Non-enclosed earphone and its receiver-end speech enhancement device

Abstract

The present invention provides a nonenveloped earplug type earphone, a device and method for enhancing sound at its earpiece, wherein a nonenveloped coupling mode is adopted between the in-ear part of the earphone and an ear. The device includes: a microphone for receiving environmental noise; a noise filter for processing the received environmental noise so as to obtain a reverse noise with a phase which is reverse to the phase of the received environmental noise; a phase compensator for carrying out phase compensation on the reverse noise outputted from the noise filter; an adder for adding the reverse noise outputted from the phase compensator with the sound signals received by the earphone; and a loudspeaker unit for processing the signals outputted from the adder so that the reverse noise contained in the output signals of the loudspeaker, when arriving at the ear, is equal in terms of amplitude and reverse in terms of phase to the environmental noise arriving at the ear through space.

Description

technical field [0001] The present invention relates to speech enhancement technology, and more specifically, to a speech enhancement device that applies active noise control technology to the receiving end of a non-enclosed earplug earphone, and a non-enclosed earplug earphone. Background technique [0002] The improvement of the degree of social informatization enables people to communicate and communicate anytime and anywhere. With the application of earplug-type communication earphones such as monophonic bluetooth earphones and stereo communication earphones, users can continue their work while communicating. However, a large number of applications of electronic equipment bring more and more noise. Communication in a noisy environment seriously affects the clarity and intelligibility of communication voices. When the noise is high to a certain level, not only communication cannot be carried out at all, but also people's hearing and physical and mental health will be da...

AI Technical Summary

Problems solved by technology

That is to say, in non-enclosed earphones, if the above-mentioned feed-forward active noise control technology is adopted, the circuit H is very difficult to realize or is fundamentally physically impossible to realize

In addition, for non-enclosed earphones, the degree of coupling between the earphone and the human ear, and the size of the auricle will affect P and G, so that the amount of noise reduction may vary greatly when worn by different people. This leads to poor noise reduction stability

Therefore, it is difficult to directly apply the traditional feed-forward active noise control technology to the receiver of non-enclosed earphones to improve the signal-to-noise ratio of the voice at the receiver

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