WO2019071475A1

WO2019071475A1 - Noise-reducing earphones testing method and testing system

Info

Publication number: WO2019071475A1
Application number: PCT/CN2017/105739
Authority: WO
Inventors: 王周丹; 夏相声
Original assignee: 深圳传音通讯有限公司
Priority date: 2017-10-11
Filing date: 2017-10-11
Publication date: 2019-04-18

Abstract

The present invention provides a noise-reducing earphones testing method and testing system; a closed chamber is arranged, and an artificial head is arranged at the center of said closed chamber, said artificial head wearing said noise-reducing earphones; a noise collector is arranged inside the artificial head; inside the closed chamber, noise sources are uniformly arranged at equal distances away from the noise-reducing earphones; said noise sources play noise, and the noise collector detects a noise signal before and after the noise-reducing earphones activate a noise reduction function, so as to obtain the amount of noise reduction of the noise-reducing earphones. The present invention utilizes simple, currently available devices, is simple to operate, and does not require additional testing costs; the test data are objective and accurate, and the invention can also guarantee the development cycle of a project.

Description

Noise reduction earphone test method and test system

Technical field

The invention relates to the technical field of earphone production testing, in particular to a noise reduction earphone testing method and a testing system.

Background technique

Noise is everywhere, causing people to be bothered at all times. If you want to listen to music quietly, you need some special equipment, such as noise canceling headphones. A noise canceling earphone is a type of earphone that uses some method to reduce noise. At present, there are two main types of noise canceling headphones, namely active noise canceling headphones and passive noise canceling headphones.

Passive noise reduction usually uses three kinds of noise reduction measures, such as noise reduction at the sound source, noise reduction during propagation, and noise reduction at the human ear, such as in-ear headphones and headphone products. Passive noise canceling headphones mainly form an enclosed space by surrounding the ear, or use soundproof materials such as silicone earplugs to block external noise. Since the process of collecting and computing is not involved, the passive noise canceling earphone structure is simple and reliable, and the manufacturing threshold and the technical content are relatively low. However, since the noise is not processed by the noise reduction circuit chip, generally only high frequency noise is blocked, and the noise reduction effect on the low frequency noise is not obvious.

In order to proactively eliminate noise, the technology of "active noise reduction" was invented. Its principle is: all the sounds heard are sound waves, and they all have a certain spectrum. If an acoustic wave can be found, its spectrum is equal to the amplitude of the noise to be cancelled, and the phase is just the opposite (180° difference), and the superposition of the two can completely cancel the noise. The key is how to get the sound that cancels the noise. The actual method is to start with the noise itself, monitor the noise with a microphone, and then try to generate a reverse sound wave through the electronic circuit and play it through the speaker.

The active noise reduction function is to generate a reverse sound wave equal to the external noise through the noise reduction system, neutralize the noise, and achieve the effect of noise reduction. The active noise canceling earphones have noise reduction circuits that are compatible with external noise. Most of them use a large head-mounted design, which can block the external noise by using earphone cotton and earphone casings, and perform the first round of sound insulation. In order to have sufficient space to install active noise reduction circuits and power supplies. With active noise control, the principle is:

1. Firstly, the signal microphone placed in the earphone detects the low frequency noise (100~1000Hz) in the environment that the ear can hear;

2. Pass the noise signal to the control circuit, and the control circuit performs real-time calculation;

3. Play sound waves with the opposite phase and the same amplitude as the noise through the Hi-Fi speaker to cancel the noise;

4. After the superposition, the noise disappears and disappears.

In a noisy environment, active noise canceling headphones are widely used to protect hearing and perform normal communication. Noise-reducing headphones are currently used mainly for business personnel and white-collar workers. Due to frequent business trips, especially to and from different cities every day. Business people, they must hate the noise in the cabin. If there is a noise-cancelling earphone, they must be able to stay away from these noises and relax by listening to music. Of course, there are subway people, the office workers who crowd the subway every day, I am already familiar with the noise in the subway, but if there is a noise-reducing earphone at this time, not only can it be far away from the noise, but also can be adjusted through headphones. Mood, happy to enjoy this process. Office workers also need a pair of noise-cancelling headphones. When thinking about planning, listening to the sound of central air-conditioning is very upset, and if there are colleagues around you who are whispering, it is even more annoying. A pair of noise canceling headphones, expand the idea in beautiful music. However, today's noise-reducing earphone market has a small overall sales volume, high price, and the noise reduction effect is not satisfactory. The root cause is the inaccuracy of the test and the inaccuracy of the test data during the development of the earphone.

In the process of developing and producing active noise canceling headphones, it is necessary to determine whether the headphones are qualified by testing the noise reduction of the headphones. The currently known test schemes are mainly through subjective experience tests or to professional noise reduction earphones to apply for testing. The professional earphone testing organization applies for testing the noise reduction of the noise canceling earphones, and there are problems such as high test cost and delay in development cycle; through the subjective feeling test, the earphones are worn on the human head, and a set of external noise sources are used outside a certain distance. Noise is generated, and the noise reduction switch of the earphone is switched, and the difference in picking noise before and after the noise reduction function is compared as the noise reduction amount of the noise canceling headphone. In the actual test process, due to different subjective feelings of different people, different people have different ear sizes and softness, and there are also large differences in the ability of sound absorption, reflection and transmission. When different users wear noise-reducing headphones, This difference will be directly reflected in the detected noise signal. Due to the human sensory difference, the test data is inaccurate, and the product cannot achieve the ultimate and ideal noise reduction effect.

Therefore, the present invention provides a noise reduction earphone testing method and test system, which is provided with a closed cavity, an artificial head is disposed in the center of the closed cavity, and the artificial head wears the noise canceling earphone; a noise collector is disposed therein; a noise source is uniformly disposed at an equal distance from the noise reduction earphone in the closed cavity; the noise source plays noise, and the noise collector detects the noise reduction earphone to turn on a noise reduction function Before and after the noise signal, the noise reduction amount of the noise canceling earphone is obtained. The invention utilizes simple existing equipment, does not need to increase test cost, and the test data is objective and accurate, and can also ensure the project development cycle.

Summary of the invention

In order to overcome the above technical drawbacks, an object of the present invention is to provide a noise reduction earphone testing method and test system.

The invention discloses a noise reduction earphone testing method, which comprises the following steps:

a closed cavity is disposed, an artificial head is disposed in the center of the closed cavity, the artificial head wears the noise canceling earphone; and a noise collector is disposed in the artificial head;

Forming a noise source uniformly at an equal distance from the noise canceling earphone in the closed cavity;

The noise source plays noise, and the noise collector detects a noise signal before and after the noise reduction headphone turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.

Preferably, the noise source is one or more;

When the noise source is multiple, the noise source plays noise, and the noise collector detects a noise signal before and after the noise reduction headphone turns on the noise reduction function, and the step of obtaining the noise reduction amount of the noise reduction earphone includes:

A plurality of the noise sources simultaneously play equal loudness noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.

Preferably, the closed cavity is a cube;

The noise sources are four, distributed at the four corners of the same face of the cube.

Preferably, the noise source plays noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function, and the step of obtaining the noise reduction amount of the noise canceling earphone comprises:

The noise source plays noise;

The noise canceling headphone opens a noise reduction function of the left ear, and the noise collector detects a noise signal before and after the noise reduction function of the noise canceling headphone to open the left ear, and obtains a left ear noise reduction amount of the noise canceling earphone;

The noise canceling headphone turns off the noise reduction function of the left ear, and opens the noise reduction function of the right ear, and the noise collector detects the noise signal before and after the noise reduction function of the noise canceling headphone to open the right ear, and obtains the noise canceling earphone. Right ear noise reduction;

The noise canceling headphone opens a noise reduction function of the binaural, and the noise collector detects a noise signal before and after the noise canceling function of the noise canceling headphone to open the binaural earphone, and obtains a total noise reduction amount of the noise canceling earphone.

The noise source simulates different noise environments and plays noise;

The noise collector detects that, in the different noise environment, the noise canceling headphone turns on a noise signal before and after the noise reduction function, and obtains a noise reduction amount of the noise canceling headphone in the different noise environment.

The invention also discloses a noise reduction earphone testing system, comprising a noise canceling earphone setting module, a noise collecting device setting module, a noise source setting module and a noise reduction amount detecting module;

The noise reduction earphone setting module is provided with a closed cavity, and an artificial head is disposed in the center of the closed cavity, and the artificial head wears the noise canceling earphone;

The noise collector setting module is configured to set a noise collector in the artificial head;

The noise source setting module is configured to uniformly set a noise source at an equal distance from the noise reduction earphone in the closed cavity;

The noise reduction amount detecting module, the noise source plays noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.

Preferably, the noise source is one or more;

The noise reduction amount detecting module, when the noise source is multiple, a plurality of the noise sources simultaneously play equal loudness noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function, The noise reduction amount of the noise canceling earphone is obtained.

Preferably, the closed cavity is a cube;

Preferably, the noise reduction amount detecting module includes a left ear detecting unit, a right ear detecting unit, and a total detecting unit;

The left ear detecting unit, the noise source plays noise; the noise canceling headphone opens a noise reduction function of the left ear, and the noise collector detects a noise signal before and after the noise canceling function of the noise canceling headphone is turned on, Obtaining a noise reduction amount of the left ear of the noise canceling earphone;

The right ear detecting unit, the noise canceling headphone turns off the noise reduction function of the left ear, opens the noise reduction function of the right ear, and the noise collector detects the noise signal before and after the noise reduction function of the noise canceling headphone to open the right ear Obtaining a noise reduction amount of the right ear of the noise canceling earphone;

The total detecting unit, the noise canceling earphone opens a noise reduction function of the binaural, and the noise collector detects a noise signal before and after the noise canceling function of the noise canceling earphone to open the binaural noise reduction function, and obtains a total of the noise canceling earphone Noise reduction.

Preferably, the noise reduction amount detecting module simulates different noise environments and plays noise, and the noise collector detects that, in the different noise environment, the noise canceling headphone opens and ends the noise reduction function. The noise signal obtains the amount of noise reduction of the noise canceling earphone in the different noise environment.

After adopting the above technical solution, compared with the prior art, the following beneficial effects are obtained:

1. The noise reduction earphone testing method and test system provided by the invention utilizes simple existing equipment without increasing test cost;

2. The noise reduction earphone testing method and test system provided by the invention have objective and accurate test data;

3. The noise reduction earphone testing method and test system provided by the invention can also ensure the project development cycle.

DRAWINGS

1 is a flow chart showing a test method in accordance with a preferred embodiment of the present invention;

2 is a flow chart showing the test steps of a test method in accordance with a preferred embodiment of the present invention;

3 is a flow chart showing the test steps of a test method in accordance with a preferred embodiment of the present invention;

4 is a schematic structural view of a test system in accordance with a preferred embodiment of the present invention;

Figure 5 is a block diagram showing the structure of a test system in accordance with a preferred embodiment of the present invention.

Reference numerals: 100-test system; 11-noise canceling headphone setting module; 12-noise collector setting module; 13-noise source setting module; 14-noise reduction amount detecting module.

Detailed ways

Advantages of the present invention are further explained below in conjunction with the accompanying drawings and specific embodiments.

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with aspects of the invention as detailed in the appended claims.

The terminology used in the present invention is for the purpose of describing particular embodiments, and is not intended to limit the disclosure. The singular forms "a", "the", "the" and "the"

In the description of the present invention, the specific meaning of the terms may be understood by one of ordinary skill in the art, unless otherwise specified and defined.

In the following description, the use of suffixes such as "module" and "unit" for indicating elements is merely an explanation for facilitating the present invention, and does not have a specific meaning per se. Therefore, "module" and "unit" can be used in combination.

Referring to FIG. 1, the noise reduction earphone testing method of the present invention comprises the following steps:

S100: providing a closed cavity, an artificial head is disposed in the center of the closed cavity, and the artificial head wears the noise canceling earphone;

S200: setting a noise collector in the artificial head;

S300: in the closed cavity, uniformly set a noise source at an equal distance from the noise canceling earphone;

S400: The noise source plays noise, and the noise collector detects a noise signal before and after the noise reduction headphone turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.

- S100: providing a closed cavity, an artificial head is disposed in the center of the closed cavity, and the artificial head wears the noise canceling earphone;

A silent room is arranged, an artificial head is arranged in the center of the silent room, and the noise canceling earphone is worn on the artificial head. The invention entails providing a closed cavity as a test chamber for the noise canceling earphone.

The test chamber is an artificial, ideal, and special acoustic environment that is a special environment that assists in acoustic measurements, acoustic studies, and environmental acoustics research. Many environmental acoustics such as noise source measurements, airflow noise studies, hearing measurements, ear protector measurements, calibration of measuring instruments, and studies of sound absorbing materials and sound insulation structures can be performed in such laboratories. . Acoustic laboratories typically include reverberation chambers, sound insulation chambers, and anechoic chambers. It has good sound insulation and vibration isolation performance, and is equipped with a control room for placing test instruments and control indicating devices.

The sound insulation of the test room is generally a double wall structure. Usually the outer wall is a brick wall plaster, which can improve the sound insulation value by more than 6 decibels. The inner wall is made of concrete structure, no window, the door is made of special soundproof door, and the surrounding is made of accurate seams and covered with woolen cloth. To ensure a tight and seamless; or to insert a rubber air cushion on the door frame to inflate the seal. Double doors are also available to ensure sound insulation.

The test room serves two main purposes: to create an environment where the relationship between sound power and sound pressure is known; to reduce or eliminate noise interference, including environmental noise, auxiliary equipment, machinery, automobiles, trucks, airplanes, rail transit, and others. Noise caused by equipment, etc.

Classification of test rooms:

Acoustic room

The anechoic chamber is required for high precision level sound power testing, such as ANSI S12.35 and ISO 3745. Such test chambers contain an outer envelope with high transmission loss (usually constructed of concrete or modular steel) with a matte internal wedge on the ceiling, floor and walls. Usually, in order to be able to walk on the wedge, a tension cable floor is also used.

Advantages and disadvantages of the muffler room:

Advantages: save the direction information of the sound source; save the time history of the sound; high-level measurement accuracy.

Disadvantages: Requires a large, relatively expensive, accurately verified room that requires a 20-foot cube for small sound sources (for testing 100 Hz), and if you want to measure a larger sound source, the test frequency needs to be reduced; a large number of microphone positions are required; Laboratory throughput is important, and multi-channel simultaneous acquisition needs to be considered.

Industry standard: ANSI S12.35, ISO 3745.

2. Semi-anechoic chamber

The muffler chamber is used for high precision level sound power measurements such as ANSI S12.35 and ISO 3745, as well as engineering grade acoustic power measurements such as ANSI S12.34 and ISO 3744. Many test codes require the use of a semi-anechoic chamber (eg for computers, ECMA74, ISO 7779 and ANSI S12.10). Such a test chamber contains a high transmission loss enclosure with a muffling wedge trim inside the ceiling and walls. The ground is purposely designed to be highly reflective with an absorption coefficient of 0.06 or less and is usually constructed of concrete.

Advantages and disadvantages of the semi-anechoic chamber:

Advantages: save most of the direction information of the sound source (especially the smaller sound source relative to the wavelength); save the time history of the sound; relatively high level of measurement accuracy; the semi-anechoic chamber costs less than the silencer.

Disadvantages: Large, relatively expensive, and accurately verified rooms are required. For small sound sources, a 20 x 20 x 10 foot cube (for testing 100 Hz) is required. If a larger sound source is to be measured, the test frequency needs to be reduced; Microphone position; if laboratory throughput is important, multi-channel simultaneous acquisition needs to be considered.

Industry standards: ANSI S12.35, ISO 3745, ANSI S12.34, ISO 3744, ANSI S12.10, ISO 779, ECMA74.

3. Common room

The common chamber is used for high precision sound power measurements such as ANSI S12.31 and ISO 3741, as well as sound absorption measurements such as ASTM C423 and ISO 354. This test chamber consists of a high transmission loss enclosure with a sound-reflecting interior trim. All measurements are made in the reverberant area of the sound source.

Advantages and disadvantages of the common chamber:

Advantages: Relatively high measurement accuracy; measurements can be done quickly using a microphone.

Disadvantages: Loss of direction information for the sound source; lost time history of the sound; requires a large, carefully validated test room, approximately 200 cubic meters.

Industry Standard:

ANSI S12.31/S12.32, ISO 3741/3742, ASTM C423/ISO 354

4. Free field room

The free field chamber is an approximation of the semi-anechoic chamber. Instead of arranging the muffler wedges on the walls and ceiling, a few inches of fiberglass or similar sound absorbing material is placed on the walls and ceiling of the test room. Small rooms and rooms for low frequency testing require thicker layers of material, and large rooms and rooms for high frequency testing sometimes contain only three inches of sound absorbing material.

The free field room is used for sound power testing at the engineering level and survey level. The free field chamber is also used for sound intensity testing. Its main function is to control ambient noise and improve the accuracy of the strength test by reducing the sound reflection.

For engineering grade sound power testing, a parallelepiped test surface is required. The main verification step is to complete the sound pressure test on the reference sound source. Note that the sound power difference is calculated based on the measurement grid. A maximum of 2dB difference is allowed. If the difference is too large, the sound absorbing material in the room cannot be improved. The solution is to use more microphones placed near the sound source.

Advantages and disadvantages of a free-field room:

Advantages: Acceptable measurement accuracy; requires a moderately sized, relatively inexpensive, proven test chamber.

Disadvantages: A large number of microphone positions require the use of a large number of microphones; if laboratory throughput is important, multi-channel simultaneous acquisition needs to be considered; in addition to the sound intensity, the accuracy is lower than that of the semi-anechoic chamber.

Industry Standard:

ANSI S12.34, ISO 3744, ANSI S12.10, ISO 7779, ECMA 74, ANSI S12.12, ANSI S12.36, ISO 3746.

5. Other environments

“Other Environments” are all categories that fall, including appropriate conditions, outside the test room, testing non-dedicated areas (such as meeting rooms), and so on. In most cases, they are sound power tests used to investigate grades. It may take a large, quiet place to complete engineering grade measurements.

For sound quality measurements, the effect of the environment on the sound may be the opposite part of the test, such as sound recording in a car. In such cases, internal acoustics are not a problem, and potential interference from environmental sounds needs to be considered.

Advantages and disadvantages of other environments:

Advantages: No special test room is required.

Disadvantages: It may be necessary to measure more positions, extend the test time; lower measurement accuracy; more environmental noise interference may occur.

Industry Standard:

ANSI S12.12, ANSI S12.36, ISO 3746.

-S200: setting a noise collector in the artificial head;

The noise collector provided in the artificial head in the present invention may be an instrument for testing the sound quality of the handset call similar to the fine speech voice, and the audio analyzer is used to measure the loudness and the like of the received noise.

The measurement microphone and the measurement comparison module connected to the measurement microphone can also be used to measure the noise signal before and after the noise reduction function of the microphone recording noise reduction earphone is turned on, and the measurement comparison module receives the two recording signals of the measurement microphone and performs comparison processing to obtain noise reduction. The amount of noise reduction in the headphones. At this time, the sound emitted by the noise source is sealed in the closed cavity, and the closed cavity includes a test panel capable of forming a coupling cavity with the noise canceling earphone, and the test panel has a guide for transmitting the sound of the noise source to the inside of the coupling cavity. a sound hole, the test panel also has a mounting hole, the measuring microphone is mounted on the mounting hole in the direction of the coupling cavity, and the noise signal before and after the noise reduction function of the microphone recording noise canceling head is measured, and the measuring and comparing module receives the measuring microphone. Record the signal twice and compare it to get the noise reduction of the noise canceling headphones.

Wherein, the closed cavity may include one or more test panels, and the number of measurement microphones is the same as the number of test panels, and the two are in one-to-one correspondence; when the closed cavity includes a plurality of test panels, each test panel can Cooperating with the corresponding noise canceling earphone to form a coupling cavity; each test panel has a sound guiding hole for transmitting the sound of the noise source to the corresponding coupling cavity; and each test panel has a mounting hole, and the corresponding measuring microphone Mounted on the mounting hole toward the corresponding coupling cavity; each measuring microphone is used to record a noise signal before and after the noise canceling function is turned on by the noise canceling headphone; and the measuring and comparing module is configured to receive the two recording signals of each measuring microphone and The comparison process is performed to obtain the noise reduction amount of each noise canceling earphone.

-S300: uniformly setting a noise source at an equal distance from the noise canceling earphone in the closed cavity;

Step S300 places the noise source in the closed cavity such that the sound emitted by the noise source is sealed in the closed cavity.

The noise source may be located in the closed cavity, so that the sound of the noise source is directly enclosed in the closed cavity, and the noise source may be a speaker or an acoustic device; or the noise source may be located outside the closed cavity and closed. The interfaces on the cavity are connected to form an integral seal, so that the sound emitted by the noise source is transmitted to the closed cavity. The noise source at this time can be a simulated nozzle.

- S400: The noise source plays noise, and the noise collector detects a noise signal before and after the noise reduction headphone turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.

The test method of the present invention can analyze or display test data by connecting a noise collector to the smart terminal. Here, the smart terminal can be implemented in various forms. For example, the smart terminal described in the present invention may include mobiles such as mobile phones, smart phones, notebook computers, PDAs (Personal Digital Assistants), PADs (Tablets), PMPs (Portable Multimedia Players), navigation devices, smart watches, and the like. Storage devices, as well as fixed terminals such as digital TVs, desktop computers, and the like. The present invention is described assuming that the terminal is a mobile storage device and assuming that the mobile storage device is a smart phone. However, those skilled in the art will appreciate that configurations in accordance with embodiments of the present invention can be applied to fixed type terminals in addition to components that are specifically for mobile purposes. For convenience of description, the embodiments of the present invention are described by taking a smart phone as an example, and other application scenarios may be referred to each other.

In a preferred embodiment:

The noise source is one or more;

In a preferred embodiment:

The closed cavity is a cube;

In the above embodiment, the closed cavity may be designed as a cube having a uniform medium, and the noise source is one or more. When the noise source is one, the noise source can be placed at a certain position on the line plane of the noise canceling earphone. When there are multiple noise sources, multiple noise sources are equally spaced from the noise canceling earphones and evenly distributed in the closed cavity. For example, there are four noise sources, which can be placed at the four corners of the same side of the cube, for example, noise sources. Eight, you can place them at each inner corner of the cube.

Referring to Figure 2, in a preferred embodiment:

The noise source plays the noise, and the noise collector detects the noise signal before and after the noise canceling function is turned on, and the step of obtaining the noise reduction amount of the noise canceling earphone includes:

The noise source plays noise;

Referring to Figure 3, in a preferred embodiment:

The noise source simulates different noise environments and plays noise;

In this embodiment, simulating different noise environments may simulate various common noisy noise environments such as subways, restaurants, airplanes, trains, and the like.

4, 5, the present invention also discloses a noise reduction earphone testing system 100, including a noise canceling earphone setting module 11, a noise collector setting module 12, a noise source setting module 13, a noise reduction amount detecting module 14;

The noise canceling earphone setting module 11 is provided with a closed cavity, and an artificial head is disposed in the center of the closed cavity, and the artificial head wears the noise canceling earphone;

The noise collector setting module 12 is configured to set a noise collector in the artificial head;

The noise source setting module 13 is configured to uniformly set a noise source at an equal distance from the noise reduction earphone in the closed cavity;

The noise reduction amount detecting module 14 plays the noise, and the noise collector detects a noise signal before and after the noise canceling function is turned on to obtain a noise reduction amount of the noise canceling headphone.

In a preferred embodiment:

The noise source is one or more;

The noise reduction amount detecting module 14 is configured to: when the noise source is multiple, a plurality of the noise sources simultaneously play equal loudness noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function Obtaining a noise reduction amount of the noise canceling earphone.

In a preferred embodiment:

The closed cavity is a cube;

In a preferred embodiment:

The noise reduction amount detecting module 14 includes a left ear detecting unit, a right ear detecting unit, and a total detecting unit;

In a preferred embodiment:

The noise reduction amount detecting module 14 simulates different noise environments and plays noise, and the noise collector detects that the noise canceling headphones turn on noise before and after the noise reduction function in the different noise environment. A signal is obtained to obtain a noise reduction amount of the noise canceling earphone in the different noise environment.

For the above system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

It should be noted that the embodiments of the present invention are preferred embodiments, and are not intended to limit the scope of the present invention. Any one skilled in the art may use the above-disclosed technical contents to change or modify the equivalent embodiments. Any modification or equivalent changes and modifications of the above embodiments in accordance with the technical spirit of the present invention are still within the scope of the technical solutions of the present invention.

Claims

A noise reduction earphone testing method, characterized in that the method comprises the following steps:

Providing a closed cavity, an artificial head is disposed in the center of the closed cavity, and the artificial head wears the noise canceling earphone;

Providing a noise collector in the artificial head;

Forming a noise source uniformly at an equal distance from the noise canceling earphone in the closed cavity;

The noise source plays noise, and the noise collector detects a noise signal before and after the noise reduction headphone turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.
The test method according to claim 1, wherein

The noise source is one or more;

When the noise source is multiple, the noise source plays noise, and the noise collector detects a noise signal before and after the noise reduction headphone turns on the noise reduction function, and the step of obtaining the noise reduction amount of the noise reduction earphone includes:

A plurality of the noise sources simultaneously play equal loudness noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.
The test method according to claim 1, wherein

The closed cavity is a cube;

The noise sources are four, distributed at the four corners of the same face of the cube.
The test method according to claim 1, wherein

The noise source plays the noise, and the noise collector detects the noise signal before and after the noise canceling function is turned on, and the step of obtaining the noise reduction amount of the noise canceling earphone includes:

The noise source plays noise;

The noise canceling headphone opens a noise reduction function of the left ear, and the noise collector detects a noise signal before and after the noise reduction function of the noise canceling headphone to open the left ear, and obtains a left ear noise reduction amount of the noise canceling earphone;

The noise canceling headphone turns off the noise reduction function of the left ear, and opens the noise reduction function of the right ear, and the noise collector detects the noise signal before and after the noise reduction function of the noise canceling headphone to open the right ear, and obtains the noise canceling earphone. Right ear noise reduction;

The noise canceling headphone opens a noise reduction function of the binaural, and the noise collector detects a noise signal before and after the noise canceling function of the noise canceling headphone to open the binaural earphone, and obtains a total noise reduction amount of the noise canceling earphone.
The test method according to claim 1, wherein

The noise source plays the noise, and the noise collector detects the noise signal before and after the noise canceling function is turned on, and the step of obtaining the noise reduction amount of the noise canceling earphone includes:

The noise source simulates different noise environments and plays noise;

The noise collector detects that, in the different noise environment, the noise canceling headphone turns on a noise signal before and after the noise reduction function, and obtains a noise reduction amount of the noise canceling headphone in the different noise environment.
A noise reduction earphone testing system, comprising: a noise reduction earphone setting module, a noise collector setting module, a noise source setting module, and a noise reduction amount detecting module;

The noise reduction earphone setting module is provided with a closed cavity, and an artificial head is disposed in the center of the closed cavity, and the artificial head wears the noise canceling earphone;

The noise collector setting module is configured to set a noise collector in the artificial head;

The noise source setting module is configured to uniformly set a noise source at an equal distance from the noise reduction earphone in the closed cavity;

The noise reduction amount detecting module, the noise source plays noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function, and obtains a noise reduction amount of the noise canceling earphone.
The test system of claim 6 wherein:

The noise source is one or more;

The noise reduction amount detecting module, when the noise source is multiple, a plurality of the noise sources simultaneously play equal loudness noise, and the noise collector detects a noise signal before and after the noise canceling function turns on the noise reduction function, The noise reduction amount of the noise canceling earphone is obtained.
The test system of claim 6 wherein:

The closed cavity is a cube;

The noise sources are four, distributed at the four corners of the same face of the cube.
The test system of claim 6 wherein:

The noise reduction amount detecting module includes a left ear detecting unit, a right ear detecting unit, and a total detecting unit;

The left ear detecting unit, the noise source plays noise; the noise canceling headphone opens a noise reduction function of the left ear, and the noise collector detects a noise signal before and after the noise canceling function of the noise canceling headphone is turned on, Obtaining a noise reduction amount of the left ear of the noise canceling earphone;

The right ear detecting unit, the noise canceling headphone turns off the noise reduction function of the left ear, opens the noise reduction function of the right ear, and the noise collector detects the noise signal before and after the noise reduction function of the noise canceling headphone to open the right ear Obtaining a noise reduction amount of the right ear of the noise canceling earphone;

The total detecting unit, the noise canceling earphone opens a noise reduction function of the binaural, and the noise collector detects a noise signal before and after the noise canceling function of the noise canceling earphone to open the binaural noise reduction function, and obtains a total of the noise canceling earphone Noise reduction.
The test system of claim 6 wherein:

The noise reduction amount detecting module, the noise source simulates different noise environments, and plays noise, and the noise collector detects that, in the different noise environment, the noise canceling headphone opens a noise signal before and after the noise reduction function Obtaining a noise reduction amount of the noise canceling earphone in the different noise environment.