CN101448180B - Test system of mobile telephone speaker - Google Patents
Test system of mobile telephone speaker Download PDFInfo
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- CN101448180B CN101448180B CN2007101247001A CN200710124700A CN101448180B CN 101448180 B CN101448180 B CN 101448180B CN 2007101247001 A CN2007101247001 A CN 2007101247001A CN 200710124700 A CN200710124700 A CN 200710124700A CN 101448180 B CN101448180 B CN 101448180B
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Abstract
The invention is adapted for the test field of a mobile telephone, and provides a test system of a mobile telephone speaker, comprising a sound card, a test control unit, an amplifier, a pinboard, a microphone and a power amplifier; the test system of the mobile telephone speaker is constituted by integrating the existing devices with mature techniques, uses the sound card as a capture card, and replaces the special audio analytical apparatus and ear test, with low cost and accurate test.
Description
Technical field
The invention belongs to the mobile phone field tests, relate in particular to a kind of test system of mobile telephone speaker.
Background technology
The transmission of mobile phone speech and the quality of reception are vital problems to mobile subscriber's conversation; It is the direct factor of weighing mobile phone quality quality; The speech that meanwhile also will guarantee the mobile phone receiving demodulation and spread out of through loud speaker should be to human body, and especially people's ear damages.
Traditional method that mobile telephone speaker is tested mainly contains two kinds, and a kind of method is to listen with ear, and the cost of this method is very low, but can produce the inaccurate problem of test owing to artificial judgement.In order to improve the accuracy of test, a kind of in addition method adopts special-purpose audio analysis instrument, make the mobile phone sounding and analyze sound, but the cost of this method of testing is too high, can not be applicable in a large amount of production processes the test to mobile phone.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of test system of mobile telephone speaker, is intended to solve the too high problem of prior mobile phone loud speaker test system and test cost.
The embodiment of the invention is achieved in that a kind of test system of mobile telephone speaker, and this system comprises:
Sound card is used to send the audio-frequency test signal, and converts the audio signal of receiving into digital audio and video signals;
Unit of testing and controlling is used to control said sound card and sends the audio-frequency test signal, judges that according to the digital audio and video signals of said sound card output whether the test parameter of mobile telephone speaker exceeds the threshold value of configuration, outputs test result;
Amplifier, the audio-frequency test signal that is used for sound card is sent amplifies;
Keyset is connected with mobile phone connector, is used for the audio-frequency test signal after amplifying is sent to mobile phone;
Microphone is used to gather the audio signal that mobile telephone speaker sends; And
Power amplifier is used for the audio signal of microphone output is carried out power amplification, exports to said sound card.
The embodiment of the invention is formed test system of mobile telephone speaker through integrated device existing, technology maturation, especially adopts sound card to serve as capture card, replaces the test of special-purpose audio analysis instrument and people's ear, and with low cost, test accurately.
Description of drawings
Fig. 1 is the structure chart of the test system of mobile telephone speaker that provides of the embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the present invention; Utilize device existing, technology maturation to form test system of mobile telephone speaker, particularly adopt sound card to serve as capture card, replace the test of special-purpose audio analysis instrument and people's ear; It is with low cost to adopt this system to have, characteristic of accurate test.
In the mobile phone production process; Test to mobile telephone speaker relates generally to sound pressure level (SoundPressure Level; SPL) and total harmonic distortion (Total Harmonic Distortion; Whether test THD), the sound pressure level that detects mobile telephone speaker and total harmonic distortion be in the scope that the client stipulates, in order to avoid user's health is damaged.Sound pressure level is used for embodying the sound intensity or volume, is mainly used in the power of expression acoustic energy, and this parameter also is the fiducial value that national metrological service is used for calibrating various hearing instruments, and its unit is a decibel.Decibel is the unit that is used for representing the intensity of sound size, on physical acoustics, it be acoustic pressure P with measurement point divided by reference acoustic pressure Pr, calculate through logarithm then, its formula is:
Sound pressure level SPL=20*lg (P/Pr)
When total harmonic distortion is meant the signal source input; Because the extra harmonic components that the caused output signal of non-linear element (harmonic wave and frequency multiplication composition thereof) has more than input signal; Harmonic distortion is recently represented with the root mean square and the percentage of original signal effective value of newly-increased totalling harmonic wave composition owing to system is not that complete linearity causes.
Fig. 1 shows the structure of the test system of mobile telephone speaker that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the present invention.Wherein, test macro 11 is connected with mobile phone 13 through connector 12, realizes the test to mobile phone 13 loud speakers.
Unit of testing and controlling 111 is for running on the software systems of equipment such as computer; As an example of the present invention; Unit of testing and controlling 111 can adopt the LabVIEW virtual instrument software, and the Research of Analysis System for Harmonic Distortion that this software carries (Harmonic Distortion Analyzer) function can be gathered the data in the digital audio and video signals; Obtain total harmonic distortion THD value after treatment, sound card 112 is installed on computers.When test; Testing control module 1111 control sound cards 112 through unit of testing and controlling 111 send the audio-frequency test signal; Amplifier 113 receives the audio-frequency test signal that sound card 112 sends, and the audio-frequency test signal is amplified, and sends to mobile phone 13 through keyset 114 through connector 12; After mobile phone 13 received the audio-frequency test signal, its loud speaker sent audio signal.Microphone 115 is gathered the audio signal that mobile phone 13 loud speakers send, and through sending to sound card 112 after power amplifier 116 power amplifications, the audio signal that 112 pairs of power amplifiers of sound card 116 send is carried out mould/number conversion; Convert simulated audio signal into digital audio and video signals; The sound pressure level computing module 1112 of unit of testing and controlling 111 collects acoustic pressure P from this digital audio and video signals, through formula S PL=20*lg (P/Pr), calculate sound pressure level SPL value; Threshold value comparison module 1114 with the threshold ratio of the SPL value that obtains and test threshold configuration module 1113 configurations; If the SPL value is in the threshold range of configuration, test result output module 1115 is exported the information of test passes, otherwise; If the SPL value is exported the information of test failure not in the threshold range that is provided with.
Simultaneously; The data that the Research of Analysis System for Harmonic Distortion module 1116 of unit of testing and controlling 111 is gathered in the digital audio and video signals; Obtain total harmonic distortion THD value after treatment, do comparison with the threshold range of configuration, test result output module 1115 shows output with test result.
After system's connection finishes and changes system unit; All to calibrate system; Calibration comprises that it is to adopt special-purpose calibration software that sound card 112 is calibrated to the calibration of sound card 112 with to the calibration of input signal, is to adopt universal instrument to measure the voltage of the test point of power amplifier 116 to the calibration of input signal; See whether meet the requirements, do not meet the volume button of just regulating sound card 112.
The embodiment of the invention is formed test system of mobile telephone speaker through integrated device existing, technology maturation, especially adopts sound card to serve as capture card, replaces the test of special-purpose audio analysis instrument and people's ear, and with low cost, test accurately.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a test system of mobile telephone speaker is characterized in that, said test macro comprises:
Sound card is used to send the audio-frequency test signal, and converts the audio signal of receiving into digital audio and video signals;
Unit of testing and controlling is used to control said sound card and sends the audio-frequency test signal, judges that according to the digital audio and video signals of said sound card output whether the test parameter of mobile telephone speaker exceeds the threshold value of configuration, outputs test result;
Amplifier, the audio-frequency test signal that is used for sound card is sent amplifies;
Keyset is connected with mobile phone connector, is used for the audio-frequency test signal after amplifying is sent to mobile phone;
Microphone is used to gather the audio signal that mobile telephone speaker sends; And
Power amplifier is used for the audio signal of microphone output is carried out power amplification, exports to said sound card.
2. the system of claim 1 is characterized in that, said unit of testing and controlling comprises:
Testing control module is used for sending test control signal to said sound card, controls said sound card and sends the audio-frequency test signal;
The test threshold configuration module is used to dispose the threshold range that the mobile telephone speaker test parameter is satisfied; And
The test result judge module is used for judging that according to the digital audio and video signals of said sound card output whether the test parameter of mobile telephone speaker exceeds the threshold range of configuration, outputs test result.
3. system as claimed in claim 2 is characterized in that, said test parameter is sound pressure level and total harmonic distortion.
4. system as claimed in claim 3 is characterized in that, said test result judge module comprises:
The sound pressure level computing module is used for collecting acoustic pressure from said digital audio and video signals, calculates corresponding sound pressure level value;
The Research of Analysis System for Harmonic Distortion module, the data that are used for gathering digital audio and video signals are obtained corresponding total harmonic distortion value after treatment;
The threshold value comparison module is used for the threshold range of said sound pressure level value and total harmonic distortion value and configuration is compared; And
Test result output module is used for the comparative result according to said threshold value comparison module, and test result is exported.
5. system as claimed in claim 4 is characterized in that, said sound pressure level value is according to computes:
SPL＝20*lg(P/Pr)，
Wherein, SPL is the sound pressure level value, and P gathers the acoustic pressure that obtains from digital audio and video signals, and Pr is a reference acoustic pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101247001A CN101448180B (en) | 2007-11-26 | 2007-11-26 | Test system of mobile telephone speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101247001A CN101448180B (en) | 2007-11-26 | 2007-11-26 | Test system of mobile telephone speaker |
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| Publication Number | Publication Date |
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| CN101448180A CN101448180A (en) | 2009-06-03 |
| CN101448180B true CN101448180B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101247001A Expired - Fee Related CN101448180B (en) | 2007-11-26 | 2007-11-26 | Test system of mobile telephone speaker |
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Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510417A (en) * | 2011-09-29 | 2012-06-20 | 太仓市同维电子有限公司 | Hand-free tone quality testing system of IP (internet protocol) phone terminal device and method thereof |
| CN102984634A (en) * | 2011-11-22 | 2013-03-20 | 南京工程学院 | Digital hearing-aid unequal-width sub-band automatic gain control method |
| CN103179496A (en) * | 2011-12-20 | 2013-06-26 | 比亚迪股份有限公司 | Audio test method and system for earphone microphone and receiver of mobile terminal |
| CN102421056A (en) * | 2011-12-26 | 2012-04-18 | 华为终端有限公司 | Method and device for detecting speaker |
| CN103634730A (en) * | 2012-08-20 | 2014-03-12 | 上海斐讯数据通信技术有限公司 | Audio parameter automatic adjustment system and method used for mobile terminal assembling line |
| TWI475870B (en) * | 2012-09-12 | 2015-03-01 | Wistron Corp | Testing apparatus and method for telephone apparatus |
| CN102970400B (en) * | 2012-11-09 | 2015-07-29 | 深圳市金立通信设备有限公司 | The method of testing that a kind of receiver is aging and system |
| CN104269177B (en) * | 2014-09-22 | 2017-11-07 | 联想(北京)有限公司 | A kind of method of speech processing and electronic equipment |
| CN104486713B (en) * | 2014-11-25 | 2018-01-23 | 宁波中荣声学科技有限公司 | Audio frequency power amplifier test system and method |
| CN104640054B (en) * | 2015-02-12 | 2018-02-02 | 广东欧珀移动通信有限公司 | Mobile terminal receiver/loudspeaker method of testing and system |
| CN105228069B (en) * | 2015-09-28 | 2018-08-17 | 南京工程学院 | A kind of digital deaf-aid dynamic range compression method based on sound pressure level segmentation |
| CN105635925B (en) * | 2015-12-24 | 2019-03-01 | 小米科技有限责任公司 | Audio testing method, system and the audio-frequency test interface adapter of mobile terminal |
| CN106068008B (en) * | 2016-08-15 | 2019-07-19 | 歌尔科技有限公司 | Audio-frequence player device distortion measurement method |
| CN106646479A (en) * | 2016-11-23 | 2017-05-10 | 南京航空航天大学 | Synchronous data acquisition system and acquisition method based on LabVIEW and sound card |
| CN107659882A (en) * | 2017-08-31 | 2018-02-02 | 安徽信息工程学院 | Classroom sound equipment test device |
| CN108462933A (en) * | 2018-02-27 | 2018-08-28 | 顶力视听（深圳）有限公司 | A kind of audio-frequency test device and method |
| CN109379689A (en) * | 2018-10-30 | 2019-02-22 | Oppo广东移动通信有限公司 | Loudspeaker total harmonic distortion measurement method, device, storage medium and measuring system |
| 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 |
| CN111065036B (en) * | 2019-12-26 | 2021-08-31 | 北京声智科技有限公司 | Frequency response testing method and device of microphone array |
| CN111541981B (en) * | 2020-03-30 | 2021-10-22 | 宇龙计算机通信科技(深圳)有限公司 | Audio processing method and device, storage medium and terminal |
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| CN1812349A (en) * | 2005-01-26 | 2006-08-02 | 华为技术有限公司 | Automatic testing device for audio-frequency index |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812349A (en) * | 2005-01-26 | 2006-08-02 | 华为技术有限公司 | Automatic testing device for audio-frequency index |
| CN1988567A (en) * | 2006-11-22 | 2007-06-27 | 华为技术有限公司 | System, device and method for detecting terminal audio signal strength |
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| JP特开2005-223553A 2005.08.18 |
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