An adaptive ear canal active noise reduction earphone and an adaptive ear canal active noise reduction method

Abstract

The invention discloses an adaptive ear canal active noise reduction earphone and an adaptive ear canal active noise reduction method. The earphone comprises a loudspeaker, an audio input module, a microphone, an operation module and a noise reduction processing module, the audio input module, the operation module, the microphone and the loudspeaker are all connected with the noise reduction processing module, and the microphone is arranged in a front cavity of the loudspeaker. The noise reduction method comprises the following steps that 1, an artificial ear acquires calibrated audios to obtain a third frequency response curve and a third phase curve; 2, the microphone acquires the calibrated audios and surrounding sounds simultaneously to obtain a first frequency response curve, a firstphase curve and a second phase curve; 3, the operation module conducts operation according to data obtained in the step 1 and the step 2 and a fixed algorithm to obtain a filter coefficient; and 4, the noise reduction processing module conducts noise reduction processing on the audios by using the filter coefficient. The earphone and the noise reduction method can adapt to the noise reduction requirements of various different ear canals, meet the noise reduction requirement of users and provide a good experience feeling for the users.

Description

technical field [0001] The invention relates to the technical field of noise reduction, in particular to an adaptive ear canal active noise reduction earphone and an adaptive ear canal active noise reduction method. Background technique [0002] Earphones have been widely used in people's daily life and work. In addition to the functions of enjoying music and entertainment, earphones are also widely used to isolate noise and maintain a relatively quiet environment. Noise effects and capabilities are limited. [0003] The method adopted by the active noise reduction technology is to generate a signal with the same amplitude and opposite phase as the external noise to cancel the noise entering the earphone. However, the current active noise reduction technology used in headphones only has a constant noise reduction curve. Since each person's ear canal space is unique, the noise reduction effect varies greatly from person to person, which means that it feels good to some peopl...

AI Technical Summary

Problems solved by technology

However, the current active noise reduction technology used in headphones only has a constant noise reduction curve. Since each person's ear canal space is unique, the noise reduction effect varies greatly from person to person, which means that it feels good to some people. Noise-canceling headphones that have poor or no noise-canceling effects on others

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