WO2022048334A1 - Appareil et procédé de test, écouteurs et support d'enregistrement lisible - Google Patents

Appareil et procédé de test, écouteurs et support d'enregistrement lisible Download PDF

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Publication number
WO2022048334A1
WO2022048334A1 PCT/CN2021/107272 CN2021107272W WO2022048334A1 WO 2022048334 A1 WO2022048334 A1 WO 2022048334A1 CN 2021107272 W CN2021107272 W CN 2021107272W WO 2022048334 A1 WO2022048334 A1 WO 2022048334A1
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WO
WIPO (PCT)
Prior art keywords
transfer function
spectrum information
cross
earphone
correlation
Prior art date
Application number
PCT/CN2021/107272
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English (en)
Chinese (zh)
Inventor
练添富
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Oppo广东移动通信有限公司
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2022048334A1 publication Critical patent/WO2022048334A1/fr

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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
    • 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
    • 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

Definitions

  • the traditional detection method cannot accurately detect the attenuation of the sound signal played by the earphone.
  • Various embodiments of the present application provide a detection method, an apparatus, an earphone, and a computer-readable storage medium.
  • preprocessed reference spectrum information where the reference spectrum information is used to indicate the spectrum information of the detected audio in a standard wearing state
  • a detection device applied to earphones, includes:
  • the playback module is used to play the detected audio
  • an acquisition module configured to acquire the detection sound signal corresponding to the detection audio
  • a first spectrum information acquisition module configured to process the detected sound signal to obtain first spectrum information
  • a reference spectrum information acquisition module configured to acquire preprocessed reference spectrum information, where the reference spectrum information is used to indicate the spectrum information of the detected audio in a standard wearing state;
  • An earphone includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the operations of the above-mentioned detection method.
  • the above-mentioned detection method, device, earphone and computer-readable storage medium collect the detection sound signal corresponding to the played detection audio, process the detection sound signal to obtain first spectrum information, and then determine the first spectrum information and preprocessed reference spectrum information
  • a light sensor for detection, and the interference of external factors such as light can be avoided, so that the attenuation of the detected sound signal can be accurately detected; no redundant hardware is required in the headset.
  • a light sensor can save hardware costs; no need to perform fast Fourier transform, it can avoid the fence effect caused by fast Fourier transform of the detected audio, and more accurately detect the attenuation of the detected audio played by the headphones.
  • FIG. 2 is a flowchart of a detection method in one embodiment.
  • FIG. 3 is a schematic diagram of silicone earplugs of different sizes in one embodiment.
  • FIG. 4 is a schematic diagram of the principle of active noise reduction of headphones in an embodiment.
  • FIG. 8 is a schematic diagram of second spectral information of the reference transfer function in one embodiment.
  • FIG. 10 is a schematic diagram of the relationship between the cross-correlation function and the preset cross-correlation threshold in one embodiment.
  • FIG. 11 is a schematic diagram of the amount of noise reduction of earphones with different wearing degrees of fit in one embodiment.
  • FIG. 12 is a flowchart of a detection method in another embodiment.
  • FIG. 13 is a structural block diagram of a detection apparatus in an embodiment.
  • FIG. 14 is a schematic diagram of the internal structure of an earphone in one embodiment.
  • first, second, etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element.
  • first spectral information may be referred to as second spectral information
  • second spectral information may be referred to as first spectral information, without departing from the scope of this application.
  • Both the first spectrum information and the second spectrum information are spectrum information, but they are not the same spectrum information.
  • the earphone 102 plays the detection audio; collects the detection sound signal corresponding to the detection audio; processes the detection sound signal to obtain first spectrum information; obtains preprocessed reference spectrum information, and the reference spectrum information is used to indicate the detection audio in the standard wearing state Determine the cross-correlation function between the first spectrum information and the reference spectrum information; obtain a cross-correlation result according to the cross-correlation function, and the cross-correlation result is used to indicate the attenuation of the detected sound signal.
  • the headset can also send the cross-correlation result to the terminal 104 .
  • the earphone 102 may be a headphone, an on-ear earphone, an in-ear earphone, etc., which is not limited thereto.
  • the terminal 104 may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices.
  • the earphone is an in-ear noise-cancelling earphone with an ear cap structure that fits the ear canal, and the detection sound signal is collected in the ear canal by a feedback microphone; or, the earphone is a head-worn noise-cancelling earphone with an earmuff structure covering the auricle. , the detection sound signal is collected by the feedback microphone in the earmuff.
  • Headphones may include Active Noise Cancellation (Active Noise Cancellation), or passive noise cancellation.
  • the headset with active noise reduction function may include a feedforward microphone, a feedback microphone, a speaker (speaker), earplugs, a cavity, a DSP (Digital Signal Process, digital signal processor) and other devices.
  • FIG. 4 is a schematic diagram of the principle of active noise reduction of headphones in an embodiment. Active noise reduction headphones monitor the external noise outside the headphones through the feedforward microphone, and monitor the residual noise inside the headphones through the feedback microphone. After DSP processing, the inverse noise is generated and played by the speaker (speaker), so as to achieve the purpose of eliminating noise.
  • FIG. 5 is a circuit block diagram of an earphone in one embodiment.
  • the headset may include speakers, microphone devices (feedforward microphones, feedback microphones), audio signal processing chip circuits (analog-to-digital conversion modules, DSP modules), storage circuits, power supply circuits, and the like.
  • the speaker is used to play ANC (Active Noise Cancellation) inverse noise, music signal, detection audio, etc.
  • the feedforward microphone is installed outside the earphone to monitor the external noise of the earphone
  • the feedback microphone is installed inside the earphone to use
  • DSP module can include ANC algorithm, earphone fit detection algorithm, etc.
  • audio signal processing chip circuit is used to run ANC algorithm And the earphone fit detection algorithm
  • the storage circuit is used to store the audio source PCM (Pulse Code Modulation) audio data for the fit detection
  • the power supply circuit can supply power to other hardware components, and the power supply source is the built-in battery of the earphone.
  • FIG. 6 is a schematic diagram of detecting spectral information of audio in one embodiment. It can be seen from Figure 6 that when the fit of the earphone is low, the low-frequency sound signal of the detected audio is attenuated greatly, so the frequency band of the detected audio can be set to be in the low-frequency range, that is, the preset frequency range is not in the low-frequency range, and the spectral energy of the detected audio is distributed in the range. Within the preset frequency band, it is easier to detect whether the spectral energy of the detected audio is attenuated, so that the fit of the headset can be more accurately judged.
  • a detection sound signal corresponding to the detection audio is collected.
  • Spectrum refers to the frequency spectral density, which is the distribution curve of frequencies.
  • the first spectral information refers to the frequency spectral density of the detected sound signal.
  • the reference spectrum information may be obtained through a preprocessing operation and stored in the headset in advance, or the reference spectrum information may be stored in a terminal device communicatively connected to the headset.
  • the reference spectrum information can be pre-stored in the memory of the headset, and the reference spectrum information can be read from the memory during detection; the reference spectrum information can also be stored in the terminal device connected to the headset, when the headset detects, from the terminal The reference spectrum information is obtained from the device.
  • a cross-correlation result is obtained according to the cross-correlation function, and the cross-correlation result is used to indicate the attenuation of the detected sound signal.
  • the cross-correlation result can be expressed as a percentage, such as 80%, 50%, 30%, etc., the larger the percentage of the cross-correlation result, the smaller the attenuation of the detected sound signal.
  • the cross-correlation result can also be expressed as an amplitude value, and the value obtained by the cross-correlation function is calculated by logarithm, converted into an amplitude value, and the amplitude value is used as the cross-correlation result.
  • the second preset frequency point refers to a preset frequency point.
  • the Q second preset frequency points can be selected as required.
  • the weight of the cross-correlation coefficient corresponding to each frequency point can be set as required.
  • the preset weight refers to the preset weight value.
  • the detection sound signal corresponding to the played detection audio is collected, the detection sound signal is processed to obtain the first spectrum information, and the cross-correlation function between the first spectrum information and the preprocessed reference spectrum information is determined, so as to obtain the cross-correlation function.
  • a light sensor for detection which can avoid the interference of external factors such as light, so that the attenuation of the detected sound signal can be accurately detected
  • redundant hardware such as a light sensor in the headset, which can save hardware costs
  • fast Fourier transform which can avoid the fence effect caused by fast Fourier transform of the detection audio, and more accurately detect the attenuation of the detection audio played by the headphones
  • a reference transfer function is obtained, and accurate reference spectrum information can be obtained by filtering the detected audio according to the reference transfer function.
  • the detected audio is filtered according to the reference transfer function to obtain reference spectrum information, including:
  • the earphone After acquiring the second spectrum information of the reference transfer function and the third spectrum information of the detection audio, the earphone multiplies the second spectrum information of the reference transfer function and the third spectrum information of the detection audio to obtain the reference spectrum information.
  • the reference spectrum information may be used for cross-correlation calculation with the first spectrum information to obtain a cross-correlation function.
  • obtaining the reference transfer function includes: in the real person wearing test, obtaining N test transfer functions of the standard prototype, where N is an integer greater than 1; and averaging the N test transfer functions to obtain the reference transfer function.
  • the difference obtained by subtracting the first mean from the second mean is positive, or the difference obtained by subtracting the second mean from the first mean is negative, indicating that the first amplitude of the first preset frequency in the actual transfer function is smaller , deviates from the second amplitude value of the first preset frequency point in the reference transfer function, then the actual transfer function is added to the difference to obtain the adjusted actual transfer function.
  • the adjusted actual transfer function also corrects the actual transfer function. gain of the function.

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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)
  • Headphones And Earphones (AREA)

Abstract

Procédé de test, comprenant les étapes consistant à : lire un signal audio de test (202) ; acquérir un signal sonore de test correspondant à l'audio de test (204) ; traiter le signal sonore de test pour obtenir des premières informations de spectre de fréquence (206) ; obtenir des informations de spectre de fréquence de référence prétraitées, les informations de spectre de fréquence de référence étant utilisées pour indiquer des informations de spectre de fréquence de l'audio de test selon un état d'usure standard (208) ; déterminer une fonction de corrélation croisée entre les premières informations de spectre de fréquences et les informations de spectre de fréquences de référence (210) ; et obtenir un résultat de corrélation croisée en fonction de la fonction de corrélation croisée, le résultat de corrélation croisée étant utilisé pour indiquer une situation d'atténuation du signal sonore de test (212).
PCT/CN2021/107272 2020-09-03 2021-07-20 Appareil et procédé de test, écouteurs et support d'enregistrement lisible WO2022048334A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010914756.2 2020-09-03
CN202010914756.2A CN114143646B (zh) 2020-09-03 2020-09-03 检测方法、装置、耳机和可读存储介质

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CN116744169A (zh) * 2022-09-30 2023-09-12 荣耀终端有限公司 耳机设备、声音信号的处理方法及佩戴贴合度测试方法
CN117672255A (zh) * 2023-12-21 2024-03-08 北京谛声科技有限责任公司 基于人工智能和设备运行声音的异常设备识别方法及系统
CN117714939A (zh) * 2024-02-05 2024-03-15 九音科技(南京)有限公司 基于频谱分析的入耳检测方法及系统

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CN114710726B (zh) * 2022-03-31 2024-04-30 歌尔股份有限公司 智能穿戴设备的中心定位方法、设备及存储介质
CN117440307B (zh) * 2023-12-20 2024-03-22 深圳市昂思科技有限公司 一种智能耳机检测方法及系统

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CN117672255A (zh) * 2023-12-21 2024-03-08 北京谛声科技有限责任公司 基于人工智能和设备运行声音的异常设备识别方法及系统
CN117672255B (zh) * 2023-12-21 2024-05-14 北京谛声科技有限责任公司 基于人工智能和设备运行声音的异常设备识别方法及系统
CN117714939A (zh) * 2024-02-05 2024-03-15 九音科技(南京)有限公司 基于频谱分析的入耳检测方法及系统
CN117714939B (zh) * 2024-02-05 2024-05-24 九音科技(南京)有限公司 基于频谱分析的入耳检测方法及系统

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