Active noise reduction device with automatic identification and tracking based on auricle feature position

Abstract

The invention discloses an active noise reduction device with automatic identification and tracking based on auricle feature position. The device comprises an identification system arranged in a sleep area, a microphone system, an electromechanical system, a sound source system and a control system, and the identification system is used for collecting the auricle feature position; the microphone system is used for collecting sound field parameters; the control system is used for processing the auricle feature position and the sound field parameters to obtain an external ear coordinate and anti-phase sound wave information, and sending the external ear coordinate and the anti-phase sound wave information to the electromechanical system and the sound source system; and the electromechanical system controls the sound source system to track the ear position and output the anti-phase sound wave to offset the noise at the ear position. According to the invention, characteristic parameters of human ear position (auricles) are automatically tracked and identified in a full-angle manner, human ear 3D positioning is tracked, anti-phase sound waves are emitted, noise reaching ear edges is counteracted, and non-contact active noise reduction is realized.

Description

technical field [0001] The invention relates to the field of noise control, in particular to an active noise reduction device based on automatic identification and tracking of auricle feature positions. Background technique [0002] The existing active noise cancellation (Active Noise Cancellation, ANC) technology is to superimpose sound sources with opposite phases on the low-frequency noise of the environment so as to achieve the effect of noise reduction. Currently on the market such as Bose, Sony, etc. have launched active noise reduction headphones / earmuffs, but their use has certain limitations. Wearing earphones and earmuffs for a long time when working in a noisy environment, because the contact surface of the earphones / earmuffs is bonded to the skin, there is pressure, which will affect the normal heat exchange of the human auricle and the skin of the external auditory canal. Wearing it for a long time will cause discomfort or even Induce otitis externa, etc. Con...

AI Technical Summary

Problems solved by technology

Wearing earphones and earmuffs for a long time when working in a noisy environment, because the contact surface of the earphones / earmuffs is bonded to the skin, there is pressure, which will affect the normal heat exchange of the human auricle and the skin of the external auditory canal. Wearing it for a long time will cause discomfort or even induced otitis externa

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