CN109379689A - Loudspeaker total harmonic distortion measurement method, device, storage medium and measurement system - Google Patents
Loudspeaker total harmonic distortion measurement method, device, storage medium and measurement system Download PDFInfo
- Publication number
- CN109379689A CN109379689A CN201811273559.6A CN201811273559A CN109379689A CN 109379689 A CN109379689 A CN 109379689A CN 201811273559 A CN201811273559 A CN 201811273559A CN 109379689 A CN109379689 A CN 109379689A
- Authority
- CN
- China
- Prior art keywords
- audio signal
- harmonic distortion
- speaker
- loudspeaker
- total harmonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 29
- 238000000691 measurement method Methods 0.000 title description 4
- 230000005236 sound signal Effects 0.000 claims abstract description 175
- 238000000034 method Methods 0.000 claims abstract description 38
- 230000004044 response Effects 0.000 claims description 38
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/27—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the analysis technique
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Mathematical Optimization (AREA)
- General Engineering & Computer Science (AREA)
- Software Systems (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Databases & Information Systems (AREA)
- Algebra (AREA)
- Computational Linguistics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
本申请实施例公开了扬声器总谐波失真测量方法、装置、存储介质及测量系统。该方法包括：获取驱动所述扬声器发声的第一音频信号；获取外置麦克风基于所述扬声器发声采集的第二音频信号；根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。通过本申请实施例提供的技术方案，可以快速、精确地测量出扬声器的总谐波失真，尤其是针对移动终端上的扬声器的总谐波失真的测量。
The embodiments of the present application disclose a method, device, storage medium and measurement system for measuring the total harmonic distortion of a speaker. The method includes: obtaining a first audio signal that drives the speaker to make a sound; obtaining a second audio signal collected by an external microphone based on the sound of the speaker; and calculating the total harmonic distortion of the speaker according to the first audio signal and the second audio signal. Through the technical solution provided in the embodiments of the present application, the total harmonic distortion of the speaker can be measured quickly and accurately, especially for the measurement of the total harmonic distortion of the speaker on a mobile terminal.
Description
技术领域technical field
本申请实施例涉及音频谐波失真测量的技术领域，尤其涉及扬声器总谐波失真测量方法、装置、存储介质及测量系统。The embodiments of the present application relate to the technical field of audio harmonic distortion measurement, and in particular, to a method, device, storage medium, and measurement system for measuring total harmonic distortion of speakers.
背景技术Background technique
随着移动终端的多媒体技术的快速发展，人们习惯于在移动终端上听音乐和看视频，而扬声器品质的好坏，直接决定了移动终端外放音频的品质高低，因此，对于移动终端上扬声器的指标，尤其是总谐波失真(Total Harmonic Distortion，THD)的测量也就变得至关重要。With the rapid development of multimedia technology in mobile terminals, people are accustomed to listening to music and watching videos on mobile terminals, and the quality of the speakers directly determines the quality of the audio played by the mobile terminals. indicators, especially the measurement of total harmonic distortion (Total Harmonic Distortion, THD) has become very important.
发明内容SUMMARY OF THE INVENTION
本申请实施例提供扬声器总谐波失真测量方法、装置、存储介质及测量系统，可以简单、准确地测量扬声器的总谐波失真。Embodiments of the present application provide a method, device, storage medium, and measurement system for total harmonic distortion of a speaker, which can simply and accurately measure the total harmonic distortion of a speaker.
第一方面，本申请实施例提供了一种扬声器总谐波失真测量方法，包括：In a first aspect, an embodiment of the present application provides a method for measuring total harmonic distortion of a speaker, including:
获取驱动所述扬声器发声的第一音频信号；obtaining a first audio signal that drives the speaker to sound;
获取外置麦克风基于所述扬声器发声采集的第二音频信号；acquiring the second audio signal collected by the external microphone based on the sound of the speaker;
根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。The total harmonic distortion of the speaker is calculated from the first audio signal and the second audio signal.
第二方面，本申请实施例提供了一种扬声器总谐波失真测量装置，包括：In a second aspect, an embodiment of the present application provides a device for measuring total harmonic distortion of a loudspeaker, including:
第一音频信号获取模块，用于获取驱动所述扬声器发声的第一音频信号；a first audio signal acquisition module, configured to acquire a first audio signal that drives the speaker to sound;
第二音频信号获取模块，用于获取外置麦克风基于所述扬声器发声采集的第二音频信号；A second audio signal acquisition module, configured to acquire the second audio signal collected by the external microphone based on the sound of the speaker;
总谐波失真计算模块，用于根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。A total harmonic distortion calculation module, configured to calculate the total harmonic distortion of the speaker according to the first audio signal and the second audio signal.
第三方面，本申请实施例提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如本申请实施例第一方面所述的扬声器总谐波失真测量方法。In a third aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the total harmonic distortion measurement of a speaker according to the first aspect of the embodiment of the present application method.
第四方面，本申请实施例提供了一种测量系统，包括外置麦克风，存储器，处理器及存储在存储器上并可在处理器运行的计算机程序，所述处理器执行所述计算机程序时实现如本申请实施例第一方面所述的扬声器总谐波失真测量方法。In a fourth aspect, an embodiment of the present application provides a measurement system, which includes an external microphone, a memory, a processor, and a computer program stored in the memory and executed by the processor, which is implemented when the processor executes the computer program. The method for measuring the total harmonic distortion of a loudspeaker according to the first aspect of the embodiments of the present application.
本申请实施例中提供的扬声器总谐波失真测量方案，获取驱动所述扬声器发声的第一音频信号；获取外置麦克风基于所述扬声器发声采集的第二音频信号；根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。通过采用上述技术方案，可以快速、精确地测量出扬声器的总谐波失真，尤其是针对移动终端上的扬声器的总谐波失真的测量。The total harmonic distortion measurement solution of the speaker provided in the embodiment of the present application acquires the first audio signal that drives the speaker to sound; acquires the second audio signal collected by the external microphone based on the sound of the speaker; according to the first audio signal and the second audio signal to calculate the total harmonic distortion of the speaker. By adopting the above technical solution, the total harmonic distortion of the loudspeaker can be measured quickly and accurately, especially for the measurement of the total harmonic distortion of the loudspeaker on the mobile terminal.
附图说明Description of drawings
图1为本申请实施例提供的一种扬声器总谐波失真测量方法的流程示意图；1 is a schematic flowchart of a method for measuring total harmonic distortion of a loudspeaker according to an embodiment of the present application;
图2为本申请实施例提供的另一种扬声器总谐波失真测量方法的流程示意图；2 is a schematic flowchart of another method for measuring total harmonic distortion of a loudspeaker according to an embodiment of the present application;
图3为本申请实施例提供的生成的音频脉冲序列信号图；3 is a diagram of a generated audio pulse sequence signal provided by an embodiment of the present application;
图4为本申请实施例提供的一种扬声器总谐波失真测量装置的结构示意图；4 is a schematic structural diagram of a device for measuring total harmonic distortion of a loudspeaker according to an embodiment of the application;
图5为本申请实施例提供的一种测量系统的结构示意图。FIG. 5 is a schematic structural diagram of a measurement system provided by an embodiment of the present application.
具体实施方式Detailed ways
下面结合附图并通过具体实施方式来进一步说明本申请的技术方案。可以理解的是，此处所描述的具体实施例仅仅用于解释本申请，而非对本申请的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本申请相关的部分而非全部结构。The technical solutions of the present application will be further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all the structures related to the present application.
在更加详细地讨论示例性实施例之前应当提到的是，一些示例性实施例被描述成作为流程图描绘的处理或方法。虽然流程图将各步骤描述成顺序的处理，但是其中的许多步骤可以被并行地、并发地或者同时实施。此外，各步骤的顺序可以被重新安排。当其操作完成时所述处理可以被终止，但是还可以具有未包括在附图中的附加步骤。所述处理可以对应于方法、函数、规程、子例程、子程序等等。Before discussing the exemplary embodiments in greater detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowchart depicts the steps as a sequential process, many of the steps may be performed in parallel, concurrently, or concurrently. Furthermore, the order of the steps can be rearranged. The process may be terminated when its operation is complete, but may also have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, subroutines, and the like.
由于移动终端整机上的扬声器不可拆卸成，而且移动终端的出货量十分巨大，不太适合使用专业的扬声器的测试设备，例如kl ippel，对大量的所述扬声器单体的总谐波失真进行一一测量。现有技术中，主要通过测量扬声器的电流电压信号，然后根据电流电压信号计算扬声器的总谐波失真，然而该方案测量的扬声器的总谐波失真精度低，尤其不适合移动终端整机上扬声器的总谐波失真的测量。因为移动终端整机上的扬声器是不可拆卸的，如果采用电压电流信号测量法，需要从移动终端上引出导线来测量移动终端上的扬声器的电流电压信号，会由于硬件的改动引起资源的浪费。基于此，现提供如下扬声器总谐波失真的测量方案。Since the speakers on the whole mobile terminal cannot be disassembled, and the shipment volume of the mobile terminal is very large, it is not suitable to use professional speaker testing equipment, such as klippel, for the total harmonic distortion of a large number of the speaker monomers. Take measurements one by one. In the prior art, the total harmonic distortion of the speaker is mainly measured by measuring the current and voltage signals of the speaker, and then the total harmonic distortion of the speaker is calculated according to the current and voltage signals. However, the total harmonic distortion of the speaker measured by this solution is low, especially not suitable for the speaker on the whole mobile terminal. measurement of total harmonic distortion. Because the speaker on the mobile terminal is not detachable, if the voltage and current signal measurement method is used, it is necessary to draw wires from the mobile terminal to measure the current and voltage signals of the speaker on the mobile terminal, which will cause a waste of resources due to hardware changes. Based on this, the measurement scheme of the total harmonic distortion of the loudspeaker is provided as follows.
图1为本申请实施例提供的扬声器总谐波失真测量方法的流程示意图，该方法可以由扬声器总谐波失真测量装置执行，其中该装置可由软件和/或硬件实现，一般可集成在扬声器总谐波失真测量系统中。如图1所示，该方法包括：FIG. 1 is a schematic flowchart of a method for measuring total harmonic distortion of a loudspeaker provided by an embodiment of the present application. The method can be performed by a device for measuring total harmonic distortion of a loudspeaker, wherein the device can be implemented by software and/or hardware, and can generally be integrated in the total harmonic distortion of a loudspeaker. in harmonic distortion measurement systems. As shown in Figure 1, the method includes:
步骤101、获取驱动扬声器发声的第一音频信号。Step 101: Acquire a first audio signal that drives the speaker to sound.
在本申请实施例中，扬声器可以包括终端设备内置的扬声器，还可以包括具有播放音频功能的独立的扬声器，需要说明的是，本申请实施例对扬声器的存在形式不做限定。当扬声器为终端设备内置的扬声器时，终端设备可以包括手机、平板电脑以及笔记本电脑等终端设备。In the embodiment of the present application, the speaker may include a built-in speaker in the terminal device, or may include an independent speaker with a function of playing audio. It should be noted that the embodiment of the present application does not limit the existence of the speaker. When the speaker is a built-in speaker of the terminal device, the terminal device may include terminal devices such as a mobile phone, a tablet computer, and a notebook computer.
示例性的，获取驱动扬声器发声的第一音频信号，也即所述扬声器预播放的第一音频信号。其中，第一音频信号也可以理解为输入扬声器的音频测试信号。Exemplarily, the first audio signal that drives the speaker to sound, that is, the first audio signal pre-played by the speaker is obtained. The first audio signal may also be understood as an audio test signal input to the speaker.
步骤102、获取外置麦克风基于所述扬声器发声采集的第二音频信号。Step 102: Acquire a second audio signal collected by the external microphone based on the sound produced by the speaker.
在本申请实施例中，外置麦克风可以理解为与扬声器独立设置的音频采集设备。示例性的，当扬声器为移动终端上的扬声器时，所述外置麦克风可以理解为移动终端的外置麦克风，也即与移动终端独立设置的麦克风，而非移动终端内置的麦克风。In the embodiment of the present application, the external microphone may be understood as an audio collection device provided independently from the speaker. Exemplarily, when the speaker is a speaker on a mobile terminal, the external microphone may be understood as an external microphone of the mobile terminal, that is, a microphone provided independently from the mobile terminal, rather than a built-in microphone of the mobile terminal.
示例性的，获取外置麦克风基于所述扬声器发声采集的第二音频信号。可以理解的是，第二音频信号包括，将第一音频信号输入至扬声器后，第一音频信号经扬声器播放时，所述外置麦克风采集的音频信号。在本申请实施例中，外置麦克风采集的音频信号与扬声器实际播放出的音频信号间的差异可以忽略不计，因此，第二音频信号可以理解为扬声器实际播放出的音频信号，也即扬声器输出的音频信号。Exemplarily, the second audio signal collected by the external microphone based on the sound produced by the speaker is acquired. It can be understood that the second audio signal includes, after the first audio signal is input to the speaker, the audio signal collected by the external microphone when the first audio signal is played through the speaker. In the embodiment of the present application, the difference between the audio signal collected by the external microphone and the audio signal actually played by the speaker can be ignored. Therefore, the second audio signal can be understood as the audio signal actually played by the speaker, that is, the output of the speaker. audio signal.
步骤103、根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。Step 103: Calculate the total harmonic distortion of the speaker according to the first audio signal and the second audio signal.
在本申请实施例中，扬声器的总谐波失真是指语音信号源(音频信号)输入扬声器时，输出信号比输入信号多出的频外谐波成分。由于第一音频信号为驱动扬声器发声的音频信号，也即输入扬声器的音频信号，第二音频信号为第一音频信号输入至扬声器后，经扬声器输出的音频信号。输入同一音频信号后，由于扬声器品质好坏的不同，输出的第二音频信号不同，对于理想型扬声器而言，输入的第一音频信号与输出的第二音频信号完全相同，而在实际应用中，输入的第一音频信号与输出的第二音频信号不可能完全相同，其中，输入的第一音频信号与输出的第二音频信号差异性越小，表示扬声器的品质越高，反之，输入的第一音频信号与输出的第二音频信号差异性越大，表示扬声器的品质越差。由于总谐波失真是衡量扬声器品质好坏的重要指标，因此，可根据第一音频信号和第二音频信号计算扬声器的总谐波失真。In the embodiment of the present application, the total harmonic distortion of the speaker refers to the out-of-frequency harmonic components of the output signal that are more than the input signal when the voice signal source (audio signal) is input to the speaker. Since the first audio signal is an audio signal that drives the speaker to sound, that is, an audio signal input to the speaker, the second audio signal is an audio signal output through the speaker after the first audio signal is input to the speaker. After the same audio signal is input, the output second audio signal is different due to the difference in speaker quality. For an ideal speaker, the input first audio signal is exactly the same as the output second audio signal, but in practical applications , the input first audio signal and the output second audio signal cannot be exactly the same, wherein, the smaller the difference between the input first audio signal and the output second audio signal, the higher the quality of the speaker, on the contrary, the input The greater the difference between the first audio signal and the outputted second audio signal, the worse the quality of the speaker. Since the total harmonic distortion is an important indicator for measuring the quality of the speaker, the total harmonic distortion of the speaker can be calculated according to the first audio signal and the second audio signal.
可选的，根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真，包括：对所述第一音频信号进行逆滤波处理，生成逆滤波音频信号；对所述逆滤波音频信号与所述第二音频信号进行卷积操作，生成音频脉冲序列信号；根据所述音频脉冲序列信号计算所述扬声器的总谐波失真。可以理解的是，在时域范围内，输入扬声器的第一音频信号与扬声器的非线性函数的卷积等于扬声器输出的第二音频信号(也即外置麦克风采集的第二音频信号)；而在频域范围内，输入频域音频信号与频域上扬声器的非线性系统的非线性函数的乘积等于输出频域音频信号，其中，输入频域音频信号为在频域上与第一音频信号对应的频域音频信号，输出频域音频信号为在频域上与第二音频信号对应的频域音频信号。因此，时域内的卷积就是频域内的乘积。由此可知，对第一音频信号进行逆滤波处理，生成逆滤波音频信号后，将逆滤波音频信号与第二音频信号进行卷积操作，相当于是将第二音频信号与第一音频信号做除法运算，生成的音频脉冲序列信号中包含有扬声器的非线性系统对应的非线性关系。因此，可根据所述音频脉冲序列信号计算扬声器的总谐波失真。Optionally, calculating the total harmonic distortion of the speaker according to the first audio signal and the second audio signal includes: performing inverse filtering processing on the first audio signal to generate an inverse filtering audio signal; performing a convolution operation on the inversely filtered audio signal and the second audio signal to generate an audio pulse sequence signal; and calculating the total harmonic distortion of the speaker according to the audio pulse sequence signal. It can be understood that, in the time domain, the convolution of the first audio signal input to the speaker and the nonlinear function of the speaker is equal to the second audio signal output by the speaker (that is, the second audio signal collected by the external microphone); and In the frequency domain range, the product of the input frequency domain audio signal and the nonlinear function of the nonlinear system of the loudspeaker in the frequency domain is equal to the output frequency domain audio signal, wherein the input frequency domain audio signal is the frequency domain and the first audio signal. For the corresponding frequency domain audio signal, the output frequency domain audio signal is a frequency domain audio signal corresponding to the second audio signal in the frequency domain. Therefore, a convolution in the time domain is a product in the frequency domain. It can be seen from this that performing inverse filtering processing on the first audio signal to generate an inverse filtering audio signal, and performing a convolution operation on the inverse filtering audio signal and the second audio signal is equivalent to dividing the second audio signal and the first audio signal Operation, the generated audio pulse sequence signal contains the nonlinear relationship corresponding to the nonlinear system of the loudspeaker. Therefore, the total harmonic distortion of the loudspeaker can be calculated from the audio pulse train signal.
可选的，根据所述音频脉冲序列信号计算所述扬声器的总谐波失真，包括：根据所述音频脉冲序列信号获取预设数量个谐波脉冲响应；针对所述预设数量个谐波脉冲响应，对每个谐波脉冲响应进行傅里叶变换，得到与所述谐波脉冲响应对应的谐波失真；根据每个谐波失真计算所述扬声器的总谐波失真。示例性的，扬声器的非线性响应可以分解为多个脉冲响应的和，也即，对逆滤波音频信号与第二音频信号进行卷积操作后生成的音频脉冲序列信号中，按照时间的先后顺序，可分解为多个脉冲高度由高到低排列的脉冲信号的和。因此，可从音频脉冲序列信号中截取预设数量个谐波脉冲响应，可选的，为了减少计算总谐波失真的计算工作量，可选取5个谐波脉冲响应。针对预设数量个谐波脉冲响应，对每个谐波脉冲响应进行傅里叶变化，从而可以得到与该谐波脉冲响应对应的谐波失真，然后根据每个谐波失真计算扬声器的总谐波失真。Optionally, calculating the total harmonic distortion of the speaker according to the audio pulse sequence signal includes: acquiring a preset number of harmonic impulse responses according to the audio pulse sequence signal; for the preset number of harmonic pulses In response, Fourier transform is performed on each harmonic impulse response to obtain the harmonic distortion corresponding to the harmonic impulse response; the total harmonic distortion of the speaker is calculated according to each harmonic distortion. Exemplarily, the nonlinear response of the loudspeaker can be decomposed into the sum of multiple impulse responses, that is, in the audio pulse sequence signal generated after the convolution operation is performed on the inversely filtered audio signal and the second audio signal, in the order of time , which can be decomposed into the sum of multiple pulse signals arranged from high to low. Therefore, a preset number of harmonic impulse responses can be intercepted from the audio pulse sequence signal. Optionally, in order to reduce the computational workload of calculating the total harmonic distortion, 5 harmonic impulse responses can be selected. For a preset number of harmonic impulse responses, Fourier transform is performed on each harmonic impulse response, so that the harmonic distortion corresponding to the harmonic impulse response can be obtained, and then the total harmonic of the speaker is calculated according to each harmonic distortion. wave distortion.
可选的，根据每个谐波失真计算所述扬声器的总谐波失真，包括：根据如下公式计算所述扬声器的总谐波失真：Optionally, calculating the total harmonic distortion of the speaker according to each harmonic distortion includes: calculating the total harmonic distortion of the speaker according to the following formula:
其中，THD表示总谐波失真，Hi表示第i个谐波脉冲响应对应的谐波失真，m表示谐波脉冲响应的数量。Among them, THD represents the total harmonic distortion, H i represents the harmonic distortion corresponding to the ith harmonic impulse response, and m represents the number of harmonic impulse responses.
示例性的，当m＝5时，这样在保证扬声器总谐波失真准确定的前提下，可以有效降低计算扬声器的总谐波失真时的计算量。Exemplarily, when m=5, In this way, on the premise of ensuring that the total harmonic distortion of the loudspeaker is accurately determined, the amount of calculation in calculating the total harmonic distortion of the loudspeaker can be effectively reduced.
本申请实施例中提供的扬声器总谐波失真测量方法，获取驱动所述扬声器发声的第一音频信号；获取外置麦克风基于所述扬声器发声采集的第二音频信号；根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。通过采用上述技术方案，可以快速、精确地测量出扬声器的总谐波失真，尤其是针对移动终端上的扬声器的总谐波失真的测量。In the method for measuring total harmonic distortion of a speaker provided in the embodiment of the present application, a first audio signal that drives the speaker to sound; a second audio signal collected by an external microphone based on the sound of the speaker; according to the first audio signal and the second audio signal to calculate the total harmonic distortion of the speaker. By adopting the above technical solution, the total harmonic distortion of the loudspeaker can be measured quickly and accurately, especially for the measurement of the total harmonic distortion of the loudspeaker on the mobile terminal.
图2为本申请实施例提供的扬声器总谐波失真测量方法的流程示意图，如图2所示，该方法包括：FIG. 2 is a schematic flowchart of a method for measuring total harmonic distortion of a loudspeaker provided by an embodiment of the application. As shown in FIG. 2 , the method includes:
步骤201、当所述扬声器和所述外置麦克风处于安静环境时，获取驱动所述扬声器发声的第一音频信号及获取外置麦克风基于所述扬声器发声采集的第二音频信号。Step 201: When the speaker and the external microphone are in a quiet environment, acquire a first audio signal that drives the speaker to sound, and acquire a second audio signal that is collected by an external microphone based on the speaker's sound.
在本申请实施例中，为了避免外界嘈杂环境对计算扬声器的总谐波失真的影响，因此，当扬声器和外置麦克风处于安静环境时，获取驱动扬声器发声的第一音频信号，并获取外置麦克风基于所述扬声器发声采集的第二音频信号。可以理解的是，第一音频信号为扬声器处于安静环境时，驱动扬声器发声的音频信号，第二音频信号为扬声器和外置麦克风处于安静环境时，外置麦克风采集基于扬声器发声采集的音频信号。示例性的，当扬声器和外置麦克风所处环境噪声小于预设噪声阈值时，可表示扬声器和外置麦克风处于安静环境。又示例性的，可同时将扬声器和外置麦克风处于消音箱中，获取驱动扬声器发声的第一音频信号及获取外置麦克风基于所述扬声器发声采集的第二音频信号。可选的，为了使外置麦克基于扬声器发声采集的第二音频信号更加接近于扬声器实际输出的音频信号，可使扬声器与外置麦克风间的距离小于预设距离阈值，如小于10厘米。需要说明的是，当扬声器为移动终端上的扬声器时，可当移动终端和外置麦克风处于安静环境，并且移动终端与外置麦克风间距离小于预设距离阈值时，获取驱动移动终端上的扬声器发声的第一音频信号及获取外置麦克风基于移动终端上的扬声器发声采集的第二音频信号。In the embodiment of the present application, in order to avoid the influence of the external noisy environment on the calculation of the total harmonic distortion of the speaker, when the speaker and the external microphone are in a quiet environment, the first audio signal that drives the speaker to sound is obtained, and the external The microphone utters the collected second audio signal based on the speaker. It can be understood that the first audio signal is an audio signal that drives the speaker to sound when the speaker is in a quiet environment, and the second audio signal is an audio signal collected by the external microphone based on the sound of the speaker when the speaker and the external microphone are in a quiet environment. Exemplarily, when the noise in the environment where the speaker and the external microphone are located is less than the preset noise threshold, it may indicate that the speaker and the external microphone are in a quiet environment. In another example, the speaker and the external microphone may be placed in the anechoic box at the same time, the first audio signal that drives the speaker to sound and the second audio signal collected by the external microphone based on the sound of the speaker is obtained. Optionally, in order to make the second audio signal collected by the external microphone based on the sound of the speaker closer to the audio signal actually output by the speaker, the distance between the speaker and the external microphone can be less than a preset distance threshold, such as less than 10 cm. It should be noted that, when the speaker is the speaker on the mobile terminal, when the mobile terminal and the external microphone are in a quiet environment, and the distance between the mobile terminal and the external microphone is less than the preset distance threshold, the speaker on the mobile terminal can be driven. The sounded first audio signal and the second audio signal collected by the external microphone based on the sound produced by the speaker on the mobile terminal are acquired.
可选的，所述第一音频信号的表达式如下：Optionally, the expression of the first audio signal is as follows:
其中，s(t)表示所述第一音频信号，f1表示所述第一音频信号的起始频点，f2表示所述第一音频信号的截止频点，T表示所述第一音频信号的时长。in, s(t) represents the first audio signal, f 1 represents the starting frequency of the first audio signal, f 2 represents the cut-off frequency of the first audio signal, and T represents the frequency of the first audio signal. duration.
示例性的，输入扬声器的音频测试信号(也即第一音频信号)为s(t)，而扬声器输出的音频信号(也即外置麦克风基于扬声器发声采集的第二音频信号)可以用y(t)表示。Exemplarily, the audio test signal (that is, the first audio signal) input to the speaker is s(t), and the audio signal output by the speaker (that is, the second audio signal collected by the external microphone based on the sound of the speaker) can be represented by y ( t) indicates.
步骤202、对所述第一音频信号进行逆滤波处理，生成逆滤波音频信号。Step 202: Perform inverse filtering processing on the first audio signal to generate an inversely filtered audio signal.
在本申请实施例中，对第一音频信号s(t)进行逆滤波处理，生成逆滤波音频信号其中， In this embodiment of the present application, inverse filtering is performed on the first audio signal s(t) to generate an inversely filtered audio signal in,
步骤203、对所述逆滤波音频信号与所述第二音频信号进行卷积操作，生成音频脉冲序列信号。Step 203: Perform a convolution operation on the inversely filtered audio signal and the second audio signal to generate an audio pulse sequence signal.
在本申请实施例中，对逆滤波音频信号与所述第二音频信号y(t)进行卷积操作，生成音频脉冲序列信号，生成的音频脉冲序列信号可以分解为多个脉冲响应的和。因此，可有如下表达式：示例性的，图3为生成的音频脉冲序列信号图。In this embodiment of the present application, the inversely filtered audio signal is A convolution operation is performed with the second audio signal y(t) to generate an audio pulse sequence signal, and the generated audio pulse sequence signal can be decomposed into the sum of a plurality of impulse responses. Therefore, the following expression can be obtained: Exemplarily, FIG. 3 is a diagram of the generated audio pulse sequence signal.
步骤204、根据所述音频脉冲序列信号获取预设数量个谐波脉冲响应。Step 204: Acquire a preset number of harmonic impulse responses according to the audio pulse sequence signal.
示例性的，根据音频脉冲序列信号获取5个谐波脉冲响应，也即m＝5。Exemplarily, 5 harmonic impulse responses are obtained according to the audio pulse sequence signal, that is, m=5.
步骤205、针对所述预设数量个谐波脉冲响应，对每个谐波脉冲响应进行傅里叶变换，得到与所述谐波脉冲响应对应的谐波失真。Step 205: For the preset number of harmonic impulse responses, perform Fourier transform on each harmonic impulse response to obtain the harmonic distortion corresponding to the harmonic impulse response.
在本申请实施例中，对每个谐波脉冲响应进行傅里叶变换，得到与谐波脉冲响应对应的谐波失真，即Hi(f)＝FFT[hi(t)],i＝1,2,…,m，其中，hi(t)表示第i个谐波脉冲响应，Hi(f)表示与hi(t)对应的谐波失真。In the embodiment of the present application, Fourier transform is performed on each harmonic impulse response to obtain the harmonic distortion corresponding to the harmonic impulse response, that is, H i (f)=FFT[h i (t)], i= 1,2,…,m, where hi (t) represents the ith harmonic impulse response and Hi (f) represents the harmonic distortion corresponding to hi (t).
步骤206、根据每个谐波失真计算所述扬声器的总谐波失真。Step 206: Calculate the total harmonic distortion of the speaker according to each harmonic distortion.
示例性的，根据公式计算扬声器的总谐波失真。Exemplary, according to the formula Calculates the total harmonic distortion of the speaker.
本申请实施例中提供的扬声器总谐波失真测量方法，当扬声器和外置麦克风处于安静环境时，获取驱动扬声器发声的第一音频信号及获取外置麦克风基于扬声器发声采集的第二音频信号，然后对第一音频信号进行逆滤波处理，生成逆滤波音频信号，并对逆滤波音频信号与第二音频信号进行卷积操作，生成音频脉冲序列信号，根据音频脉冲序列信号获取预设数量个谐波脉冲响应，最后针对预设数量个谐波脉冲响应，对每个谐波脉冲响应进行傅里叶变换，得到与谐波脉冲响应对应的谐波失真，并根据每个谐波失真计算扬声器的总谐波失真。通过采用上述技术方案，可以快速、精确地测量出扬声器的总谐波失真，尤其是针对移动终端上的扬声器的总谐波失真的测量，不需要从移动终端上引出导线来测量扬声器的电流电压信号，可以有效避免硬件改动带来的资源浪费。In the method for measuring the total harmonic distortion of a speaker provided in the embodiment of the present application, when the speaker and the external microphone are in a quiet environment, a first audio signal that drives the speaker to sound and a second audio signal that is collected by the external microphone based on the sound of the speaker is acquired, Then perform inverse filtering processing on the first audio signal to generate an inversely filtered audio signal, and perform a convolution operation on the inversely filtered audio signal and the second audio signal to generate an audio pulse sequence signal, and obtain a preset number of harmonics according to the audio pulse sequence signal. wave impulse response, and finally, for a preset number of harmonic impulse responses, Fourier transform is performed on each harmonic impulse response to obtain the harmonic distortion corresponding to the harmonic impulse response, and the speaker's distortion is calculated according to each harmonic distortion. Total Harmonic Distortion. By adopting the above technical solution, the total harmonic distortion of the speaker can be measured quickly and accurately, especially for the measurement of the total harmonic distortion of the speaker on the mobile terminal, it is not necessary to lead out wires from the mobile terminal to measure the current and voltage of the speaker Signal, can effectively avoid the waste of resources caused by hardware changes.
图4为本申请实施例提供的一种扬声器总谐波失真测量装置的结构示意图，该装置可由软件和/或硬件实现，一般集成在测量系统中，可通过执行扬声器总谐波失真测量方法来对扬声器的总谐波失真进行测量。如图4所示，该装置包括：4 is a schematic structural diagram of a device for measuring total harmonic distortion of a loudspeaker according to an embodiment of the present application. The device can be implemented by software and/or hardware, and is generally integrated in a measurement system. The total harmonic distortion of the loudspeaker is measured. As shown in Figure 4, the device includes:
第一音频信号获取模块401，用于获取驱动所述扬声器发声的第一音频信号；a first audio signal acquisition module 401, configured to acquire a first audio signal that drives the speaker to sound;
第二音频信号获取模块402，用于获取外置麦克风基于所述扬声器发声采集的第二音频信号；The second audio signal acquisition module 402 is configured to acquire the second audio signal collected by the external microphone based on the sound of the speaker;
总谐波失真计算模块403，用于根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。A total harmonic distortion calculation module 403, configured to calculate the total harmonic distortion of the speaker according to the first audio signal and the second audio signal.
本申请实施例中提供的扬声器总谐波失真测量装置，获取驱动所述扬声器发声的第一音频信号；获取外置麦克风基于所述扬声器发声采集的第二音频信号；根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。通过采用上述技术方案，可以快速、精确地测量出扬声器的总谐波失真，尤其是针对移动终端上的扬声器的总谐波失真的测量。The device for measuring total harmonic distortion of a speaker provided in the embodiment of the present application acquires a first audio signal that drives the speaker to sound; acquires a second audio signal collected by an external microphone based on the sound of the speaker; according to the first audio signal and the second audio signal to calculate the total harmonic distortion of the speaker. By adopting the above technical solution, the total harmonic distortion of the loudspeaker can be measured quickly and accurately, especially for the measurement of the total harmonic distortion of the loudspeaker on the mobile terminal.
可选的，所述总谐波失真计算模块，包括：Optionally, the total harmonic distortion calculation module includes:
逆滤波处理单元，用于对所述第一音频信号进行逆滤波处理，生成逆滤波音频信号；an inverse filtering processing unit, configured to perform inverse filtering processing on the first audio signal to generate an inverse filtering audio signal;
卷积操作单元，用于对所述逆滤波音频信号与所述第二音频信号进行卷积操作，生成音频脉冲序列信号；a convolution operation unit, configured to perform a convolution operation on the inversely filtered audio signal and the second audio signal to generate an audio pulse sequence signal;
总谐波失真计算单元，用于根据所述音频脉冲序列信号计算所述扬声器的总谐波失真。A total harmonic distortion calculation unit, configured to calculate the total harmonic distortion of the speaker according to the audio pulse sequence signal.
可选的，总谐波失真计算单元，用于：Optional, total harmonic distortion calculation unit for:
根据所述音频脉冲序列信号获取预设数量个谐波脉冲响应；obtaining a preset number of harmonic impulse responses according to the audio pulse sequence signal;
针对所述预设数量个谐波脉冲响应，对每个谐波脉冲响应进行傅里叶变换，得到与所述谐波脉冲响应对应的谐波失真；For the preset number of harmonic impulse responses, Fourier transform is performed on each harmonic impulse response to obtain the harmonic distortion corresponding to the harmonic impulse response;
根据每个谐波失真计算所述扬声器的总谐波失真。The total harmonic distortion of the loudspeaker is calculated from each harmonic distortion.
可选的，根据每个谐波失真计算所述扬声器的总谐波失真，包括：Optionally, calculating the total harmonic distortion of the speaker according to each harmonic distortion, including:
根据如下公式计算所述扬声器的总谐波失真：Calculate the total harmonic distortion of the loudspeaker according to the following formula:
其中，THD表示总谐波失真，Hi表示第i个谐波脉冲响应对应的谐波失真，m表示谐波脉冲响应的数量。Among them, THD represents the total harmonic distortion, H i represents the harmonic distortion corresponding to the ith harmonic impulse response, and m represents the number of harmonic impulse responses.
可选的，m＝5。Optionally, m=5.
可选的，所述第一音频信号的表达式如下：Optionally, the expression of the first audio signal is as follows:
其中，s(t)表示所述第一音频信号，f1表示所述第一音频信号的起始频点，f2表示所述第一音频信号的截止频点，T表示所述第一音频信号的时长。in, s(t) represents the first audio signal, f 1 represents the starting frequency of the first audio signal, f 2 represents the cut-off frequency of the first audio signal, and T represents the frequency of the first audio signal. duration.
可选的，获取驱动所述扬声器发声的第一音频信号及获取外置麦克风基于所述扬声器发声采集的第二音频信号，包括：Optionally, acquiring a first audio signal that drives the speaker to sound and acquiring a second audio signal that is collected by an external microphone based on the speaker's sound, including:
当所述扬声器和所述外置麦克风处于安静环境时，获取驱动所述扬声器发声的第一音频信号及获取外置麦克风基于所述扬声器发声采集的第二音频信号；其中，所述扬声器与所述外置麦克风间的距离小于预设距离阈值。When the speaker and the external microphone are in a quiet environment, acquire a first audio signal that drives the speaker to sound, and acquire a second audio signal that is collected by the external microphone based on the sound of the speaker; wherein the speaker and the The distance between the external microphones is less than the preset distance threshold.
本申请实施例还提供一种包含计算机可执行指令的存储介质，所述计算机可执行指令在由计算机处理器执行时用于执行扬声器总谐波失真测量方法，该方法包括：Embodiments of the present application also provide a storage medium containing computer-executable instructions, where the computer-executable instructions are used to execute a method for measuring total harmonic distortion of a speaker when executed by a computer processor, and the method includes:
获取驱动所述扬声器发声的第一音频信号；obtaining a first audio signal that drives the speaker to sound;
获取外置麦克风基于所述扬声器发声采集的第二音频信号；acquiring the second audio signal collected by the external microphone based on the sound of the speaker;
根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真。The total harmonic distortion of the speaker is calculated from the first audio signal and the second audio signal.
存储介质——任何的各种类型的存储器设备或存储设备。术语“存储介质”旨在包括：安装介质，例如CD-ROM、软盘或磁带装置；计算机系统存储器或随机存取存储器，诸如DRAM、DDRRAM、SRAM、EDORAM，兰巴斯(Rambus)RAM等；非易失性存储器，诸如闪存、磁介质(例如硬盘或光存储)；寄存器或其它相似类型的存储器元件等。存储介质可以还包括其它类型的存储器或其组合。另外，存储介质可以位于程序在其中被执行的第一计算机系统中，或者可以位于不同的第二计算机系统中，第二计算机系统通过网络(诸如因特网)连接到第一计算机系统。第二计算机系统可以提供程序指令给第一计算机用于执行。术语“存储介质”可以包括可以驻留在不同位置中(例如在通过网络连接的不同计算机系统中)的两个或更多存储介质。存储介质可以存储可由一个或多个处理器执行的程序指令(例如具体实现为计算机程序)。storage medium - any of various types of memory devices or storage devices. The term "storage medium" is intended to include: installation media, such as CD-ROMs, floppy disks, or tape devices; computer system memory or random access memory, such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile Volatile memory, such as flash memory, magnetic media (eg hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in the first computer system in which the program is executed, or may be located in a second, different computer system connected to the first computer system through a network such as the Internet. The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations (eg, in different computer systems connected by a network). The storage medium may store program instructions (eg, embodied as a computer program) executable by one or more processors.
当然，本申请实施例所提供的一种包含计算机可执行指令的存储介质，其计算机可执行指令不限于如上所述的扬声器总谐波失真测量操作，还可以执行本申请任意实施例所提供的扬声器总谐波失真测量方法中的相关操作。Of course, a storage medium containing computer-executable instructions provided by the embodiments of the present application, the computer-executable instructions of which are not limited to the above-mentioned total harmonic distortion measurement operation of the speaker, and can also execute the operations provided by any embodiment of the present application. Relevant operations in the Total Harmonic Distortion Measurement Method for Loudspeakers.
本申请实施例提供了一种测量系统，该测量系统中可集成本申请实施例提供的扬声器总谐波失真测量装置。图5为本申请实施例提供的一种测量系统的结构示意图。测量系统500可以包括：外置麦克风501，存储器502，处理器503及存储在存储器上并可在处理器运行的计算机程序，所述处理器503执行所述计算机程序时实现如本申请实施例所述的扬声器总谐波失真测量方法。The embodiment of the present application provides a measurement system, in which the device for measuring the total harmonic distortion of the loudspeaker provided by the embodiment of the present application can be integrated. FIG. 5 is a schematic structural diagram of a measurement system provided by an embodiment of the present application. The measurement system 500 may include: an external microphone 501, a memory 502, a processor 503, and a computer program stored in the memory and executed by the processor. The method for measuring the total harmonic distortion of a loudspeaker described above.
本申请实施例提供的测量系统，获取驱动所述扬声器发声的第一音频信号，并获取外置麦克风基于所述扬声器发声采集的第二音频信号，然后根据所述第一音频信号和所述第二音频信号计算所述扬声器的总谐波失真，可以快速、精确地测量出扬声器的总谐波失真，尤其是针对移动终端上的扬声器的总谐波失真的测量。The measurement system provided in the embodiment of the present application acquires a first audio signal that drives the speaker to sound, and acquires a second audio signal collected by an external microphone based on the speaker's sound, and then according to the first audio signal and the first audio signal The total harmonic distortion of the speaker is calculated from the two audio signals, and the total harmonic distortion of the speaker can be measured quickly and accurately, especially for the measurement of the total harmonic distortion of the speaker on the mobile terminal.
上述实施例中提供的扬声器总谐波失真测量装置、存储介质及测量系统可执行本申请任意实施例所提供的扬声器总谐波失真测量方法，具备执行该方法相应的功能模块和有益效果。未在上述实施例中详尽描述的技术细节，可参见本申请任意实施例所提供的扬声器总谐波失真测量方法。The loudspeaker total harmonic distortion measurement device, storage medium and measurement system provided in the above embodiments can execute the loudspeaker total harmonic distortion measurement method provided by any embodiment of the present application, and have corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in the foregoing embodiments, reference may be made to the method for measuring total harmonic distortion of a speaker provided in any embodiment of the present application.
注意，上述仅为本申请的较佳实施例及所运用技术原理。本领域技术人员会理解，本申请不限于这里所述的特定实施例，对本领域技术人员来说能够进行各种明显的变化、重新调整和替代而不会脱离本申请的保护范围。因此，虽然通过以上实施例对本申请进行了较为详细的说明，但是本申请不仅仅限于以上实施例，在不脱离本申请构思的情况下，还可以包括更多其他等效实施例，而本申请的范围由所附的权利要求范围决定。Note that the above are only preferred embodiments of the present application and applied technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present application. The scope is determined by the scope of the appended claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273559.6A CN109379689A (en) | 2018-10-30 | 2018-10-30 | Loudspeaker total harmonic distortion measurement method, device, storage medium and measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273559.6A CN109379689A (en) | 2018-10-30 | 2018-10-30 | Loudspeaker total harmonic distortion measurement method, device, storage medium and measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109379689A true CN109379689A (en) | 2019-02-22 |
Family
ID=65390247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811273559.6A Pending CN109379689A (en) | 2018-10-30 | 2018-10-30 | Loudspeaker total harmonic distortion measurement method, device, storage medium and measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109379689A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110493691A (en) * | 2019-08-23 | 2019-11-22 | Oppo广东移动通信有限公司 | Abnormal sound detection method, device and electronic equipment |
| CN110944280A (en) * | 2019-11-13 | 2020-03-31 | 歌尔股份有限公司 | Noise test system and test method for digital microphone |
| CN113132856A (en) * | 2021-03-30 | 2021-07-16 | 联想(北京)有限公司 | Audio signal processing method, electronic equipment and storage medium |
| CN114203197A (en) * | 2020-09-17 | 2022-03-18 | 广州汽车集团股份有限公司 | Objective evaluation method, system, equipment and storage medium for in-vehicle audio quality |
| CN114667568A (en) * | 2019-10-10 | 2022-06-24 | 国际商业机器公司 | Improving audio quality of speech in a sound system |
| EP4072162A1 (en) * | 2021-04-09 | 2022-10-12 | Sagemcom Broadband Sas | Method for auto-diagnosis of an audio playback device |
| CN115696163A (en) * | 2022-09-26 | 2023-02-03 | 苏州井利电子股份有限公司 | An electronic organ horn detection system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584204B1 (en) * | 1997-12-11 | 2003-06-24 | The Regents Of The University Of California | Loudspeaker system with feedback control for improved bandwidth and distortion reduction |
| CN101448180A (en) * | 2007-11-26 | 2009-06-03 | 比亚迪股份有限公司 | Test system of mobile telephone speaker |
| CN102487451A (en) * | 2010-12-02 | 2012-06-06 | 深圳市同洲电子股份有限公司 | Voice frequency test method for digital television receiving terminal and system thereof |
| CN105681996A (en) * | 2016-04-06 | 2016-06-15 | 北京瑞森新谱科技有限公司 | High-efficiency microphone maximum output voltage measurement method |
| CN106331951A (en) * | 2016-08-18 | 2017-01-11 | 苏州上声电子有限公司 | Harmonic distortion measurement method and system based on continuous logarithmic swept response |
| CN206313975U (en) * | 2016-08-29 | 2017-07-07 | 苏州上声电子有限公司 | A kind of harmonic distortion measurement apparatus for audio system |
-
2018
- 2018-10-30 CN CN201811273559.6A patent/CN109379689A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584204B1 (en) * | 1997-12-11 | 2003-06-24 | The Regents Of The University Of California | Loudspeaker system with feedback control for improved bandwidth and distortion reduction |
| CN101448180A (en) * | 2007-11-26 | 2009-06-03 | 比亚迪股份有限公司 | Test system of mobile telephone speaker |
| CN102487451A (en) * | 2010-12-02 | 2012-06-06 | 深圳市同洲电子股份有限公司 | Voice frequency test method for digital television receiving terminal and system thereof |
| CN105681996A (en) * | 2016-04-06 | 2016-06-15 | 北京瑞森新谱科技有限公司 | High-efficiency microphone maximum output voltage measurement method |
| CN106331951A (en) * | 2016-08-18 | 2017-01-11 | 苏州上声电子有限公司 | Harmonic distortion measurement method and system based on continuous logarithmic swept response |
| CN206313975U (en) * | 2016-08-29 | 2017-07-07 | 苏州上声电子有限公司 | A kind of harmonic distortion measurement apparatus for audio system |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110493691A (en) * | 2019-08-23 | 2019-11-22 | Oppo广东移动通信有限公司 | Abnormal sound detection method, device and electronic equipment |
| CN114667568A (en) * | 2019-10-10 | 2022-06-24 | 国际商业机器公司 | Improving audio quality of speech in a sound system |
| CN110944280A (en) * | 2019-11-13 | 2020-03-31 | 歌尔股份有限公司 | Noise test system and test method for digital microphone |
| CN110944280B (en) * | 2019-11-13 | 2021-08-31 | 潍坊歌尔微电子有限公司 | Noise test system and test method for digital microphone |
| CN114203197A (en) * | 2020-09-17 | 2022-03-18 | 广州汽车集团股份有限公司 | Objective evaluation method, system, equipment and storage medium for in-vehicle audio quality |
| CN113132856A (en) * | 2021-03-30 | 2021-07-16 | 联想(北京)有限公司 | Audio signal processing method, electronic equipment and storage medium |
| CN113132856B (en) * | 2021-03-30 | 2023-08-18 | 联想(北京)有限公司 | Audio signal processing method, electronic equipment and storage medium |
| EP4072162A1 (en) * | 2021-04-09 | 2022-10-12 | Sagemcom Broadband Sas | Method for auto-diagnosis of an audio playback device |
| FR3121810A1 (en) * | 2021-04-09 | 2022-10-14 | Sagemcom Broadband Sas | Process for self-diagnosis of audio reproduction equipment |
| US12156002B2 (en) | 2021-04-09 | 2024-11-26 | Sagemcom Broadband Sas | Procede d'auto-diagnostic d'un equipement de restitution audio |
| CN115696163A (en) * | 2022-09-26 | 2023-02-03 | 苏州井利电子股份有限公司 | An electronic organ horn detection system and method |
| CN115696163B (en) * | 2022-09-26 | 2024-12-27 | 苏州井利电子股份有限公司 | Electronic piano speaker detection system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109379689A (en) | Loudspeaker total harmonic distortion measurement method, device, storage medium and measurement system | |
| CN105355213B (en) | Directional recording method and device | |
| CN111402910B (en) | Method and equipment for eliminating echo | |
| US8050422B2 (en) | Audio test apparatus capable of decreasing noise influence in process of audio device testing and method thereof | |
| CN109831733A (en) | Test method, device, equipment and the storage medium of audio broadcast performance | |
| CN109979469B (en) | Signal processing method, device and storage medium | |
| CN108430024B (en) | Measuring method of noise reduction earphone | |
| WO2016184138A1 (en) | Method, mobile terminal and computer storage medium for adjusting audio parameters | |
| TWI684366B (en) | Isolation, extraction and evaluation of transient distortions from a composite signal | |
| CN104937955B (en) | Automatic loud speaker Check up polarity | |
| JP2014072871A5 (en) | ||
| JP2024528596A (en) | Speech improvement | |
| CN105764008B (en) | A method and device for debugging the transmission frequency characteristics of a sound reinforcement system | |
| US9769582B1 (en) | Audio source and audio sensor testing | |
| CN112997249B (en) | Voice processing method, device, storage medium and electronic equipment | |
| CN114627897A (en) | Audio signal abnormality monitoring method, device, equipment, medium and program product | |
| CN114299982A (en) | Method, device and electronic device for processing audio signal | |
| CN113409800B (en) | Processing method and device for monitoring audio, storage medium and electronic equipment | |
| CN114827865A (en) | Frequency response curve detection method, device, equipment and storage medium of audio equipment | |
| JP2012114826A (en) | Acoustic correction apparatus and acoustic correction method | |
| JP2024526679A (en) | Data Augmentation for Speech Improvement | |
| CN114724575A (en) | Howling detection method, device and system | |
| CN114678038A (en) | Audio noise detection method, computer device and computer program product | |
| CN113473348B (en) | Method for positioning frequency sweeping sound source, method, system and equipment for testing quality of audio equipment | |
| CN111885474A (en) | Microphone testing method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190222 |