CN108810745B - Howling test method, howling test system and related device - Google Patents
Howling test method, howling test system and related device Download PDFInfo
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- CN108810745B CN108810745B CN201810609640.0A CN201810609640A CN108810745B CN 108810745 B CN108810745 B CN 108810745B CN 201810609640 A CN201810609640 A CN 201810609640A CN 108810745 B CN108810745 B CN 108810745B
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
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Abstract
The invention relates to a howling test method, a howling test system and a device, wherein the method comprises the following steps: playing a specific sound to a sound pickup channel of a tested product, wherein the specific sound and a first sound signal output by the audio frequency of the tested product have the same phase and frequency; acquiring a second sound signal output by the audio frequency of the tested product, wherein the second sound signal is the sound output by the tested product after the first sound signal is superposed with the specific sound; and if the amplitude of the acquired second sound signal exceeds a preset threshold value, judging that the tested product generates howling. The invention can sensitively detect the squeaking problem of the Bluetooth earphone.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of communications technologies, and in particular, to a howling test method, a howling test system, and a related apparatus.
[ background of the invention ]
With the popularization of intelligent handheld devices, especially mobile phones, bluetooth is used as a standard, bluetooth headsets are more and more popular, and especially bluetooth headsets in sports scenes are more and more popular with consumers.
In an outdoor sport scene, when the Bluetooth headset is worn to listen to music, the sound of people around the headset is blocked outside the headset, so that the normal communication between people is influenced. In extreme cases, such as traffic accidents or dangerous situations, it may even cause injury to the user of the bluetooth headset. Thus, a channel for transmitting Ambient sound into the ear is required, i.e. an Ambient sound monitoring (Ambient audio) function is required. The technology commonly adopted by the Ambient microphone function at present is that after external sound is picked up by a microphone channel of the bluetooth headset, the sound is processed by a Digital Signal Processor (DSP) built in the bluetooth headset, and finally amplified and played from a loudspeaker of the bluetooth headset.
However, due to the structural design or production process control problem, music played from a loudspeaker of the bluetooth headset is picked up by a microphone channel of the bluetooth headset, the picked-up sound is played from the loudspeaker after passing through the Ambient microphone function, and is picked up again by the microphone channel and amplified and played, so that positive feedback is formed, the sound picked up from the loudspeaker by the microphone channel is larger and larger, and the 'howling sound' is generated, and the user experience is seriously influenced.
[ summary of the invention ]
The technical problem to be solved by the invention is to provide a howling test method, a howling test system and a related device, which can detect the howling problem of the Bluetooth headset more sensitively.
In order to solve the technical problems, the invention provides the following technical scheme:
in one aspect, the present invention provides a howling test method, including: playing a specific sound to a sound pickup channel of a tested product, wherein the specific sound and a first sound signal output by the audio frequency of the tested product have the same phase and frequency; acquiring a second sound signal output by the audio frequency of the tested product, wherein the second sound signal is the sound output by the tested product after the first sound signal is superposed with the specific sound; and if the amplitude of the acquired second sound signal exceeds a preset threshold value, judging that the tested product generates howling.
In some embodiments, playing the specific sound to the pickup channel of the tested product comprises: acquiring a first sound signal of the audio output of the tested product; the step of playing the specific sound to the pickup channel of the tested product specifically comprises the following steps: and converting the acquired first sound signal into sound and playing the sound to a sound pickup channel of the tested product.
In some embodiments, before converting the acquired first sound signal into sound and playing the sound to the pickup channel of the product under test, the method further includes: and amplifying the acquired first sound signal by preset times.
In some embodiments, the amplifying the acquired first sound signal by a preset multiple specifically includes: and amplifying the acquired first sound signal by preset times so that the amplitude of the amplified sound signal is the same as that of the first sound signal output by the audio frequency of the tested product.
In some embodiments, the particular sound is pink noise.
On the other hand, the invention also provides a howling test system, which comprises: the playing device is used for playing specific sound to a sound pickup channel of a tested product, and the specific sound and a first sound signal output by the audio frequency of the tested product have the same phase and the same frequency; the pickup nozzle is used for acquiring a second sound signal output by the audio frequency of the tested product after the playing device plays the sound; and the squeal detector is used for detecting the amplitude of the second sound signal acquired by the sound pickup mouth, and if the amplitude exceeds a preset threshold value, the squeal detector judges that the tested product generates squeal.
In some embodiments, the pickup nozzle is further used for acquiring a first sound signal of the audio output of the tested product before the specific sound is played to the pickup channel of the tested product by the playing device; the playing device comprises a loudspeaker and a sound pickup channel which is used for converting a first sound signal acquired by the sound pickup mouth into sound and playing the sound for a tested product.
In some embodiments, the system further comprises: and the amplifier is used for amplifying the first sound signal by preset times before the first sound signal is converted into sound by the loudspeaker and is played to a sound pickup channel of the tested product.
In some embodiments, the amplifier is configured to amplify the first sound signal by a preset factor such that the amplified sound signal has the same amplitude as the sound signal of the audio output of the product under test.
In some embodiments, the system further comprises a first sealed enclosure in which the playback device is disposed, the pickup path side of the product being tested being embedded in the enclosure.
In some embodiments, the system further comprises a second sealed enclosure in which the pickup nozzle is disposed, the horn side of the product being tested being embedded in the enclosure.
On the other hand, the invention also provides a howling test device, which comprises: the playing device is used for playing specific sound to a sound pickup channel of a tested product, and the specific sound and a first sound signal output by the audio frequency of the tested product have the same phase and the same frequency; and the sound pickup mouth is used for acquiring a second sound signal of the audio output of the tested product after the playing device plays the sound, and outputting the second sound signal to the howling detector.
Compared with the prior art, the implementation mode of the invention has the beneficial effects that:
in this embodiment, by playing the specific sound to the sound pickup channel of the product to be tested, since the specific sound and the first sound signal output by the audio frequency of the product to be tested are in the same phase and the same frequency, the sound pickup channel of the product to be tested picks up the sound signal with the increased amplitude obtained by superimposing the specific sound and the first sound signal, thereby amplifying the leakage problem of the product to be tested. By detecting whether the amplitude of the second sound signal of the audio output of the tested product exceeds a preset threshold value or not, the second sound signal of the audio output of the tested product comprises the sound signal picked up by the sound pick-up channel, and the amplitude of the picked-up sound signal is increased, so that the howling problem caused by leakage of the Bluetooth headset can be detected more sensitively and more accurately.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of an embodiment of a howling test system in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of a howling test system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another embodiment of a howling test system according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating an embodiment of a howling test method according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a howling test method according to another embodiment of the present invention;
fig. 6 is a flowchart illustrating a howling test method according to another embodiment of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items; the term "connect", as used herein, if a connection between circuits or electronic elements, includes a direct electrical connection or communication connection between the circuits or electronic elements, and also includes an indirect electrical connection between the circuits or electronic elements through other circuits or electronic elements.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a howling test system according to an embodiment of the present invention. As shown in fig. 1, the howling test system includes a playing device 110, a pickup nozzle 120, and a howling detector 130.
The product 30 to be tested may be a bluetooth mobile phone with a microphone channel, or may be other devices with a sound pickup channel. For convenience of understanding, the tested product 30 is exemplified as a bluetooth headset in the present embodiment. During the howling test, a player 20 is provided to connect with the bluetooth headset 30 and play the audio signal, and at this time, the bluetooth headset 30 outputs the first sound signal in audio. For example: the bluetooth player 20 and the bluetooth headset 30 perform a bluetooth audio connection, and the played audio signal is pink noise, and then the first sound signal output by the bluetooth headset 30 is also pink noise.
The playing device 110 is used to play a specific sound to the sound pickup channel 31 of the product under test 30, where the specific sound is in phase and same frequency as the first sound signal (e.g. pink noise received by the bluetooth headset from the bluetooth player) of the audio output of the product under test 30, i.e. has the same phase and frequency. The playing device 110 may be a mobile phone, an iPad, or other device with an audio playing function. The sound pickup channel of the bluetooth headset 30 may be a microphone channel.
The mouthpiece 120 is disposed at the audio output of the product under test 30, and is used to obtain a second sound signal of the audio output of the product under test 30, where the second sound signal is obtained after the specific sound played by the playing device 110 is received by the product under test 30. The second sound signal of the audio output of the bluetooth headset 30 comprises the pink noise signal received from the player 20 and the sound signal picked up by the microphone channel 31.
Due to structural design or manufacturing process control issues, the microphone channel 31 of the bluetooth headset 30 picks up the first sound signal (e.g., pink noise) played from the speaker 32 of the bluetooth headset 30. In this embodiment, the specific sound with the same phase and frequency as the first sound signal is played to the microphone channel 31 by the playing device 110, and the first sound signal and the specific sound are superimposed to obtain a second sound signal with a larger amplitude, so as to form a positive feedback.
And a howling detector 130 for detecting the amplitude of the second sound signal acquired by the sound pickup nozzle 120, and if the amplitude exceeds a predetermined threshold, determining that the howling is generated by the product 30 under test. The predetermined threshold may be obtained through multiple experiments, for example, 10 groups of good products of the tested product are measured by the howling test system, and 10 groups of components of 100Hz, 1KHz and 1KHz are taken to obtain the maximum value of each component, which is the predetermined threshold of each component. Accordingly, the howling detector 130 may separate components of 100Hz, 1KHz, and 1KHz from the sound signal, and compare the components with predetermined thresholds of 100Hz, 1KHz, and 1KHz, respectively, where any one of the components is greater than the predetermined threshold and is determined as having howling, or the three components are greater than respective predetermined thresholds and are determined as having howling.
The second sound signal obtained by the sound pickup nozzle 120 includes pink noise received by the bluetooth headset 30 from the player 20 and sound picked up by the microphone channel 31, and the sound signal picked up by the microphone channel 31 is a sound signal obtained by superimposing specific sound on pink noise leaked from the bluetooth headset, so that the problem of leakage from the bluetooth headset is amplified, and the howling problem of the bluetooth headset can be detected by the howling detector 130 more sensitively and accurately.
In the embodiment, the specific sound is played to the sound pickup channel of the tested product through the playing device, and the specific sound and the first sound signal output by the audio frequency of the tested product are in the same phase and the same frequency, so that the sound pickup channel of the tested product picks up the sound signal with the increased amplitude obtained by overlapping the specific sound and the first sound signal, the leakage problem of the tested product is amplified, and the howling detector can detect the howling problem of the Bluetooth headset more sensitively and more accurately.
Preferably, the howling test system includes a first closed box 140 in which the playing device 110 is disposed, and the sound-collecting channel 31 side of the tested product 30 is embedded in the box to prevent external environmental sounds from entering the sound-collecting channel, thereby shielding the external environmental sounds from affecting the howling test. It will be appreciated that other means may be used to prevent sounds from the external environment from entering the sound-collecting channel 31, such as inputting sounds from the playing device to the sound-collecting channel through a sealed duct.
Preferably, the squeal test system may further include a second closed case 150 in which the pickup nozzle 120 is disposed, and the horn 32 side of the product 30 to be tested is inserted into the case to prevent external environmental sounds from entering the pickup nozzle 120, thereby shielding the external environmental sounds from affecting the squeal test. It will be appreciated that other means of preventing ambient sound from entering the pickup nozzle 120 may be used, such as inputting sound from the horn of the product 30 being tested to the pickup nozzle 120 through a sealed conduit.
Example two
Referring to fig. 2, fig. 2 is a schematic structural diagram of a howling test system according to another embodiment of the present invention. As shown in fig. 2, the howling test system includes a playing device 210, a pickup nozzle 220, a howling detector 230, a first enclosing box 240, and a second enclosing box 250.
The differences between the present embodiment and the first embodiment include:
in this embodiment, the sound pickup nozzle 220 is further configured to obtain a first sound signal of the audio output of the product 30 to be tested before the playing device 210 plays the specific sound to the sound pickup channel 31 of the product 30 to be tested; the playing device 210 is specifically a speaker connected to the sound pickup nozzle 220, and is configured to convert the first sound signal acquired by the sound pickup nozzle 220 into sound and play the sound to a sound pickup channel of the product to be tested. For example, during the howling test, the bluetooth player 20 is provided to perform bluetooth audio connection with the bluetooth headset 30 and play pink noise, so that the bluetooth headset 30 outputs pink noise; pickup nozzle 220 picks up pink noise from the audio output of the bluetooth headset and sends the pink noise signal to horn 210, which horn 210 converts to sound and plays to pickup channel 31 of bluetooth headset 30.
In this embodiment, since the specific sound played by the playing device is derived from the first sound signal acquired by the pickup nozzle from the audio output of the product to be tested, the specific sound is naturally in phase and frequency with the first sound signal output by the audio output of the product to be tested, and thus the playing device only needs one loudspeaker, thereby saving the cost.
EXAMPLE III
Referring to fig. 3, fig. 3 is a schematic structural diagram of a howling test system according to another embodiment of the present invention. As shown in fig. 3, the howling test system includes a playing device 310, a pickup nozzle 320, a howling detector 330, a first enclosing box 340, and a second enclosing box 350.
The differences between the present embodiment and the second embodiment include:
in this embodiment, the howling test system further includes an amplifier 360, configured to amplify the sound signal by a preset multiple before the speaker 320 converts the acquired first sound into sound and plays the sound to the sound pickup channel 31 of the product 30 to be tested, so as to cancel attenuation of the sound signal during transmission. More preferably, by setting the preset multiple, the amplified sound signal can be made to have the same amplitude as the first sound signal of the audio output of the product under test, so that the first sound signal of the audio output of the product under test is played to the sound pickup channel 31 as it is.
For example, during the howling test, the bluetooth player 20 is provided to perform bluetooth audio connection with the bluetooth headset 30 and play pink noise, so that the bluetooth headset 30 outputs pink noise; pickup nozzle 320 picks up pink noise from the audio output of bluetooth headset and sends the pink noise signal to amplifier 360, amplifier 360 sends the pink noise signal to loudspeaker 310 after amplifying by preset times, loudspeaker 310 plays the pink noise signal after amplifying to pickup channel 31 of product 30 under test.
Correspondingly, an embodiment of the present invention further provides a howling test apparatus, including: the playing device is used for playing specific sound to a sound pickup channel of a tested product, and the specific sound and a first sound signal output by the audio frequency of the tested product have the same phase and the same frequency; and the sound pickup nozzle is used for acquiring a second sound signal of the audio output of the tested product after the playing device plays the sound, and outputting the sound signal to the howling detector.
Example four
Correspondingly, the embodiment of the invention also provides a howling test method. Referring to fig. 4, fig. 4 is a flowchart illustrating an embodiment of a howling test method according to the present invention. As shown in fig. 4, the present embodiment includes:
referring to the above embodiments, the execution subject of step 401 may be a device with an audio playing function, such as a mobile phone, an iPad, or a speaker. The tested product can be a Bluetooth mobile phone with a sound pickup channel (a microphone channel) or other equipment with the sound pickup channel. For convenience of understanding, the tested product is exemplified as a bluetooth headset in this embodiment.
During howling test, a player is provided to connect with the bluetooth headset and play sound, for example, the bluetooth player is provided to connect with the bluetooth headset for bluetooth audio and play pink noise, so that the bluetooth headset outputs a first sound signal, i.e. pink noise. Because of structural design or manufacturing process control issues, the microphone channel of a bluetooth headset can pick up pink noise that leaks out of the speaker of the bluetooth headset. In the embodiment, the specific sound is played to the microphone channel by the playing device, the specific sound and the leaked pink noise have the same phase and the same frequency, and the specific sound and the leaked pink noise are superposed to obtain the sound signal with the increased amplitude, so that the sound signal with the increased amplitude is picked up by the microphone channel.
the execution subject of step 402 may be a pickup nozzle, such as a microphone device, disposed at an audio output of the product under test. The second sound signal of the audio output of bluetooth headset that the pickup mouth acquireed includes: the pink noise received by the Bluetooth headset from the player and the sound picked up by the microphone channel of the Bluetooth headset are the sound signals obtained by superposing the specific sound and the leaked pink noise.
And step 403, if the amplitude of the acquired second sound signal exceeds a preset threshold value, determining that the measured product generates howling.
The execution subject of step 403 may be a howling detector. The predetermined threshold may be obtained through multiple experiments, for example, 10 groups of good products of the tested product are measured by the howling test system, and 10 groups of components of 100Hz, 1KHz and 1KHz are taken to obtain the maximum value of each component, which is the predetermined threshold of each component. Accordingly, the howling detector may separate components of 100Hz, 1KHz, and 1KHz from the sound signal, and compare the components with predetermined thresholds of 100Hz, 1KHz, and 1KHz, respectively, where any one of the components is greater than the predetermined threshold and is determined as having howling, or the three components are greater than respective predetermined thresholds and are determined as having howling.
In this embodiment, by playing the specific sound to the sound pickup channel of the product to be tested, since the specific sound and the first sound signal output by the audio frequency of the product to be tested are in the same phase and the same frequency, the sound pickup channel of the product to be tested picks up the sound signal with the increased amplitude obtained by superimposing the specific sound and the first sound signal, thereby amplifying the leakage problem of the product to be tested. By detecting whether the amplitude of the second sound signal of the audio output of the tested product exceeds a preset threshold value or not, the second sound signal of the audio output of the tested product comprises the sound signal picked up by the sound pick-up channel, and the amplitude of the picked-up sound signal is increased, so that the howling problem caused by leakage of the Bluetooth headset can be detected more sensitively and more accurately.
EXAMPLE five
Referring to fig. 5, fig. 5 is a flowchart illustrating a howling test method according to another embodiment of the present invention. As shown in fig. 5, the present embodiment includes:
the execution bodies of the steps 501 and 503 can be the same pickup nozzle.
the execution body of step 502 may be a horn connected to the pickup nozzle 220.
For example, during the howling test, a bluetooth player is provided to perform bluetooth audio connection with a product to be tested (a bluetooth headset) and play pink noise, so that the bluetooth headset outputs pink noise; step 501, specifically, a pickup nozzle picks up pink noise from an audio output of a Bluetooth headset and sends a pink noise signal to a loudspeaker; step 502 is embodied as the speaker converting the pink noise signal into sound and playing it to the pickup channel of the bluetooth headset.
step 503 refers to the description of step 402.
And step 504, if the amplitude of the acquired second sound signal exceeds a preset threshold value, determining that the tested product generates howling.
Step 504 refers to the description of step 403.
In this embodiment, since the played specific sound is derived from the acquired first sound signal output by the audio frequency of the product to be tested, the specific sound is naturally in phase and frequency with the first sound signal output by the audio frequency of the product to be tested, and thus the playing device only needs one loudspeaker, thereby saving the cost.
EXAMPLE six
Referring to fig. 6, fig. 6 is a flowchart illustrating a howling test method according to another embodiment of the present invention. As shown in fig. 6, the present embodiment includes:
step 601 refers to the description of step 501.
the execution subject of step 602 may be an amplifier, which is configured to amplify the first sound signal obtained in step 601 by a preset multiple before step 603, so as to cancel the attenuation of the sound signal during transmission. More preferably, the preset multiple is set so that the amplified sound signal has the same amplitude as the first sound signal of the audio output of the product to be tested, so that the first sound signal of the audio output of the product to be tested is played to the sound pickup channel of the product to be tested as it is.
step 603 refers to the description of step 502.
step 604 refers to the description of step 402.
Step 605 refers to the description of step 403.
Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above detailed description illustrates, but does not limit, the invention and those skilled in the art will be able to design many alternative embodiments within the scope of the appended claims. Those skilled in the art will recognize that appropriate adjustments, modifications, etc. can be made to the specific implementations without departing from the scope of the invention as defined by the appended claims. It is therefore contemplated that the foregoing and other modifications and variations will fall within the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A howling test method is characterized in that the howling test method is used for a howling test system, the howling test system is used for detecting a Bluetooth headset, and the method comprises the following steps:
playing a specific sound to a pickup channel of the Bluetooth headset, wherein the specific sound and a first sound signal output by the audio frequency of the Bluetooth headset have the same phase and frequency;
acquiring a second sound signal output by the audio frequency of the Bluetooth headset, wherein the second sound signal is a sound with a larger amplitude output by the Bluetooth headset after the first sound signal is superposed with the specific sound;
and if the amplitude of the acquired second sound signal exceeds a preset threshold, judging that howling is generated due to leakage of the Bluetooth headset, wherein the preset threshold is a preset threshold of the amplitudes of a plurality of frequency components, and the amplitude of any one frequency component is larger than the corresponding preset threshold, judging that the howling is generated, or judging that the howling is generated only if the amplitudes of the plurality of frequency components are larger than the respective preset thresholds.
2. The howling test method as claimed in claim 1, wherein said playing the specific sound to the pickup channel of the bluetooth headset comprises: acquiring a first sound signal output by the audio frequency of the Bluetooth headset;
the sound pickup channel for playing the specific sound to the Bluetooth headset specifically comprises: and converting the acquired first sound signal into sound and playing the sound for the pickup channel of the Bluetooth headset.
3. The howling test method as claimed in claim 2, wherein before converting the acquired first sound signal into sound and playing the sound to the sound pickup channel of the bluetooth headset, the method further comprises:
and amplifying the acquired first sound signal by preset times.
4. The howling test method as claimed in claim 3, wherein said amplifying the obtained first sound signal by a preset multiple specifically comprises:
and amplifying the acquired first sound signal by preset times so that the amplitude of the amplified sound signal is the same as that of the first sound signal output by the audio frequency of the Bluetooth headset.
5. The howling test method according to any one of claims 1 to 4, characterized in that the specific sound is pink noise.
6. A howling test system, which is used for detecting a Bluetooth headset, comprises:
the playing device is used for playing specific sound to a pickup channel of the Bluetooth headset, and the specific sound and a first sound signal output by the audio frequency of the Bluetooth headset have the same phase and the same frequency;
the sound pickup nozzle is used for acquiring a second sound signal output by the audio frequency of the Bluetooth headset after the playing device plays, and the second sound signal is the sound with the increased amplitude output after the first sound signal and the specific sound are overlapped by the Bluetooth headset;
and a howling detector configured to detect an amplitude of a second sound signal acquired by the sound pickup nozzle, and determine that howling is generated due to leakage of the bluetooth headset if the amplitude exceeds a predetermined threshold, where the predetermined threshold is a predetermined threshold of amplitudes of a plurality of frequency components, and it is determined that howling is generated if any one of the frequency components is greater than the corresponding predetermined threshold, or it is determined that howling is generated if the amplitudes of the plurality of frequency components are greater than respective predetermined thresholds.
7. The howling test system of claim 6, wherein:
the sound pickup nozzle is also used for acquiring a first sound signal output by the audio frequency of the Bluetooth headset before the playing device plays the specific sound to the sound pickup channel of the Bluetooth headset;
the play device comprises a loudspeaker, and the loudspeaker is used for converting a first sound signal acquired by the pickup nozzle into sound and playing the sound for the pickup channel of the Bluetooth headset.
8. The howling test system of claim 7, further comprising:
and the amplifier is used for amplifying the first sound signal by preset times before the loudspeaker converts the acquired first sound signal into sound and plays the sound to the sound pickup channel of the Bluetooth headset.
9. The howling test system of claim 8, wherein the amplifier is configured to amplify the first sound signal by a preset multiple, so that the amplified sound signal has the same amplitude as the sound signal of the audio output of the bluetooth headset.
10. The howling test system according to any one of claims 6 to 9, further comprising a first closed box, wherein the playing device is disposed in the box, and the pickup channel side of the bluetooth headset is embedded in the box.
11. The squeal testing system of any one of claims 6-9 further comprising a second closed box in which the pickup nozzle is disposed, the horn side of the bluetooth headset being embedded in the box.
12. A squeal test device, wherein the squeal test device is used for detecting a Bluetooth headset, comprising:
the playing device is used for playing specific sound to a pickup channel of the Bluetooth headset, and the specific sound and a first sound signal output by the audio frequency of the Bluetooth headset have the same phase and the same frequency;
the sound pickup nozzle is used for acquiring a second sound signal output by the audio frequency of the Bluetooth headset after the playing device plays the sound, and outputting the second sound signal to the howling detector, wherein the second sound signal is the sound with the larger amplitude output by the Bluetooth headset after the first sound signal and the specific sound are superposed;
and a howling detector configured to detect an amplitude of a second sound signal acquired by the sound pickup nozzle, and determine that howling is generated due to leakage of the bluetooth headset if the amplitude exceeds a predetermined threshold, where the predetermined threshold is a predetermined threshold of amplitudes of a plurality of frequency components, and it is determined that howling is generated if any one of the frequency components is greater than the corresponding predetermined threshold, or it is determined that howling is generated if the amplitudes of the plurality of frequency components are greater than respective predetermined thresholds.
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| CN111464930B (en) * | 2020-05-12 | 2022-02-25 | 歌尔智能科技有限公司 | Howling detection method and device for earphone and storage medium |
| CN111988721A (en) * | 2020-08-28 | 2020-11-24 | 锐捷网络股份有限公司 | Sound amplification method, device, system, medium and equipment |
| CN113596665A (en) * | 2021-07-29 | 2021-11-02 | 北京小米移动软件有限公司 | Howling suppression method, howling suppression device, earphone and storage medium |
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| JP4681163B2 (en) * | 2001-07-16 | 2011-05-11 | パナソニック株式会社 | Howling detection and suppression device, acoustic device including the same, and howling detection and suppression method |
| JP5278219B2 (en) * | 2009-07-17 | 2013-09-04 | ヤマハ株式会社 | Howling canceller |
| GB201601453D0 (en) * | 2016-01-26 | 2016-03-09 | Soundchip Sa | Method and apparatus for testing earphone apparatus |
| US9843872B2 (en) * | 2016-05-04 | 2017-12-12 | Unlimiter Mfa Co., Ltd. | Sound collection equipment and method for detecting the operation status of sound collection equipment |
| CN106558316A (en) * | 2016-11-09 | 2017-04-05 | 天津大学 | It is a kind of based on it is long when signal special frequency band rate of change detection method of uttering long and high-pitched sounds |
| CN108093356B (en) * | 2016-11-23 | 2020-10-23 | 杭州萤石网络有限公司 | Howling detection method and device |
| CN107360530B (en) * | 2017-07-03 | 2020-12-01 | 苏州科达科技股份有限公司 | Echo cancellation testing method and device |
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