The Principle And Application Of Digital Anti-noise Processing Technology

At present, the third-generation anti-noise products in China utilize dynamic noise reduction (DNR) technology. DNR technology achieves the purpose of noise reduction by dynamically adjusting the output voice switch through changing voice peaks. Although it is currently one of the better anti-noise simulation processing technologies, it has some limitations, including the dropping of light consonants and the trailing of strong sound noise. The noise reduction effect is more focused on low frequencies. Noise reduction is entirely achieved through hardware circuits, but it is rather troublesome to debug and maintain. Due to these problems, the extensive promotion and application of analog DNR noise reduction products have been restricted. With the rapid development of digital signal processing technology, products of digital anti-noise technology supported by digital signal processors and related algorithms are constantly emerging. It has replaced the DNR analog noise reduction technology product. Digital anti-noise technology applies modern digital signal processing (DSP) technology and its characteristics of high-speed real-time processing and operation, and uses corresponding software algorithms to process voice and noise in high-noise environments, thereby completing the voice communication function in high-noise environments.