CN115297421A - Earphone sound leakage testing method and device - Google Patents

Earphone sound leakage testing method and device Download PDF

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Publication number
CN115297421A
CN115297421A CN202210876696.9A CN202210876696A CN115297421A CN 115297421 A CN115297421 A CN 115297421A CN 202210876696 A CN202210876696 A CN 202210876696A CN 115297421 A CN115297421 A CN 115297421A
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earphone
tested
microphone
sound
test
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Chinese (zh)
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石伟
李坚维
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Shenzhen Timekettle Technologies Co ltd
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Shenzhen Timekettle Technologies Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The earphone leakage test method provided by the invention sends signals with the same frequency to an earphone to be tested through an audio analyzer so as to obtain the reference voltage of the earphone leakage test; under the reference voltage, sending a sweep frequency signal to the earphone to be tested through an audio analyzer; a second test microphone is arranged at a certain distance from the earphone to be tested, and a sound pressure signal of the second test microphone is measured through an audio analyzer; and when the sound pressure signal measured by the second test microphone is smaller than a set certain decibel value, the sound leakage effect of the earphone to be tested is qualified, otherwise, the sound leakage effect of the earphone to be tested is unqualified. The invention also provides an earphone sound leakage testing device based on the method, and the method can effectively control the problem of sound leakage of the earphone and improve the subjective experience of a wearer by obtaining the testing standard of sound leakage of the earphone.

Description

Earphone sound leakage testing method and device
Technical Field
The invention relates to the field of earphones, in particular to an earphone sound leakage testing method and device.
Background
The earphone is a pair of conversion units that receive electrical signals from a media player or receiver and convert them into audible sound waves using speakers near the ears. The earphone can be separated from the media player, can be connected by using Bluetooth wireless communication or a plug, can listen to the sound independently without influencing other people, and has better privacy. The earphone is originally used for telephone and radio, but with the prevalence of portable electronic devices, the earphone is often used for mobile phones, walkmans, radios, portable electronic games, digital audio players, and the like.
The problem of sound leakage of the earphone not only affects surrounding people and brings noise to people in the actual use process, but also easily reveals privacy information of an earphone wearer, such as communication contents which do not want to be heard by others in the communication process. At present, when earphones are produced, the music audio frequency of the earphones or the side tone of a conversation mode is usually tested, but the sound leakage condition of the earphones in use cannot be tested, although a plurality of people propose some ways for reducing the sound leakage of the earphones in order to avoid serious sound leakage of the earphones, no people provide a test method and a test standard for testing the sound leakage of the earphones; when a consumer purchases the earphone, the sound leakage condition is often judged only through the sense organ of the consumer, the subjective feelings of different people are different, the sound leakage effect requirements of the earphone are different, and the standards cannot be unified.
Disclosure of Invention
The invention aims to provide a method for testing sound leakage of an earphone, which obtains the sound leakage test standard of the earphone, so that the other people are not influenced in the process of using the earphone, and the leakage of private information of a user caused by sound leakage of the earphone is avoided.
In order to achieve the above object, the present invention provides a method for testing earphone leakage, comprising the following steps;
s1, arranging a first test microphone at an earphone to be tested, sending signals with the same frequency to the earphone to be tested through an audio analyzer, receiving sound pressure signals from the first test microphone at the same time, and obtaining reference voltage of an earphone sound leakage test according to the sound pressure signals;
s2, under the reference voltage, sending a sweep frequency signal to the earphone to be tested through an audio analyzer;
s3, arranging a second test microphone at a certain distance from the earphone to be tested, and measuring a sound pressure signal of the second test microphone through the audio analyzer;
and S4, when the sound pressure signal measured by the second test microphone is smaller than a set certain decibel value, the sound leakage effect of the earphone to be tested is qualified, otherwise, the sound leakage effect of the earphone to be tested is unqualified.
According to one embodiment of the invention, the noise of the environment in which the earphone leakage test is performed is lower than 30 decibels.
According to an embodiment of the present invention, in step S1, the earphone to be tested is placed on a simulated ear simulating a human trunk, the audio analyzer sends a constant frequency signal with a frequency of 1kHz to the earphone to be tested, and adjusts a voltage of the audio analyzer, and when a sound pressure signal measured by the audio analyzer at the simulated ear is a 94 db value, the voltage value of the audio analyzer at this time is set as a reference voltage.
According to one embodiment of the invention, the frequency sweep signal range is 20Hz to 20kHz.
According to an embodiment of the present invention, in the step S3, a distance between the second test microphone and the to-be-tested earphone is 50CM.
According to an embodiment of the present invention, in the step S4, when the sound pressure signal measured by the second test microphone is less than 55db, the sound leakage effect of the to-be-tested earphone is qualified, otherwise, the to-be-tested earphone is not qualified.
Another object of the present invention is to provide an earphone leakage testing device, which is located in a sound-deadening room with noise lower than 30 db, and comprises an audio analyzer, a dummy ear, an earphone to be tested, a first testing microphone, and a second testing microphone,
the audio frequency analysis appearance respectively with the earphone that awaits measuring, first test microphone and second test microphone are connected, first test microphone and second test microphone all are used for receiving to come from the sound pressure signal of the earphone that awaits measuring, the earphone that awaits measuring wear in on the artificial ear, first test microphone sets up artificial ear department, the earphone that awaits measuring with distance between the second test microphone is 50CM, the audio frequency analysis appearance be used for to the earphone that awaits measuring sends a signal, still is used for measuring the earphone that awaits measuring is located the sound pressure signal and the measurement of artificial ear department the sound pressure signal of second test microphone.
The earphone leakage sound testing method provided by the invention sends signals with the same frequency to an earphone to be tested through an audio analyzer so as to obtain the reference voltage of earphone leakage sound testing; keeping the reference voltage unchanged, and sending a sweep frequency signal to the earphone to be tested through an audio analyzer; a second test microphone is arranged at a certain distance from the earphone to be tested, and a sound pressure signal of the second test microphone is measured through an audio analyzer; and when the sound pressure signal measured by the second test microphone is smaller than a set certain decibel value, the sound leakage effect of the earphone to be tested is qualified, otherwise, the sound leakage effect of the earphone to be tested is unqualified. The testing standard of the earphone sound leakage is obtained through the method, the problem of sound leakage of the earphone can be effectively controlled, and the subjective experience of a wearer is improved.
Drawings
Fig. 1 is a schematic flow chart of a method for testing sound leakage of an earphone according to the present invention;
FIG. 2 is a schematic view of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the earphone leakage test device provided by the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
As shown in fig. 1, a method for testing earphone leakage is provided, which comprises the following steps;
the method comprises the following steps that S1, a first testing microphone is arranged at an earphone to be tested, in the embodiment of the invention, the first testing microphone is arranged at a simulated ear position in a simulated human body trunk, the earphone to be tested is worn on the simulated ear, signals with the same frequency are sent to the earphone to be tested through an audio analyzer, meanwhile, a sound pressure signal from the first testing microphone is received, and a reference voltage of an earphone sound leakage test is obtained according to the sound pressure signal;
s2, under the reference voltage, sending a sweep frequency signal to the earphone to be tested through an audio analyzer;
s3, arranging a second test microphone at a certain distance from the earphone to be tested, and measuring a sound pressure signal of the second test microphone through an audio analyzer;
and S4, when the sound pressure signal measured by the second test microphone is smaller than a set certain decibel value, the sound leakage effect of the earphone to be tested is qualified, otherwise, the sound leakage effect of the earphone to be tested is unqualified.
In the embodiment of the invention, the noise of the environment where the earphone sound leakage test is carried out is lower than 30 decibels, and the test is usually carried out in a silencing room.
In the embodiment of the invention, because different earphones are worn at the simulated ear, the voltage signals provided by the audio analyzer under the condition of generating the same sound pressure are different, in order to more accurately obtain the sound leakage condition of the earphones and more uniform test standard, the reference voltage of the sound leakage test of the earphones is usually determined firstly, and the reference voltage of the sound leakage test of the earphones obtained by the invention is as follows: the earphone that will await measuring is placed on the artificial ear in the human trunk of simulation, send the constant frequency signal that frequency is 1kHz to the earphone that awaits measuring through audio analyzer, and adjust audio analyzer's voltage, make the acoustic pressure that is located the artificial ear department of the human trunk of simulation change, and carry out real-time supervision to the acoustic pressure signal that the artificial ear department changed through audio analyzer, when the acoustic pressure signal that audio analyzer monitored through first test microphone is 94 decibels value, stop to adjust audio analyzer's voltage size, and set for reference voltage with the voltage value that this moment audio analyzer located. When the leakage detection is performed on different earphones, the leakage reference voltage of the earphones needs to be corrected, and the following leakage detection can be started.
The frequency range of a commonly used earphone signal is not fixed, and in order to accurately detect the sound leakage effect of the earphone, the frequency sweeping signal is sent to the earphone to be detected by the audio analyzer, wherein the frequency sweeping signal range is 20Hz to 20kHz. As shown in fig. 2, it is shown that the test data of the sound leakage test of the two earphones, the main frequency bands of the sound leakage are mainly 20Hz-1.5khz and 5kHz-8kHz, it can be seen that when the signal frequency of the earphone 1 is 6kHz to 7kHz, the sound pressure signal measured by the second test microphone is 60 db, and when the signal frequency is 5kHz, the sound pressure signal measured by the second test microphone is 56 db, and therefore it can be seen that the earphone 1 has serious sound leakage and is not qualified. In the signal frequency range of the earphone 2, the maximum sound pressure signals measured by the second testing microphone are 54 decibels which are less than 55 decibels, and the sound leakage is not serious, so that the earphone belongs to a qualified earphone.
In the embodiment of the present invention, it is preferable that the second testing microphone directly faces the position of the to-be-tested earphone, and the distance between the second testing microphone and the to-be-tested earphone is 50CM, at this time, if the sound pressure signals measured by the second testing microphone are all smaller than 55db, the sound leakage effect of the to-be-tested earphone is qualified, otherwise, the to-be-tested earphone is unqualified.
When the distance between the second test microphone and the earphone to be tested is not 50CM, the sound pressure standard monitored by the second test microphone is changed by 55 decibels, specifically, the calculation method is as follows:
Figure BDA0003762442470000051
wherein r is 1 ＝50CM，r 2 The actual distance between the second test microphone and the headset to be tested. That is, when the distance between the second test microphone and the earphone to be tested is r 2 And if the sound pressure signal monitored by the second test microphone is less than 55dB plus delta dB, the earphone to be tested is a qualified earphone, otherwise, the earphone to be tested is an unqualified earphone.
In addition, the present invention provides an earphone sound leakage testing device based on the above earphone sound leakage testing method, the device is located in a sound-deadening chamber with noise lower than 30 db, as shown in fig. 3, and comprises an audio analyzer 10, a simulated ear 20 simulating the trunk of a human body, an earphone 30 to be tested, a first testing microphone (not shown in the figure) and a second testing microphone 40,
the audio analyzer 10 is respectively connected with the earphone 30 to be tested, the first test microphone and the second test microphone 40 are both used for receiving sound pressure signals from the earphone 30 to be tested, the earphone 30 to be tested is worn on a simulated ear, the first test microphone is arranged at the position of the simulated ear, the distance between the earphone 30 to be tested and the second test microphone 40 is 50CM, the audio analyzer 10 is used for sending signals to the earphone 30 to be tested and is also used for measuring the sound pressure signals of the earphone 30 to be tested at the position of the simulated ear 20 and measuring the sound pressure signals of the second test microphone 40.
In summary, the earphone leakage test method provided by the invention sends signals with the same frequency to the earphone to be tested through the audio analyzer to obtain the reference voltage of the earphone leakage test; keeping the reference voltage unchanged, and sending a sweep frequency signal to the earphone to be tested through an audio analyzer; a second test microphone is arranged at a certain distance from the earphone to be tested, and a sound pressure signal of the second test microphone is measured through an audio analyzer; and when the sound pressure signal measured by the second test microphone is smaller than a set certain decibel value, the sound leakage effect of the earphone to be tested is qualified, otherwise, the sound leakage effect of the earphone to be tested is unqualified. The testing standard of the earphone sound leakage is obtained through the method, the problem of sound leakage of the earphone can be effectively controlled, and the subjective experience of a wearer is improved.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (7)

1. A method for testing sound leakage of an earphone is characterized by comprising the following steps;
s1, arranging a first test microphone at an earphone to be tested, sending signals with the same frequency to the earphone to be tested through an audio analyzer, receiving sound pressure signals from the first test microphone at the same time, and obtaining reference voltage of an earphone sound leakage test according to the sound pressure signals;
s2, under the reference voltage, sending a sweep frequency signal to the earphone to be tested through an audio analyzer;
s3, arranging a second test microphone at a certain distance from the earphone to be tested, and measuring a sound pressure signal of the second test microphone through the audio analyzer;
and S4, when the sound pressure signal measured by the second test microphone is smaller than a set certain decibel value, the sound leakage effect of the earphone to be tested is qualified, otherwise, the sound leakage effect of the earphone to be tested is unqualified.
2. The method as claimed in claim 1, wherein the noise of the environment is lower than 30 db.
3. The method for testing earphone leakage according to claim 2, wherein in step S1, the earphone to be tested is placed on a simulated ear simulating the trunk of a human body, the audio analyzer sends a constant frequency signal with a frequency of 1kHz to the earphone to be tested, the voltage of the audio analyzer is adjusted, and when the sound pressure signal measured by the audio analyzer at the simulated ear is 94 db, the voltage value at which the audio analyzer is located is set as the reference voltage.
4. The method as claimed in claim 3, wherein the frequency sweep signal range is 20Hz to 20kHz.
5. The method as claimed in claim 4, wherein in the step S3, the distance between the second testing microphone and the earphone to be tested is 50CM.
6. The method according to claim 5, wherein in step S4, when the sound pressure signal measured by the second testing microphone is less than 55dB, the sound leakage effect of the earphone to be tested is qualified, otherwise, the sound leakage effect of the earphone to be tested is unqualified.
7. A device for testing sound leakage of an earphone is characterized in that the device is positioned in a sound-deadening chamber with noise lower than 30 dB and comprises an audio analyzer, a simulation ear, an earphone to be tested, a first testing microphone and a second testing microphone,
the audio frequency analysis appearance respectively with the earphone that awaits measuring, first test microphone and second test microphone are connected, first test microphone and second test microphone all are used for receiving to come from the sound pressure signal of the earphone that awaits measuring, the earphone that awaits measuring wear in on the artificial ear, first test microphone sets up artificial ear department, the earphone that awaits measuring with distance between the second test microphone is 50CM, the audio frequency analysis appearance be used for to the earphone that awaits measuring sends a signal, still is used for measuring the earphone that awaits measuring is located the sound pressure signal and the measurement of artificial ear department the sound pressure signal of second test microphone.
CN202210876696.9A 2022-07-25 2022-07-25 Earphone sound leakage testing method and device Pending CN115297421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210876696.9A CN115297421A (en) 2022-07-25 2022-07-25 Earphone sound leakage testing method and device

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Application Number Priority Date Filing Date Title
CN202210876696.9A CN115297421A (en) 2022-07-25 2022-07-25 Earphone sound leakage testing method and device

Publications (1)

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CN115297421A true CN115297421A (en) 2022-11-04

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