Active noise reduction earphone, noise reduction method and storage medium based on active noise control algorithm

Abstract

The invention discloses an active noise reduction headphone based on an active noise control algorithm, a noise reduction method and a storage medium. The method comprises the following steps: acquiring headphone outside noise by a reference microphone, and transmitting the acquired outside noise to all active noise control systems; processing the outside noise acquired by the reference microphoneby the active noise control systems by virtue of a variable order algorithm of combining a variable iteration parameter and a qualified function, and outputting cancellation noise to a silencing speaker; and outputting the received cancellation noise by the silencing speaker and canceling the actual noise. According to the novel active noise reduction headphone based on the active noise control algorithm provided by the invention, with the adoption of a robust design, the noise signal is subjected to cyclic iterative processing by the system, the most suitable noise reduction system parameters can be selected, and the change of a noise signal is rapidly and accurately tracked, so that the noise reduction effect is greatly improved.

Description

technical field [0001] The invention relates to the technical field of mobile terminals, in particular to an active noise reduction earphone based on an active noise control algorithm, a noise reduction method and a storage medium. Background technique [0002] Acoustic noise exists in daily life, work and other environments, and noise pollution has become an environmental problem of great concern all over the world. [0003] In order to better eliminate noise, people gradually began to use "active noise reduction" technology. Its principle is that all sounds are composed of a certain spectrum. If you can find a sound whose spectrum is exactly the same as the noise to be eliminated, but the phase is just opposite (180° difference), you can completely cancel the noise. . The key is how to get a sound that cancels out the noise. The practical method is to start from the noise source itself and try to invert the phase of the original noise through the electronic circuit. At...

AI Technical Summary

Problems solved by technology

The main disadvantages of the traditional adaptive algorithm are slow convergence speed and poor steady-state performance, which seriously affect the performance of the algorithm and affect the noise reduction effect

Most of the existing active noise reduction headphones use the most basic adaptive filtering algorithm, which is not suitable for the processing of some nonlinear and non-stationary temporal noise sequences. Due to the large changes in noise in daily life, the real-time performance of the system is required to be strong. However, the structure of the conventional noise reduction system is relatively simple, and it does not have enough ability to deal with some scenes of sudden noise changes, and it is easy to generate additional noise, which will affect the noise reduction. Noise effect has a great impact, while affecting the wearer's comfort

Images