CN106028204B

CN106028204B - Intelligent noise reduction earphone

Info

Publication number: CN106028204B
Application number: CN201610579610.0A
Authority: CN
Inventors: 华峰君
Original assignee: Zheng Qizhuang
Current assignee: Foshan Shenglang Electronic Technology Co., Ltd.
Priority date: 2016-07-19
Filing date: 2016-07-19
Publication date: 2021-11-30
Anticipated expiration: 2036-07-19
Also published as: CN106028204A

Abstract

An intelligent noise reducing earphone comprising a main housing forming part of an earphone body, a front housing, an ear canal tube attached to the front housing, and an earplug attached to the ear canal tube; an internal space S is formed between the main shell and the front shell, an internal partition plate is arranged between the main shell and the front shell, and the internal space S is divided into an independent first space S1 and a second space S2; the wall of the main shell is provided with an adjusting hole; the outside corner of main casing body is equipped with noise measuring device and regulation hole controlling means, and noise measuring device is used for measuring the environmental noise value of locating, and regulation hole controlling means receives the noise value of noise measuring device measurement after, compares, regulation hole controlling means is according to the result control regulation hole open and shut structure last micro motor switch' S of comparing on-off time to adjust the size of regulation hole, reach the regulation and spread into the purpose of the size of the external environment noise in second space S2 makes the earphone can carry out intelligent regulation under the state of difference.

Description

Intelligent noise reduction earphone

Technical Field

The invention relates to the field of audio equipment, in particular to an intelligent noise reduction earphone suitable for the audio equipment.

Background

Audio devices, typically headsets, have become one of the necessary accessories for portable electronic devices, such as cell phones, PDAs, personal computers, etc. A general earphone structure includes: an earphone plug for receiving an electronic signal; and the loudspeaker is used for converting the audio signal output by the electronic equipment into sound to be output. Along with the popularization of mobile communication technology, a microphone function needs to be added to the headset correspondingly so that a user can realize a call function.

At present, noise reduction design of earphones is usually realized by feedback, which is usually a given design target, a certain optimization design method is applied to obtain optimized controller frequency characteristics, and digital feedback or analog feedback is adopted for realization.

Noise cancellation methods are designed to reduce unwanted ambient sounds by using audio devices (e.g., headphones). Ambient sound is referred to as the background sound pressure level that occurs at any given location. To design a noise cancellation system, an audio source (e.g., headphones) must emit sound waves having the same amplitude but opposite polarity as the ambient sound present at the wearer's ear. The ambient sound waves and the sound waves from the earphone combine to form new waves, where effectively, at the wearer's ear, the two waves cancel each other in a process known as phase cancellation. The resulting ambient sound wave may be at such a low amplitude that it will not be audible to the human ear.

In-ear headphones that are inserted into the ear canal of a user during use are becoming increasingly popular for use with portable media devices and mobile phones. One reason these earphones are popular is because they isolate external noise that adversely affects the sound emanating from the earphone, thus requiring ambient noise to be picked up by the microphone and causing the earphone to output an inverse waveform. However, noise isolation designs make it difficult to reduce external noise that the noise needs to be received.

To solve the technical problem of noise elimination. The present inventors have made extensive studies and have proposed a solution to this problem.

Disclosure of Invention

Starting from this point, an object of the present invention is to provide an intelligent noise reduction earphone.

An intelligent noise reducing earphone comprising a main housing that is a main part of the earphone, a front housing, an ear canal tube attached to the front housing, and an earplug attached to the ear canal tube; a hollow bowl-shaped structure with an inner space S is formed between the main shell body and the front shell body, an inner partition plate is arranged in the inner space S, and the inner space S is divided into an independent first space S1 and a second space S2 by the inner partition plate; the method is characterized in that: in the first space S1, a conversion unit that converts an audio input signal into a sound wave signal is provided; a microphone for receiving external environment noise is disposed in the second space S2;

on the wall of the main housing corresponding to the second space S2, there is an adjustment hole, which allows external environmental noise to be conducted to the microphone but not to the ear canal of the user; the noise measuring device and the adjusting hole control device are arranged at the outer corner of the main shell, the noise measuring device is used for measuring the ambient noise value, the adjusting hole control device compares the noise value measured by the noise measuring device with a preset value after receiving the noise value, and the adjusting hole control device controls the on-time of the micro motor switch on the adjusting hole opening and closing structure according to the comparison result, so that the size of the adjusting hole is adjusted, and the purpose of adjusting the size of the external ambient noise transmitted into the second space S2 is achieved.

Further, in the first space S1, a plurality of pressure adjusting holes communicated with the outside are formed on the wall of the main housing, so that the back pressure generated by the conversion unit can be rapidly released.

Further, the ear canal tube has an annular protrusion at its outer periphery to prevent the earplug nested in the ear canal tube from slipping out when the earplug is fitted in the ear canal tube.

Furthermore, the sound receiving central axis of the microphone and the sound playing central axis of the conversion unit are in a mutually vertical state.

Further, the noise measuring device and the adjusting hole control device are connected together.

Further, the noise measuring means and the adjusting hole controlling means are powered by a battery provided in the first space S1.

Furthermore, the opening and closing structure on the adjusting hole is a sliding type gate.

The invention has the beneficial effects that:

1. the adjustment aperture 9 is adapted to allow variable noise adjustment so that ambient noise received by the microphone can be adjusted in different states, and the adjustment aperture can be closed if necessary to reduce ambient noise input.

2. The internal partition wall 11 completely separates the microphone 6 from the conversion unit 5 so that the microphone 6 is not affected by the conversion unit 5 and thus the microphone is not affected by the sound signal output from the conversion unit.

3. The pressure regulating hole 21 is used for releasing the back pressure generated by the conversion unit 5 rapidly, so that the influence of the back pressure is relieved, and the playing effect of the earphone on low-frequency sound is enhanced.

4. The noise measuring device 24 and the adjusting hole control device 23 can intelligently adjust the size of the adjusting hole 9 according to the external environment condition without manual operation.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

Detailed Description

The present invention is further illustrated by the following examples, which are not intended to limit the invention to these embodiments. It will be appreciated by those skilled in the art that the present invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.

Example 1

As shown in fig. 1, in the earphone 10, a main housing 2 as a main body part of the earphone 10, a front housing 3, an ear canal 31 attached to the front housing, and an earplug 4 are included.

The ear canal 31 is a tubular extending part, and the earplug 4 is attached to the ear canal 31, and particularly, an annular convex portion 32 is provided at an outer peripheral portion of the ear canal 31 to prevent the earplug nested in the ear canal 31 from easily slipping out when the earplug 4 is fitted to the ear canal 31.

The earplug 4 has a cylindrical member 41 fitted in the ear canal 31, and a spacer member 42 folded back from the front end of the cylindrical member 41. Particularly, the isolation member 42 is formed in a soft semi-spherical shape, and can be in close contact with the external auditory canal after the earplug 4 is inserted into the external auditory canal of the human ear, so as to prevent the leakage of sound and enhance the playing effect of the earphone on low-frequency sound. Optionally, the material of the earplug is a flexible and compressible material, including but not limited to high density foam, silicone, rubber, etc. And the material preferably has a high coefficient of friction, to prevent slipping.

A hollow bowl-shaped structure having an internal space S is formed between the main casing 2 and the front casing 3, a noise measuring device 24 and an adjusting hole control device 23 are provided at the outer corners of the main casing 2, and the internal space S is connected to an external electronic device through a lead (not shown) provided in the lead portion 7. Between the front housing 3 and the ear canal 31, a noise filter 33 is provided. The noise filter core 33 is made of a polymer material with micro-holes, and a typical material is ultra high molecular weight Polyethylene (UHMW-PE), or High Density Polyethylene (HDPE), or Polytetrafluoroethylene (PTFE), or Polypropylene (PP), or the like.

Wherein an inner partition 11 is defined in the inner space S, the inner partition 11 dividing the inner space S into two separate partial spaces S1 and S2, and a battery 22 for supplying power to the noise measuring device 24 and the regulation hole control device 23 which are disposed outside is further provided in the first space S1.

Wherein, the noise measuring device 24 is composed of a condenser microphone, a preamplifier, an attenuator, an amplifier, a frequency meter network, etc.: converting sound into an electric signal by a microphone, converting impedance by a preamplifier to match the microphone with an attenuator, adding an output signal to a network by the amplifier, performing frequency weighting on the signal, amplifying the signal to a certain amplitude by the attenuator and the amplifier, and sending the signal to an effective value detector or an adjusting hole control device 23; after receiving the noise value measured by the noise measuring device 24, the adjusting hole control device 23 compares the noise value with a preset value, and the adjusting hole control device 23 controls the on-time of the micro motor switch on the opening and closing structure of the adjusting hole 9 according to the comparison result, so that the size of the adjusting hole 9 is adjusted, and the purpose of adjusting the size of the external environment noise transmitted into the second space S2 is achieved.

In the present embodiment, the second space S2 is located above the first space S1. In the first space S1, a conversion unit 5 is provided that converts an audio signal of the electronic device into a sound wave signal, and the conversion unit may typically include a speaker, a loudspeaker.

In first space S1, on the wall of main casing body 2, set up a plurality of pressure regulating holes 21 with outside UNICOM, when converting unit 5 worked, because the effect in pressure regulating hole 21 for the backpressure that produces at converting unit 5 can be quick release, thereby alleviate the influence of backpressure, and strengthened the broadcast effect of earphone to low frequency sound.

Further, in the second space S2, a microphone 6 is provided. Preferably, the sound receiving center axis of the microphone 6 and the sound emitting center axis of the converting unit 5 are perpendicular to each other, and the microphone 6 is not affected by the converting unit 5 because the internal partition wall 11 completely separates the microphone 6 from the converting unit 5, so that the microphone is not affected by the sound signal output from the converting unit.

On the wall of the main casing 2 corresponding to the second space S2, an adjusting hole 9 is further opened, and the adjusting hole 9 allows external noise to be conducted to the microphone 6 but not to the ear canal of the user, so that the microphone 6 can effectively receive the external noise and perform feedback to achieve the effect of eliminating the environmental noise with high precision. This is because the space in which the internal partition wall 11 is joined to the front case 3 is isolated from the ear canal 31.

Particularly, the opening and closing structure capable of adjusting opening and closing is arranged on the adjusting hole 9, so that the size of the adjusting hole 9 can be freely adjusted, and the opening and closing structure design of the sliding type gate 91 can well meet the requirements. The signal processing device 23 controls the slide gate 91 to slide to a corresponding position according to the magnitude of the external noise, thereby achieving the purpose of adjusting the size of the adjusting hole 9.

Example 2

As shown in fig. 2, unlike in embodiment 1, the first space S1 is provided in parallel with the second space S2.

Alternatively, the door of the adjusting hole 9 can be realized by using a power-operated door opening and closing mode. The electric switch can be driven by a miniature piezoelectric element. Specifically, a fixed baffle plate is arranged outside the adjusting hole 9, and a plurality of micropores are formed in the fixed baffle plate; a movable baffle plate 96 is arranged in the adjusting hole close to the fixed baffle plate, a plurality of micropores are correspondingly arranged on the movable baffle plate 96, the movable baffle plate can linearly or rotationally move along a certain set direction (such as leftward or clockwise) on the surface of the fixed baffle plate, so that the micropores of the two baffle plates are staggered, and the micropores of the fixed baffle plate are blocked by the non-micropore part of the movable baffle plate. The piezoelectric element 95 is coupled to the flapper 96 and directly drives the movement of the flapper 96. The weak dc power required for the piezoelectric element 95 is provided by the music player power supply. One end of the power line is connected with the piezoelectric element, and the other end of the power line is connected with the earphone plug.

The above specific embodiments are merely illustrative of the present disclosure and do not represent a limitation of the present disclosure. The skilled person can think that there are many variations to the concrete structure of the invention, but the main technical features of the technical solution that is the same or similar to the invention should be covered by the protection scope of the invention.

Claims

1. An intelligent noise reducing earphone comprising a main housing formed as part of an earphone body, a front housing, an ear canal tube attached to the front housing, and an earplug attached to the ear canal tube; a hollow bowl-shaped structure with an inner space S is formed between the main shell body and the front shell body, an inner partition plate is arranged in the inner space S, and the inner space S is divided into an independent first space S1 and a second space S2 by the inner partition plate; the method is characterized in that:

in the first space S1, a conversion unit that converts an audio input signal into a sound wave signal is provided;

a microphone for receiving external environment noise is disposed in the second space S2;

on the wall of the main housing corresponding to the second space S2, there is an adjustment hole, which allows external environmental noise to be conducted to the microphone but not to the ear canal of the user; receiving external noise through a microphone and feeding back the external noise, so as to eliminate environmental noise;

the noise measuring device and the adjusting hole control device are arranged at the outer corner of the main shell, the noise measuring device is used for measuring the ambient noise value, the adjusting hole control device compares the noise value measured by the noise measuring device with a preset value after receiving the noise value, and the adjusting hole control device controls the on-time of the micro motor switch on the adjusting hole opening and closing structure according to the comparison result, so that the size of the adjusting hole is adjusted, and the purpose of adjusting the size of the external ambient noise transmitted into the second space S2 is achieved.

2. An intelligent noise reducing earphone as claimed in claim 1, wherein: in the first space S1, a plurality of pressure adjusting holes communicated with the outside are formed on the wall of the main housing, so that the back pressure generated by the conversion unit can be rapidly released.

3. An intelligent noise reducing earphone as claimed in claim 1, wherein: the ear canal tube has a circumferential portion with an annular raised portion that prevents the earplug nested in the ear canal tube from slipping out when the earplug is mated with the ear canal tube.

4. An intelligent noise reducing earphone as claimed in claim 1, wherein: the sound receiving central axis of the microphone and the sound playing central axis of the conversion unit are mutually vertical.

5. An intelligent noise reducing earphone as claimed in claim 1, wherein: the noise measuring device is connected with the adjusting hole control device.

6. An intelligent noise reducing earphone as claimed in claim 1, wherein: the noise measuring means and the regulation hole control means are powered by a battery provided in the first space S1.

7. An intelligent noise reducing earphone as claimed in claim 1, wherein: the opening and closing structure of the adjusting hole is a sliding type gate.