Method and device for counteracting environment noise and active noise reduction earphone

An environmental noise and active noise reduction technology, applied in the direction of earphones to reduce environmental noise, earpiece/headphone accessories, microphones, etc., can solve the problem that the noise reduction scheme cannot achieve good noise reduction effect, and achieve the effect of good noise reduction experience.

Pending Publication Date: 2017-05-31
GEER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a method and device for offsetting environmental noise and an active noise reduction earphone to sol

Method used

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  • Method and device for counteracting environment noise and active noise reduction earphone
  • Method and device for counteracting environment noise and active noise reduction earphone
  • Method and device for counteracting environment noise and active noise reduction earphone

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Embodiment 1

[0023] figure 1 is a functional block diagram of a device for canceling environmental noise provided by an embodiment of the present invention, such as figure 1 As shown, the device for canceling environmental noise provided in this embodiment includes a microphone 110, a DSP chip 120, an active noise reduction controller 130, and a speaker 140. Several preset noise reduction modes and corresponding noise reduction parameters are stored in the DSP chip .

[0024] The microphone 110 collects the environmental noise at the human ear in real time. In this embodiment, only one microphone is used as a feed-forward noise reduction microphone and an environmental noise monitoring microphone. The DSP chip 120 periodically selects the noise reduction mode that best matches the current environment from several stored preset noise reduction modes according to the ambient noise collected by the microphone 110 within a preset time period, and maps the selected noise reduction mode to the ...

Embodiment 2

[0030] Figure 4 It is a functional block diagram of an active noise reduction earphone provided by an embodiment of the present invention, such as Figure 4As shown, the active noise reduction earphone 400 provided in this embodiment includes the device 410 for canceling environmental noise in the first embodiment above, and the microphone in the device 410 for canceling environmental noise is arranged between the human ear and the speaker of the earphone. The microphone is used as a feed-forward noise reduction microphone and an environmental noise monitoring microphone to collect the environmental noise at the human ear in real time, and the DSP chip in the device 410 for canceling the environmental noise periodically selects from several stored noise reduction modes according to the environmental noise collected by the microphone. Select the noise reduction mode that best matches the current environment, and send the corresponding noise reduction parameters and bass enhanc...

Embodiment 3

[0032] Figure 5 is a flowchart of a method for canceling environmental noise provided by an embodiment of the present invention, such as Figure 5 As shown, the method for offsetting environmental noise provided by this embodiment includes:

[0033] Step S510: Set several noise reduction modes in advance according to different noise scenes, and set noise reduction parameters corresponding to each noise reduction mode, and store each noise reduction mode and its corresponding noise reduction parameters.

[0034] A preferred embodiment of the present invention pre-adjusts noise reduction parameters for each preset noise reduction mode to adjust the user to cancel the waveform of environmental noise, and adjust the bass enhancement parameters to adjust the low frequency amplitude response and phase response characteristics of the speaker to the waveform , until the collected ambient noise at the human ear is less than the preset value; record the noise spectrum characteristics ...

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Abstract

The invention discloses a method and device for counteracting environment noise and an active noise reduction earphone. The device comprises a microphone, a DSP chip, an active noise reduction controller, and a loudspeaker, wherein the microphone is used as a feed-forward noise reduction microphone and an environmental noise monitoring microphone so as to acquire the environmental noise in real time; the DSP chip periodically selects a noise reduction mode best-matched with the current environment according to the environmental noise acquired by the microphone, and sending a corresponding noise reduction parameter to the active noise reduction controller; the active noise reduction controller performs the feed-forward filter noise reduction according to the noise reduction parameter sent by the DSP chip, and outputs the waveform for counteracting the environmental noise; and the loudspeaker plays the corresponding sound signal according to the waveform to counteract the environmental noise at the ear, thereby achieving the optimal noise reduction effect under various different environments, and the switching of the noise reduction mode is self-adaptively performed aiming at different noise environments, thereby guaranteeing that the best noise reduction experience can be provided under various different environments.

Description

technical field [0001] The invention relates to the technical field of active noise reduction, in particular to a method and device for canceling environmental noise and an active noise reduction earphone. Background technique [0002] Working in a high-noise environment for a long time will seriously affect the physical and mental health of employees. Especially for scenes with communication needs, it is necessary to wear noise-cancelling headphones to improve the intelligibility of communication. If you want to enjoy music during a long journey Relaxation also requires noise-canceling headphones to avoid distractions from ambient noise. [0003] The existing active noise reduction earphones are mainly noise reduction solutions with fixed filters, which can only cancel noise in fixed frequency bands. In some specific environments, the noise reduction effect is ideal, but the noise reduction effect will be compromised after the noise environment changes. . There are also s...

Claims

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Application Information

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IPC IPC(8): H04R1/10G10K11/175
CPCH04R1/1083G10K11/175H04R2201/10
Inventor 华洋王若蕙于锴朱育革
Owner GEER TECH CO LTD
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