Method for filtering sound noise

Abstract

The invention discloses a method for filtering sound noise, which comprises the following steps: firstly, using a plurality of sound receivers of a sound receiver array to detect a sound signal transmitted by a sound source; secondly, analyzing a sound signal detected by each sound receiver, and selecting the first sound receiver with good sound-receiving effect from the sound receiver array and the second sound receiver with poor sound-receiving effect; and finally using the second sound signal received by the second sound receiver to filter the noise in the first sound signal received by the first sound receiver, thereby acquiring a sound signal of which the noise is filtered. Therefore, the ambient noise in the sound signal can be effectively filtered, and the speech quality is improved.

Description

technical field [0001] The present invention relates to a noise filtering method, and in particular to a method for filtering microphone sound noise. Background technique [0002] With the rapid development of electronic technology, various electronic products are constantly being introduced. Among them, portable electronic devices such as mobile phones, personal digital assistants, and notebook computers have gradually become one of the indispensable tools in modern people's life due to their advantages of lightness, lightness, shortness, and portability. one. Among these portable electronic devices, the mobile phone has the characteristics of instant communication and is not limited by time and place, so it gradually replaces the traditional telephone and becomes the most convenient and fastest communication tool between people. On the other hand, personal digital assistants or notebook computers can also provide instant messaging functions through network transmission by...

AI Technical Summary

Problems solved by technology

However, just because the sound clarity of the receiver is improved, the quality of the receiver will also be easily affected by the noise in the environment. When the caller makes a call, the voice of his speech and the noise of the surrounding environment will be transmitted to the receiver. and transmitted to the ear of the recipient through the communication link of the portable electronic device

If it is in a general indoor environment, the environmental noise is small, and the impact on the call quality will not be great, but if there are noisy crowds or cars passing by, it will be difficult for the receiver to hear the speaker's voice clearly , especially when the portable electronic device is in hands-free speakerphone amplified mode

[0004] In order to solve the above problems, a current solution is to set a threshold of sound amplitude in the portable electronic device, and when the amplitude of a single frequency in the received sound signal is greater than the threshold, the sound signal of this frequency will be rejected. Transmission, if the noise is small and its amplitude does not exceed the threshold, the noise will be filtered out first to improve the call quality, but if the noise is quite large and exceeds the threshold, the noise will still be transmitted, and the result is still unable to fundamentally solve the noise interference The problem

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