control (ANC) is a device that can isolate specified noise while leaving other sounds unaffected. The main principle is to receive the specified noise according to the sound source receiving device, and use the sound sending device to send out sound waves with completely opposite phases, so that the two sound waves can cancel each other out, thereby filtering out the noise. At present, the active noise reduct...

Claims

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/17854G10K11/17879G10K2210/3028
Inventor 林义雄陈浩铭
Owner LEEDARSON IOT TECH INC