CN118338231A - Earphone bottom noise test judging method - Google Patents
Earphone bottom noise test judging method Download PDFInfo
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- CN118338231A CN118338231A CN202410428398.2A CN202410428398A CN118338231A CN 118338231 A CN118338231 A CN 118338231A CN 202410428398 A CN202410428398 A CN 202410428398A CN 118338231 A CN118338231 A CN 118338231A
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Abstract
The invention discloses a method for judging the noise floor test of an earphone, which comprises the following steps: firstly, preparing earphone test equipment, a test amplifier and an earphone test jig in a silencing chamber; step two, preparing a mute audio file; step three, placing the test earphone on an earphone test fixture and carrying out Bluetooth connection with the mobile phone; playing the audio file and starting the test; fifthly, the earphone test fixture receives and converts the acoustic signals output by the test earphone into electric signals, the electric signals are transmitted to the test amplifier for processing, the processed electric signals are transmitted to the earphone test equipment, and the earphone test equipment processes the electric signals to generate a background noise curve graph; step six, comparing and analyzing the obtained background noise curve graph with preset background noise data; therefore, the earphone test fixture is utilized to receive the acoustic signals, convert the acoustic signals into electric signals and then transmit the electric signals to other equipment to obtain a background noise curve graph, and further judge the background noise problem of the test earphone, so that whether the background noise of the test earphone is qualified is distinguished.
Description
Technical Field
The invention relates to the technology in the field of earphone testing, in particular to a method for judging the noise test of an earphone.
Background
The noise floor is totally called as noise floor, noise floor refers to noise which is not expected to occur in equipment, such as electric noise floor generated by a circuit, and the noise floor in an earphone is also basically circuit noise floor, but the part of circuit noise floor is converted into an acoustic signal through a loudspeaker, so that the acoustic signal can be perceived by a user; the reasons for the generation of the background noise are various, and although the background noise is circuit background noise, the basic reasons are different, and for a Bluetooth headset, three different background noise sources exist, namely: the final result of mixing is the noise perceived by the user, and the noise problem often greatly reduces the use experience of the earphone, and if the earphone is not controlled, a large amount of returns and bad comments are easy to appear. For brands desiring to travel to a medium and high end route, the problem of noise floor can have a significant negative impact on the brand. Several well known brands in the industry have cases where bulk returns are caused by ANC noise floor problems.
At present, the background noise of the Bluetooth earphone cannot be completely eliminated and can only be reduced and optimized, but just as the reason that the hearing of the human ear is limited, when the background noise is small enough, people cannot hear the influence of the background noise, so that the background noise is controlled to be lower than the hearing limit of the human ear, the background noise cannot be heard, the influence of the background noise problem cannot be caused, the background noise is very slight sound and is a small signal, the general equipment is often insufficient to capture the corresponding signal, and the background noise of a test system needs to be ensured to be far lower than the background noise of the earphone, so that the background noise problem can be accurately and effectively detected and distinguished.
The existing earphone background noise judgment method mainly comprises two methods: 1. the AP is used for testing the waveform of the Bluetooth PCBA output electric signal, but the PCBA is used for testing too one side, the structure, the software and the loudspeaker, and the process can influence the size of the bottom noise; 2. in a quiet environment (such as a sound elimination room), the degree of background noise is judged by subjective hearing of human ears, but the subjective influence of various factors such as individual hearing, state and mood is high in error breaking rate.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
In view of the above, the present invention aims at overcoming the drawbacks of the prior art, and its main objective is to provide a method for determining the noise floor of an earphone, which uses an earphone testing tool to receive an acoustic signal, convert the acoustic signal into an electrical signal, and transmit the electrical signal to other devices to obtain a noise floor graph, so as to determine the noise floor problem of the earphone, and thus determine whether the noise floor of the earphone is qualified.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a method for judging the noise floor test of an earphone comprises the following steps:
Firstly, preparing earphone test equipment, a test amplifier and an earphone test jig in a silencing chamber, wherein the test amplifier is respectively connected with the earphone test equipment and the earphone test jig;
step two, preparing a section of audio file close to silence, and storing the audio file into the mobile phone;
placing the test earphone on an earphone test fixture, and connecting the test earphone with a mobile phone through Bluetooth;
step four, playing the audio file by using the mobile phone, and starting the test;
Fifthly, the earphone test fixture receives and converts the acoustic signals output by the test earphone into electric signals, then sends the electric signals to the test amplifier for processing, and sends the processed electric signals to earphone test equipment which processes the electric signals to generate a background noise curve graph;
And step six, analyzing according to the obtained background noise curve graph, judging the test earphone as a qualified earphone if the background noise curve graph of the test earphone does not have background noise dB data exceeding the preset background noise dB data, and judging the test earphone as a disqualified earphone if the background noise curve graph of the test earphone has background noise dB data exceeding the preset background noise dB data.
In the third step, the test earphone is a conventional earphone or an earphone with the noise reduction function not started, or the test earphone is an earphone with the noise reduction function started.
As a preferred solution, the earphone test device is a Soundcheck device.
As a preferred scheme, earphone test fixture is including pedestal and microphone, the emulation ear of setting on the pedestal, the microphone sets up in the inside of pedestal, the microphone has the receiving terminal, the corresponding receiving terminal of pedestal is provided with the opening, the emulation ear is fixed in the pedestal through the installed part and sets up in the open-ended upper end, the emulation ear has the earphone locating hole that link up from top to bottom, earphone locating hole and opening intercommunication, the microphone is connected in test amplifier.
As a preferable scheme, the earphone positioning port is gradually reduced from top to bottom.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and particularly, the technical scheme mainly comprises the steps of receiving the acoustic signals by using the earphone test jig, converting the acoustic signals into the electric signals and then transmitting the electric signals to other equipment to obtain a background noise curve graph, and further judging the background noise problem of the test earphone, so that whether the background noise of the test earphone is qualified or not is distinguished, the quality of products is ensured, and the experience effect of users is improved.
In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a graph of the background noise of a first type of test earphone (the test earphone is not turned on for noise reduction) according to an embodiment of the present invention;
FIG. 2 is a graph of the background noise of a second type of test earphone (the test earphone is not turned on for noise reduction) according to an embodiment of the present invention;
FIG. 3 is a graph of the background noise of a third type of test earphone (the test earphone is not turned on for noise reduction) according to an embodiment of the present invention;
FIG. 4 is a graph of the background noise of a fourth test earphone (the test earphone is not turned on for noise reduction) according to an embodiment of the present invention;
FIG. 5 is a graph of the background noise of a fifth test earphone (the test earphone is turned on for noise reduction) according to an embodiment of the present invention;
FIG. 6 is a graph of the background noise of a sixth test earphone (the test earphone is turned on for noise reduction) according to an embodiment of the present invention;
FIG. 7 is a graph of the background noise of a seventh test earphone (the test earphone is turned on for noise reduction) according to an embodiment of the present invention;
FIG. 8 is a graph of the background noise of an eighth test earphone (the test earphone is turned on for noise reduction) according to an embodiment of the present invention;
FIG. 9 is a block diagram of a test method according to an embodiment of the invention;
Fig. 10 is a schematic structural diagram of an earphone testing jig according to an embodiment of the invention.
The attached drawings are used for identifying and describing:
11. earphone test fixture 111, pedestal
112. Microphone 113, artificial ear
114. Receiving end 115, opening
116. Earphone positioning port 12 and mounting member
13. The earphone was tested.
Detailed Description
Referring to fig. 1 to 10, specific structures of embodiments of the present invention are shown.
A method for judging the noise floor test of an earphone comprises the following steps:
Firstly, preparing earphone test equipment, a test amplifier and an earphone test jig 11 in a silencing chamber, wherein the test amplifier is respectively connected with the earphone test equipment and the earphone test jig 11; specifically, the earphone testing fixture 11 includes a base 111, a microphone 112 disposed on the base 111, and a dummy ear 113, and the test amplifier is directly connected to the microphone 112;
Step two, preparing a section of audio file close to silence, storing the audio file into a mobile phone, and preparing to play by using the test earphone 13 in the silencing room;
Step three, placing the test earphone 13 on the earphone test fixture 11, and connecting the test earphone 11 with the mobile phone through Bluetooth;
step four, playing the audio file by using the mobile phone, and starting the test;
Step five, the microphone 112 receives and converts the acoustic signals output by the test earphone into electrical signals, and then sends the electrical signals to the test amplifier for processing, the processed electrical signals are sent to earphone test equipment, and the earphone test equipment processes the electrical signals to generate a background noise curve graph;
Step six, analyzing according to the obtained background noise curve graph, if the background noise curve graph of the test earphone does not have background noise dB data exceeding the preset background noise dB data, judging the test earphone as a qualified earphone, and if the background noise curve graph of the test earphone has background noise dB data exceeding the preset background noise dB data, judging the test earphone as a disqualified earphone; it should be noted that, when the test earphone is a conventional earphone or an earphone with the noise reduction function not being started, the dB of the preset base noise data is 5dB at the highest, and when the test earphone is an earphone with the noise reduction function being started, the dB of the preset base noise data is 8dB at the highest; therefore, the earphone testing jig is utilized to receive the acoustic signals, then the acoustic signals are converted into electric signals and then are transmitted to other equipment to obtain a background noise curve graph, and the background noise curve graph is analyzed and compared with a preset background noise curve graph, so that the background noise problem of the test earphone is judged, whether the background noise of the test earphone is qualified or not is judged, the quality of products is guaranteed, and the experience effect of a user is improved.
In the third embodiment, in the step three, the test earphone is a conventional earphone or an earphone with a noise reduction function not turned on, or the test earphone is an earphone with a noise reduction function turned on, and the earphone test device is a Soundcheck device.
The microphone 112 is disposed in the base 111, the microphone 112 has a receiving end 114, the base 111 is provided with an opening 115 corresponding to the receiving end 114, the dummy ear 113 is fixed on the base 111 by the mounting member 12 and is disposed at an upper end of the opening 115, the dummy ear 113 has an earphone positioning opening 116 penetrating up and down, the earphone positioning opening 116 is communicated with the opening 115, and the earphone positioning opening 116 is disposed in a manner that the earphone positioning opening 116 is gradually reduced from top to bottom, so that an acoustic signal output by the earphone can be tested to enter the microphone from the opening, and the subsequent acoustic signal receiving processing operation is facilitated.
The design key point of the invention is that through the design of each step, the earphone testing jig is utilized to receive the acoustic signals, then the acoustic signals are converted into electric signals and then are transmitted to other equipment to obtain a background noise curve graph, and the background noise curve graph is analyzed and compared with a preset background noise curve graph, so that the background noise problem of the testing earphone is judged, whether the background noise of the testing earphone is qualified or not is judged, the quality of products is ensured, and the experience effect of users is improved.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.
Claims (5)
1. The earphone noise floor test judging method is characterized by comprising the following steps:
Firstly, preparing earphone test equipment, a test amplifier and an earphone test jig in a silencing chamber, wherein the test amplifier is respectively connected with the earphone test equipment and the earphone test jig;
step two, preparing a section of audio file close to silence, and storing the audio file into the mobile phone;
placing the test earphone on an earphone test fixture, and connecting the test earphone with a mobile phone through Bluetooth;
step four, playing the audio file by using the mobile phone, and starting the test;
Fifthly, the earphone test fixture receives and converts the acoustic signals output by the test earphone into electric signals, then sends the electric signals to the test amplifier for processing, and sends the processed electric signals to earphone test equipment which processes the electric signals to generate a background noise curve graph;
And step six, analyzing according to the obtained background noise curve graph, judging the test earphone as a qualified earphone if the background noise curve graph of the test earphone does not have background noise dB data exceeding the preset background noise dB data, and judging the test earphone as a disqualified earphone if the background noise curve graph of the test earphone has background noise dB data exceeding the preset background noise dB data.
2. The earphone background noise test determination method according to claim 1, wherein: in the third step, the test earphone is a conventional earphone or an earphone with the noise reduction function not started, or the test earphone is an earphone with the noise reduction function started.
3. The earphone background noise test determination method according to claim 1, wherein: the earphone test device is a Soundcheck device.
4. The earphone background noise test determination method according to claim 1, wherein: the earphone test fixture comprises a base, a microphone and a simulation ear, wherein the microphone and the simulation ear are arranged on the base, the microphone is arranged in the base, the microphone is provided with a receiving end, the base is provided with an opening corresponding to the receiving end, the simulation ear is fixed on the base through a mounting piece and is arranged at the upper end of the opening, the simulation ear is provided with an earphone positioning opening which is communicated up and down, the earphone positioning opening is communicated with the opening, and the microphone is connected with a test amplifier.
5. A headset noise test determination method according to claim 3, wherein: the earphone positioning port is gradually reduced from top to bottom.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118338231A true CN118338231A (en) | 2024-07-12 |
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