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Noise reduction earphone and method for controlling on/off of noise reduction circuit

A noise-cancelling and noise-cancelling earphone technology, applied in earphones to reduce ambient noise, earpiece/earphone accessories, etc., can solve the problems of high power consumption of earphone amplifier circuits and difficulty in external noise, and achieve power reduction, high-precision playback effect, guarantee The effect of the playback effect

Pending Publication Date: 2016-11-09
华峰君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the noise isolation design makes it difficult to cancel the external noise that needs to be received, and when the ambient noise level is small, this way of working will cause the headphone amplifier circuit in the noise cancellation circuit to consume a lot of power all the time

Method used

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  • Noise reduction earphone and method for controlling on/off of noise reduction circuit
  • Noise reduction earphone and method for controlling on/off of noise reduction circuit
  • Noise reduction earphone and method for controlling on/off of noise reduction circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown in , in the earphone 10 , a main housing 2 as a main part of the earphone 10 , a front housing 3 , an ear canal tube 31 attached to the front housing, and an earplug 4 are included.

[0025] The ear canal tube 31 is a tubular extension, and the earplug 4 is attached to the ear canal tube 31. In particular, there is an annular protrusion 32 on the outer periphery of the ear canal tube 31. When the earplug 4 is fitted with the ear canal tube 31 , to prevent the earplug nested on the ear canal tube 31 from slipping out easily.

[0026] The earplug 4 has a cylindrical member 41 nested on the ear canal tube 31 , and a spacer member 42 folded back from the front end of the cylindrical member 41 . In particular, the insulating part 42 is formed into a soft hemispherical shape, and after the earplug 4 is inserted into the external auditory canal of the human ear, it can closely contact with the external auditory canal to prevent sound leakage and enha...

Embodiment 2

[0035] Such as figure 2 As shown, different from that in Embodiment 1, the first space S1 and the second space S2 are arranged in parallel.

[0036]Alternatively, the door of the adjustment hole 9 can also be realized by means of an electric switch door. The electric switch can be actuated by a tiny piezoelectric element. Specifically, outside the adjustment hole 9 is a fixed baffle, which has many micro-holes; in the adjustment hole, a movable baffle 96 is arranged close to the fixed baffle, and the movable baffle 96 is correspondingly arranged. There are many micro-holes, and the movable baffle can be moved linearly or rotated along a certain direction (such as left or clockwise) on the surface of the fixed baffle, so that the micro-holes of the two baffles are dislocated, and the The non-microporous part blocks the micropores of the fixed baffle. The piezoelectric element 95 is connected with the movable baffle 96 and can directly drive the movable baffle 96 to move. T...

Embodiment 3

[0038] In the present invention, the microphone 6 provided on the earphone is used to pick up the ambient noise at the position of the earphone being used. The present invention also provides a method of turning off the noise canceling circuit to save power when the door of the adjustment hole is fully closed.

[0039] In a typical noise cancellation circuit, the audio input signal can be any type of sound input source signal from an electronic device. Traditional audio input signals need to be fed to an audio equalizer circuit before being fed to headphones. The audio equalizer circuit includes a noise canceling circuit in which ambient noise input from a microphone is fed to a special band stop filter that attenuates frequencies within a narrow stop band. The output of the bandstop filter is then mixed with the audio input signal to feed the amplifier. This keeps the noise canceling circuit consuming power regardless of whether the microphone is picking up noise.

[0040]...

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Abstract

The invention discloses a noise reduction earphone and a method for controlling the on / off of a noise reduction circuit. The earphone comprises a main case, a front case and the noise reduction circuit, wherein the main case, the front case and the noise reduction circuit form a main part of the earphone. The interior of an internal space S is provided with an internal partitioning wall, and the internal partitioning wall enables the internal space S to be divided into a first space S1 and a second space S2, which are independent of each other. The earphone is characterized in that the interior of the first space S1 is provided with a conversion unit which enables an audio input signal to be converted into a sound signal; the interior of the second space S2 is provided with a microphone for receiving external environment noise; a wall, corresponding to the second space S2, of the main case is provided with an adjustment hole; the adjustment hole is provided with a door which can achieve the closing of the adjustment hole; the noise reduction circuit is in a short-circuit state when the door of the adjustment hole is completely closed, thereby enabling an audio input signal not to pass through the noise reduction circuit, but to be directly fed back to the earphone.

Description

technical field [0001] The present invention relates to the field of audio equipment, in particular to a method for turning on or off the noise canceling circuit of the noise-cancelling earphone, which is applicable to the noise-cancelling earphone of the audio equipment. Background technique [0002] Audio equipment, typically earphones, has become one of the necessary accessories for portable electronic equipment, such as mobile phones, PDAs, and personal computers. Generally, the structure of the earphone includes: an earphone plug, which is used to receive electronic signals; and a speaker, which is used to convert the audio signal output by the electronic device into sound output. With the popularization of mobile communication technology, a corresponding microphone function needs to be added on the earphone, so that the user can realize the call function. [0003] At present, the noise reduction design of earphones is usually realized through feedback. Usually, the de...

Claims

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Application Information

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IPC IPC(8): H04R1/10
CPCH04R1/1083
Inventor 华峰君
Owner 华峰君
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