CN218124904U

CN218124904U - Head-mounted active noise reduction earphone

Info

Publication number: CN218124904U
Application number: CN202222561432.2U
Authority: CN
Inventors: 刘瑞翔; 陆荣生; 梁浩谦; 单欣宇; 赵晨旭
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-12-23
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a wear active earphone of making an uproar that falls, including bandeau, earmuff, the module of making an uproar falls in initiatively, the earmuff connect in the both ends of bandeau, the earmuff sets up in the earmuff inboardly, the module of making an uproar falls in initiatively includes the speaker, falls the microphone, digital signal processing unit, the speaker set up in the earmuff is inboard, fall the microphone set up in the earmuff, the speaker with fall the microphone of making an uproar all with the digital signal processing unit electricity be connected. The active noise reduction earphone has the advantages that the active noise reduction earphone with low cost is provided aiming at the problems that the existing active noise reduction earphone is too high in cost, poor in noise reduction effect and mainly used for music correlation and is difficult to play a good role in a specific environment, so that the purposes of reducing cost and improving the noise reduction effect in a specific scene are achieved, and the active noise reduction earphone is convenient to carry and assemble.

Description

Head-mounted active noise reduction earphone

Technical Field

The utility model relates to a noise reduction earphone technical field especially relates to an active noise reduction earphone of head-mounted to specific frequency, specific operational environment.

Background

With the development of modern society, the living standard of people is continuously improved, and meanwhile, the noise problem is more and more prominent, so that the working efficiency and the life quality of people are greatly influenced, and the hearing health of people is damaged in serious cases. A worker in a work environment such as a high-speed rail station, an airport, etc. may have impaired hearing due to environmental noise. Moreover, the communication difficulty of workers during working can be caused, and the common earphone has no noise reduction effect. The existing noise reduction earphones in the market have the disadvantages of high cost, poor noise reduction effect, and high price, are mainly used for playing music, are usually unsatisfactory in noise reduction effect, and are difficult to play a good role in a specific environment. The earphone can not solve the problem that workers are in a high-noise environment for a long time. In order to solve the hearing safety problem of people working under specific noise, an active noise reduction earphone with low cost and good noise reduction effect for specific environment is very necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-cost active noise reduction earphone to the defect to prior art to reach reduce cost, improve the purpose of the noise reduction effect in the specific scene.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

the utility model provides an active earphone of making an uproar that falls of head-wearing, includes bandeau, ear muff, its characterized in that: still include the earlap, actively fall the module of making an uproar, the earlap connect in the both ends of bandeau, the earmuff sets up in the earlap inboardly, actively fall the module of making an uproar including the speaker, fall the microphone, the digital signal processing unit of making an uproar, the speaker set up in the earmuff is inboard, fall the microphone of making an uproar set up in the earmuff lower extreme, the digital signal processing unit set up in the earlap, the speaker all is connected with the digital signal processing unit electricity with the microphone of making an uproar.

Furthermore, the digital signal processing unit comprises a digital filter, the noise reduction microphone is connected with the input end of the digital filter, and the loudspeaker is connected with the output end of the digital filter.

Furthermore, the digital signal processing unit further comprises a digital equalizer, the audio input circuit is connected with the input end of the digital equalizer, and the loudspeaker is connected with the output end of the digital equalizer.

Further, the digital filter comprises a resistor, a capacitor and an inductor.

Further, the bandeau pass through the connecting piece with the earlap links to each other, be provided with the slide rail on the connecting piece, the earlap can stretch out and draw back along the slide rail.

Further, the whole headband is in a circular arc shape which is adapted to the head of a person.

Furthermore, a soft cushion is arranged at the position where the head band is contacted with the head of a person.

Further, the headband is made of a POK material.

Compared with the prior art, the beneficial effects of the utility model are that:

1. compared with the common active noise reduction earphone in the market, the earphone has the characteristics of low cost and high cost performance.

2. The noise reduction mode combining the front feedback noise reduction and the error correction enables the noise reduction effect of the earphone to be more excellent, and most of noise can be filtered.

3. The noise reduction device has the function of selective noise reduction, and can filter the noise of a specific frequency band in a specific occasion, so that the noise of the environment can be reduced under the condition of not interfering the normal communication of people.

4. Compared with the common earphone, the earphone not only can filter low-frequency noise, but also can filter high-frequency noise.

Drawings

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

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

fig. 3 shows the active noise reduction structure and the working schematic diagram of the present invention.

Wherein: 1-headband, 2-earmuff, 3-earmuff, 4-loudspeaker, 5-noise reduction microphone, 6-digital signal processing unit, 7-digital filter, 8-digital equalizer, 9-audio input circuit, 10-connecting piece, 11-slide rail and 12-soft cushion.

Detailed Description

In order to deepen the understanding of the present invention, we will make the present invention further detailed below with reference to the attached drawings, and this embodiment is only used to explain the present invention, and does not constitute a limitation to the protection scope of the present invention.

Fig. 1-2 show a specific embodiment of a head-mounted active noise reduction earphone, which includes a head band 1, earmuffs 2, a shell 3, and an active noise reduction module, wherein the shell 3 is connected to two ends of the head band 1, the earmuffs 2 are disposed inside the shell 3, the active noise reduction module includes a speaker 4, a noise reduction microphone 5, and a digital signal processing unit 6, the speaker 4 is disposed inside the earmuffs 2, the noise reduction microphone 5 is disposed at a lower end of the shell 3, the digital signal processing unit 6 is disposed inside the shell, and the speaker 4 and the noise reduction microphone 5 are electrically connected to the digital signal processing unit 6.

The headband 1 is connected with the earmuff 3 through a connecting piece 10, a sliding rail 11 is arranged on the connecting piece 10, and the earmuff 3 can stretch along the sliding rail 11. The entire headband 1 is in the shape of a circular arc adapted to the head of a person. A soft cushion 12 is arranged at the position where the headband 1 contacts with the head of a person. The headband 1 is made of a POK material.

Specifically, as shown in fig. 3, the digital signal processing unit 6 includes a digital filter 7 and a digital equalizer 8, the noise reduction microphone 5 is connected to an input terminal of the digital filter 7, the audio input circuit 9 is connected to an input terminal of the digital equalizer 8, and the speaker connection 4 is connected to output terminals of the digital filter 7 and the digital equalizer 8. The digital filter 7 includes elements such as a resistor, a capacitor, and an inductor.

The working principle of the above embodiment is as follows:

this embodiment mainly falls and falls the combined action of making an uproar and accomplish the function of making an uproar passively through the initiative, and passive noise reduction module is constituteed to bandeau 1, earmuff 2 wherein for the noise of isolated most low frequencies in the life. The loudspeaker 4, the noise reduction microphone 5 and the digital signal processing unit 6 jointly form an active noise reduction module, and the noise reduction microphone 4 is used for receiving external noise at the circuit where the noise reduction microphone is located and converting a sound signal into an electric signal to be transmitted to the digital filter 7 for processing. After the electric signal generated by the noise reduction microphone 5 is processed by a loop consisting of a resistor, a capacitor and an inductor, a waveform with a phase opposite to that of the noise electric signal can be obtained by measuring the instantaneous voltage at the inductor. According to the characteristic, the waveform of the voltage at the inductor is read by the chip, and the read waveform is corrected and processed, so that an electric signal waveform which is equal to the amplitude of the noise electric signal and is opposite to the phase is obtained. The processed waveform of the electric signal is transmitted to the speaker 4 through a wire, and the speaker 4 converts the electric signal into a sound signal and outputs the sound signal. The sound output by the loudspeaker 4 and the noise entering the human ear are subjected to 'anti-phase cancellation' action, so that the noise reduction effect is achieved.

The embodiment can reduce the production cost of the noise reduction earphone. The active noise reduction earphones on the market today are generally sold at a high price mainly because most of the active noise reduction earphones are complex in production process and high in production cost. And the utility model discloses a reduction in production cost can let the selling price of the earphone of making an uproar of falling voluntarily reduce, and more people can have better music enjoyment.

The utility model discloses the noise reduction effect of the earphone formula of making an uproar "one sword is cut in most initiatively having changed. Most active noise reduction earphones on the market eliminate or reduce external sound without exception, but the external sound is not noise, and some sounds such as communication between people need to be reserved. If all the external sounds are eliminated or attenuated without exception, inconvenience is caused to the user. And the utility model discloses a screening to the noise, this problem, the person of facilitating the use can be solved.

The foregoing detailed description of the embodiments is provided for the purpose of illustrating the technical concept and structural features of the present invention, and is not intended to limit the scope of the present invention, which is defined by the claims and the accompanying drawings.

Claims

1. The utility model provides a headphone of making an uproar falls in head mode, includes bandeau (1), ear muff (2), its characterized in that: still include earlap (3), the module of making an uproar of falling initiatively, earlap (3) connect in the both ends of bandeau (1), earlap (2) set up in earlap (3) inboardly, the module of making an uproar of falling initiatively includes speaker (4), falls microphone (5), digital signal processing unit (6), speaker (4) set up in earlap (2) inboardly, fall microphone (5) of making an uproar set up in earlap (3) lower extreme, digital signal processing unit (6) set up in earlap (3), speaker (4) and fall microphone (5) of making an uproar all are connected with digital signal processing unit (6) electricity.

2. A head-worn active noise reduction earphone according to claim 1, wherein: the digital signal processing unit (6) comprises a digital filter (7), the noise reduction microphone (5) is connected with the input end of the digital filter (7), and the loudspeaker (4) is connected with the output end of the digital filter (7).

3. A head-worn active noise reduction earphone according to claim 2, wherein: the digital signal processing unit (6) further comprises a digital equalizer (8), an audio input circuit (9) is connected with the input end of the digital equalizer (8), and the loudspeaker (4) is connected with the output end of the digital equalizer (8).

4. A head-worn active noise reducing earphone according to claim 3, wherein: the digital filter (7) comprises a resistor, a capacitor and an inductor.

5. A head-worn active noise reducing earphone according to claim 1, wherein: headband (1) through connecting piece (10) with earlap (3) link to each other, be provided with slide rail (11) on connecting piece (10), earlap (3) can stretch out and draw back along slide rail (11).

6. A head-worn active noise reducing earphone according to claim 1, wherein: the whole headband (1) is in a circular arc shape which is adaptive to the head of a person.

7. A head-worn active noise reducing earphone according to claim 1, wherein: the position of the headband (1) contacting with the head of a person is provided with a soft pad (12).

8. A head-worn active noise reducing earphone according to claim 1, wherein: the headband (1) is made of POK material.