Noise reduction earphone and method for reducing noises and distortion of same

Abstract

The invention provides a pair of noise reduction earphones and a method for reducing the noises and the distortion of the same. In the invention, a first audio-frequency playing device is used for playing source signals, and a second audio-frequency playing device is used for playing antinoise signals with which are generated by a noise eliminating system and have equal amplitudes and reverse phases with environmental noises so that the source signals, the environmental noises and the antinoise signals are mixed and added to form an acoustic adder in the earphones or the auditory meatus of human bodies so as to counteract the environmental noises, therefore the human bodies only hear the input source signals; and the noise eliminating system and the input source signals are completely independent, therefore the distortion degree and noises of the source signals can not be increased.

Description

【Technical field】 [0001] The invention relates to earphones, in particular to a noise reduction earphone and a method for reducing noise and distortion of the earphone. 【Background technique】 [0002] Along with the application of portable music players, earphones are also widely popularized. Portable music players are often used on streets or in vehicles such as buses where the noise level is high, and external noise can also be heard through headphones along with the music reproduced by the player. If you listen to music in the noise, sometimes the music is drowned by the noise, so the user needs to increase the volume to listen to the music. Excessive increase in the volume will cause hearing loss, and the sound will leak from the earphones to the outside, sometimes making people around you feel uncomfortable. Also, even if high-quality musical sound is reproduced using headphones, noise entering from the outside may disturb the quality of the reproduced sound that the u...

AI Technical Summary

Problems solved by technology

exist figure 2 In the above, the source signal must pass through the adder, and then output to the speaker, the impedance of the adder will reduce the control ability of the signal source to the speaker, that is, reduce the damping coefficient of the signal source, which will reduce the sound quality, and the anti-phase noise signal will also be applied To the adder, through the adder, it enters the signal source and interferes with the signal source, which will also reduce the sound quality

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