CN1758226A - The method of the automatic detection computations machine of loop-type audio frequency apparatus playing function - Google Patents
The method of the automatic detection computations machine of loop-type audio frequency apparatus playing function Download PDFInfo
- Publication number
- CN1758226A CN1758226A CN 200410051837 CN200410051837A CN1758226A CN 1758226 A CN1758226 A CN 1758226A CN 200410051837 CN200410051837 CN 200410051837 CN 200410051837 A CN200410051837 A CN 200410051837A CN 1758226 A CN1758226 A CN 1758226A
- Authority
- CN
- China
- Prior art keywords
- audio file
- audio
- output port
- standard
- recording
- 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
Images
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The invention provides the method for the automatic detection computations machine of a kind of loop-type audio frequency apparatus playing function, this method comprises the steps: the production standard audio file; The input port and its output port that connect computer audio equipment; The playing standard audio file is by the output port output audio signal; Input port receives the sound signal of being exported by output port, and saves as the recording audio file on computers automatically; Recording audio file and standard audio file are compared, judge whether the two is identical, if identical, then testing result is that playing function is normal; Otherwise testing result is that playing function is unusual.The present invention can not limit the parts assembling procedure of production firm in testing process, and has utilized fast Fourier transformation algorithm to carry out computing, guarantees precision of test result.
Description
[technical field]
The present invention relates to a kind of method of detection computations machine audio frequency apparatus, normally whether particularly a kind of automatic detection computations machine audio frequency apparatus playing function method.
[background technology]
In the production run of computing machine, need carry out Function detection to the audio frequency apparatus of computing machine.Present test mode is a displaying audio file on the audio frequency apparatus of computing machine, and simultaneously output port connects audio amplifier or earphone, and by artificial audition, whether artificial judgment can be play then, whether left and right acoustic channels is all normal etc.
This method of testing causes certain puzzlement to manufacturer: 1. the audio frequency apparatus of every computing machine all need be listened by artificial, has increased human cost and has caused the production capacity bottleneck; 2. can't guarantee test mass, the environmental interference factor may cause artificial misjudgment, and then may make the problematic computer audio equipment of broadcast by quality inspection.
Other method of testing has appearred in industry, has solved above-mentioned puzzlement to a certain extent.As China national Department of Intellectual Property on July 14th, 2004 disclosed application number be 02159937.8 application for a patent for invention case, the name of this application for a patent for invention case is called the method for detection computations device CD voice playing function " automatically ".This application for a patent for invention case adopts computer automation detection computations machine CD voice playing function, and it is recorded in play CD, and the same CD audio frequency of being play of the result that will record compares, thereby judges whether computing machine CD voice playing function is normal.
Though this application for a patent for invention case has solved the puzzlement that conventional test methodologies brings manufacturer, but its technical scheme still has following weak point: 1. need be in the CD-ROM drive play CD, that is to say to assemble under the intact situation at CD-ROM drive and just can carry out audio detection, define the parts assembling procedure of production firm; Its whether can test CD voice playing function on the whole normal, whether the audio loop that every pair of input port and output port constituted that cannot specifically detect audio frequency apparatus working properly.
Therefore, need a kind of more efficiently detection method that can overcome the existing weak point of above application for a patent for invention case.
[summary of the invention]
The object of the invention is, the method of the automatic detection computations machine of a kind of loop-type audio frequency apparatus playing function is provided, this detection method need not assembled under the intact situation and can detect computer audio device plays function at CD-ROM drive, and testing process does not need to limit the parts assembling procedure of production firm.
The object of the invention also is, whether the audio loop automatic testing method that provides a kind of computer audio equipment input port and output port to be constituted, this detection method specifically audio loop that every pair of input port and output port constituted of detection computations machine audio frequency apparatus be working properly.
The invention provides the method for the automatic detection computations machine of a kind of loop-type audio frequency apparatus playing function, this detection method comprises the steps:
The production standard audio file;
The input port and its output port that connect computer audio equipment to be detected;
Playing standard audio file on computer audio equipment to be detected is by the output port output audio signal of computer audio equipment to be detected;
The input port of computer audio equipment to be detected receives the sound signal of being exported by output port, and saves as the recording audio file on computers automatically;
Recording audio file and standard audio file are compared, judge whether recording audio file and standard audio file be identical, if recording audio file and standard audio file are not identical, this computer audio device plays dysfunction then;
If recording audio file and standard audio file are identical, then this computer audio device plays function is normal.
Wherein the step that recording audio file and standard audio file are compared also comprises recording audio file and standard audio file is carried out fast Fourier transformation algorithm (FastFourier Transform Algorithm, FFTA) computing.
The audio loop automatic testing method that the present invention also provides a kind of computer audio equipment input port and output port to be constituted, this detection method comprises the steps:
The production standard audio file;
The all input ports and its all output port that connect computer audio equipment to be detected;
Playing standard audio file on computer audio equipment to be detected is selected an output port output audio signal;
Select an input port to receive the sound signal of exporting by above-mentioned output port, and save as a recording audio file on computers automatically;
Above-mentioned recording audio file and standard audio file are compared, judge whether recording audio file and standard audio file be identical, if recording audio file and standard audio file are not identical, the audio loop work that then above-mentioned selected output port and above-mentioned selected input port constituted is undesired;
If recording audio file and standard audio file are identical, then the audio loop that above-mentioned selected output port and above-mentioned selected input port constituted is working properly;
Select other audio loop that output port and input port constituted of this computer audio equipment to be detected to detect.
Wherein the step that recording audio file and standard audio file are compared also comprises recording audio file and standard audio file is carried out the FFTA computing.
The present invention has the following advantages and effect:
1. the present invention adopts the automatic detection method of loop-type, the comparison of the broadcast of audio file, synchronization and audio file is carried out by computer automation fully, alleviated testing staff's burden, reduced human cost, and it can not limit the parts assembling procedure of production firm in testing process, need not can carry out the computer audio Equipment Inspection by the fixing disc driver;
2. when the present invention compares recording audio file and standard audio file, utilize FFTA to carry out computing, characteristics such as the vibration amplitude that audio file comprised that obtains and vibration frequency are carried out digitizing accurately compare, guarantee the accuracy of test;
3. both whether test computer audio frequency apparatus playing function was normal on the whole in the present invention, and whether the audio loop that every pair of input port and output port constituted that also can specifically detect audio frequency apparatus is working properly.
[description of drawings]
Fig. 1 is the computer hardware configuration diagram of the embodiment of the invention one.
Fig. 2 is the process flow diagram of the automatic detection computations machine of loop-type audio frequency apparatus playing function.
Fig. 3 is the computer hardware configuration diagram of the embodiment of the invention two.
Fig. 4 is the process flow diagram that detects the audio loop that output port and input port constituted.
[embodiment]
Embodiment one:
Present embodiment will describe whether test computer audio frequency apparatus playing function is normal on the whole in detail, and the computer audio equipment in the present embodiment has an input port and an output port.
As shown in Figure 1, be the computer hardware configuration diagram of the embodiment of the invention one.Computing machine 10 comprises computer stored equipment 11 and computer audio equipment 12, and this computer audio equipment has an input port 13 and an output port 14, and input port 13 is connected to form audio loop with output port 14 via call wire 15.Wherein computer stored equipment 11 is erasable storing medias, such as hard disc of computer or flash disk etc.In the present invention, computer stored equipment 11 can be used for storage standard audio file, recording audio file and standard audio file and the recording audio file carries out fast Fourier transformation algorithm (FastFourier Transform Algorithm, FFTA) the comparing result file after the computing.During computer audio equipment 12 audio plays, sound signal by input port 13 inputs, is recorded when then being implemented in broadcast via call wire 15 transmission by output port 14 outputs.
As shown in Figure 2, be the process flow diagram of the automatic detection computations machine of loop-type audio frequency apparatus playing function.At first need on computing machine 10, to make a standard audio file and be kept at computer stored equipment 11 (step S11).In the present embodiment, this standard audio file is the waveform audio file with constant frequency.Waveform audio file is also referred to as the file of WAVE form, promptly is to be the file of extension name with .wave.Because the audio frequency range that people's ear can be heard is 20 hertz-20,000 hertz, so the frequency that the standard audio file among the first embodiment of the invention and second embodiment all adopts needs within the audio frequency range that people's ear can be heard, testing result just has effective practical significance, for example adopts 5000 hertz frequency.In addition, waveform audio file is by the quality of sampling rate, position long, number of channel parameters such as (monophony or multichannel steregoes) decision sound, compare other format audio file such as midi format file or MP3 format file, waveform audio file can guarantee good audio data integrality aspect audio recording, therefore, waveform audio file can improve the accuracy of detection.
After the standard audio that the completes file, the input port 13 of computer audio equipment 12 is connected (step S12) with output port 14 with call wire 15.Make input port 13 and output port 14 and call wire 15 form an audio loop.
The standard audio file of making before playing on the computer audio equipment 12, sound signal is by output port 14 outputs (step S13).
Simultaneously, the input port 13 of control computer audio frequency apparatus 12 receives the sound signal of being exported by output port 14 by call wire 15, and saves as recording audio file (step S14) at computer stored equipment 11.
In the present embodiment, the action that control computer audio frequency apparatus 12 is carried out playing standard audio file, received audio signal and the sound signal that receives saved as the recording audio file, all tie up under Microsft Windows operating system (the Microsoft Windows OperatingSystem) environment, computer program calls multimedia control interface, and (MultimediaControl Interface, order MCI) is finished.For example, calling MCI_OPEN order opens computer audio equipment, calls the MCI_PLAY order and play, call MCI_RECORD order beginning to record, call MCI_SAVE_FILE order and the sound signal of recording is saved as a recording audio file and call the MCI_STOP order audio frequency apparatus of shutting down computer.
After audio recording is finished, recording audio file and standard audio file are carried out fast Fourier transformation algorithm (Fast Fourier Transform Algorithm, FFTA) computing (step S15), obtain recording audio file and standard audio file Oscillation Amplitude and characteristic such as vibration frequency separately and compare, judge recording audio file and standard audio file whether identical (step S16) according to comparison result.
If recording audio file and standard audio file are identical, judge that then this computer audio equipment 12 is by detecting the playing function of this computer audio equipment 12 normal (step S17), testing process end.
If recording audio file and standard audio file are not identical, judge that then this computer audio equipment 12 is not by detecting the playing function of this computer audio equipment 12 unusual (step S18), testing process end.
Embodiment two:
Whether present embodiment will be described the audio loop that every pair of input port and output port constituted that detects audio frequency apparatus in detail working properly, and the computer audio equipment in the present embodiment has a plurality of input ports and a plurality of output port.
As shown in Figure 3, be the computer hardware configuration diagram of the embodiment of the invention two.The computer hardware framework of present embodiment and the computer hardware framework of embodiment one are basic identical, and its difference is that the computer audio equipment 12 of present embodiment has two input ports 13 (A and B), and two output ports 14 (C and D).Each input port 13 (A and B) is connected by call wire 15 with all output port 14 (C and D), forms audio loop.
As shown in Figure 4, be the process flow diagram that detects the audio loop that output port and input port constituted.At first need on computing machine 10, to make a standard audio file (step S21).In the present embodiment, this standard audio file waveform audio file that is 5000 hertz of constant frequencies.
After the standard audio that the completes file, all input ports 13 of computer audio equipment 12 are connected (step S22) with all output port 14 with call wire 15.Thisly all input ports 13 of computer audio equipment 12 are connected with all output port 14 with call wire 15, be meant that each output port 14 all is connected to all input ports 13, and each input port 13 all is connected to all output ports 14.Each input port 13 and an output port 14 and call wire 15 form an audio loop, when computer audio equipment 12 displaying audio files, sound signal can be imported by an input port 13 via call wire 15 from an output port 14 outputs, thereby finishes audio recording automatically.
The standard audio file of making before playing on the computer audio equipment 12 is selected an output port 14 output audio signals (step S23).
Simultaneously, control computer audio frequency apparatus 12 selects an input port 13 to receive the sound signal of being exported by above-mentioned output port 14 by call wire 15, and saves as a recording audio file (step S24).
In the present embodiment, the action that control computer audio frequency apparatus 12 is carried out playing standard audio file, received audio signal and the sound signal that receives saved as the recording audio file, all tie up under Microsft Windows operating system (the Microsoft Windows OperatingSystem) environment, computer program calls multimedia control interface, and (MultimediaControl Interface, order MCI) is finished.For example, calling MCI_OPEN order opens computer audio equipment, calls the MCI_PLAY order and play, call MCI_RECORD order beginning to record, call MCI_SAVE_FILE order and the sound signal of recording is saved as a recording audio file and call the MCI_STOP order audio frequency apparatus of shutting down computer.
After audio recording is finished, recording audio file and standard audio file are carried out fast Fourier transformation algorithm (Fast Fourier Transform Algorithm, FFTA) computing (step S25), obtain recording audio file and standard audio file Oscillation Amplitude and characteristic such as vibration frequency separately and compare, judge recording audio file and standard audio file whether identical (step S26) according to comparison result.
If recording audio file and standard audio file are identical, then judge the audio loop (step S27) working properly that above-mentioned selected output port 14 and selected input port 13 are constituted.
If recording audio file and standard audio file are not identical, then judge the audio loop work undesired (step S28) that above-mentioned selected output port 14 and selected input port 13 are constituted.
Judge whether to need to select other output port 14 and input port 13 of this computer audio equipment, carry out audio loop and detect (step S29).Select other output port 14 to carry out the audio loop detection if desired, then turn back to step S23 with input port 13; If do not need to select other output port 14 and input port 13 to carry out audio loop detection, then detection of end.
Claims (4)
1. the method for the automatic detection computations machine of a loop-type audio frequency apparatus playing function is characterized in that this detection method comprises the steps:
The production standard audio file;
The input port and its output port that connect computer audio equipment to be detected;
Playing standard audio file on computer audio equipment to be detected is by the output port output audio signal of computer audio equipment to be detected;
The input port of computer audio equipment to be detected receives the sound signal of being exported by output port, and saves as the recording audio file on computers automatically;
Recording audio file and standard audio file are compared, judge whether recording audio file and standard audio file be identical, if recording audio file and standard audio file are not identical, this computer audio device plays dysfunction then;
If recording audio file and standard audio file are identical, then this computer audio device plays function is normal.
2. the method for the automatic detection computations machine of loop-type as claimed in claim 1 audio frequency apparatus playing function, it is characterized in that, wherein the step that recording audio file and standard audio file are compared also comprises recording audio file and standard audio file is carried out the fast Fourier transformation algorithm computing.
3. the audio loop automatic testing method of computer audio equipment input port and output port is characterized in that this detection method comprises the steps:
The production standard audio file;
The all input ports and its all output port that connect computer audio equipment to be detected;
Playing standard audio file on computer audio equipment to be detected is selected an output port output audio signal;
Select an input port to receive the sound signal of exporting by above-mentioned output port, and save as a recording audio file on computers automatically;
Above-mentioned recording audio file and standard audio file are compared, judge whether recording audio file and standard audio file be identical, if recording audio file and standard audio file are not identical, the audio loop work that then above-mentioned selected output port and above-mentioned selected input port constituted is undesired;
If recording audio file and standard audio file are identical, then the audio loop that above-mentioned selected output port and above-mentioned selected input port constituted is working properly;
Select other audio loop that output port and input port constituted of this computer audio equipment to be detected to detect.
4. the audio loop automatic testing method of computer audio equipment input port as claimed in claim 3 and output port, it is characterized in that, wherein the step that recording audio file and standard audio file are compared also comprises recording audio file and standard audio file is carried out the fast Fourier transformation algorithm computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051837 CN1758226A (en) | 2004-10-09 | 2004-10-09 | The method of the automatic detection computations machine of loop-type audio frequency apparatus playing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051837 CN1758226A (en) | 2004-10-09 | 2004-10-09 | The method of the automatic detection computations machine of loop-type audio frequency apparatus playing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1758226A true CN1758226A (en) | 2006-04-12 |
Family
ID=36703614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410051837 Pending CN1758226A (en) | 2004-10-09 | 2004-10-09 | The method of the automatic detection computations machine of loop-type audio frequency apparatus playing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1758226A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373455B (en) * | 2007-08-24 | 2010-07-28 | 英业达股份有限公司 | Device and method for testing sound input and output of voice card |
| CN101729635B (en) * | 2009-12-30 | 2013-12-04 | 中兴通讯股份有限公司 | Method and device for testing audio loop of communication terminal |
| CN103729274A (en) * | 2013-12-31 | 2014-04-16 | 广州华多网络科技有限公司 | Method and system for detecting audio faults |
| CN104661169A (en) * | 2013-11-25 | 2015-05-27 | 深圳中电长城信息安全系统有限公司 | Audio testing method and device |
| CN105810222A (en) * | 2014-12-30 | 2016-07-27 | 研祥智能科技股份有限公司 | Defect detection method, device and system for audio equipment |
| CN105898555A (en) * | 2015-12-28 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Audio abnormity positioning method and device |
| CN108430026A (en) * | 2018-03-07 | 2018-08-21 | 广州艾美网络科技有限公司 | Audio frequency apparatus fault detection method and program request equipment |
| CN109462451A (en) * | 2018-11-24 | 2019-03-12 | 合肥龙泊信息科技有限公司 | There is the emergency broadcase system of terminal monitoring function when a kind of audio broadcasting |
| CN109525341A (en) * | 2018-11-24 | 2019-03-26 | 合肥龙泊信息科技有限公司 | There is the emergency broadcase system of terminal monitoring function when a kind of teletext |
| CN110300211A (en) * | 2019-05-17 | 2019-10-01 | 合肥移瑞通信技术有限公司 | A kind of test method and system of automatic detection uplink and downlink voice |
| CN110390954A (en) * | 2019-08-06 | 2019-10-29 | 京东方科技集团股份有限公司 | Method and device for evaluating quality of voice product |
| CN111050265A (en) * | 2019-11-27 | 2020-04-21 | 深圳易科声光科技股份有限公司 | Automatic audio link detection method and device |
| CN112492453A (en) * | 2019-09-12 | 2021-03-12 | 深圳市德晟达电子科技有限公司 | Automatic detection method for audio interface |
| CN112689872A (en) * | 2018-11-21 | 2021-04-20 | 深圳市欢太科技有限公司 | Audio detection method, computer-readable storage medium and electronic device |
| CN113596695A (en) * | 2021-06-30 | 2021-11-02 | 惠州高盛达科技有限公司 | Automatic detection method and system for double MEMS microphones based on FFT algorithm |
| CN114679676A (en) * | 2022-04-12 | 2022-06-28 | 重庆紫光华山智安科技有限公司 | Audio device testing method and system, electronic device and readable storage medium |
-
2004
- 2004-10-09 CN CN 200410051837 patent/CN1758226A/en active Pending
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373455B (en) * | 2007-08-24 | 2010-07-28 | 英业达股份有限公司 | Device and method for testing sound input and output of voice card |
| CN101729635B (en) * | 2009-12-30 | 2013-12-04 | 中兴通讯股份有限公司 | Method and device for testing audio loop of communication terminal |
| CN104661169A (en) * | 2013-11-25 | 2015-05-27 | 深圳中电长城信息安全系统有限公司 | Audio testing method and device |
| CN104661169B (en) * | 2013-11-25 | 2018-11-06 | 深圳中电长城信息安全系统有限公司 | A kind of audio testing method and device |
| CN103729274A (en) * | 2013-12-31 | 2014-04-16 | 广州华多网络科技有限公司 | Method and system for detecting audio faults |
| CN105810222A (en) * | 2014-12-30 | 2016-07-27 | 研祥智能科技股份有限公司 | Defect detection method, device and system for audio equipment |
| CN105898555A (en) * | 2015-12-28 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Audio abnormity positioning method and device |
| CN108430026B (en) * | 2018-03-07 | 2020-08-21 | 广州艾美网络科技有限公司 | Audio equipment fault detection method and karaoke equipment |
| CN108430026A (en) * | 2018-03-07 | 2018-08-21 | 广州艾美网络科技有限公司 | Audio frequency apparatus fault detection method and program request equipment |
| CN112689872A (en) * | 2018-11-21 | 2021-04-20 | 深圳市欢太科技有限公司 | Audio detection method, computer-readable storage medium and electronic device |
| CN109525341A (en) * | 2018-11-24 | 2019-03-26 | 合肥龙泊信息科技有限公司 | There is the emergency broadcase system of terminal monitoring function when a kind of teletext |
| CN109462451A (en) * | 2018-11-24 | 2019-03-12 | 合肥龙泊信息科技有限公司 | There is the emergency broadcase system of terminal monitoring function when a kind of audio broadcasting |
| CN110300211A (en) * | 2019-05-17 | 2019-10-01 | 合肥移瑞通信技术有限公司 | A kind of test method and system of automatic detection uplink and downlink voice |
| CN110300211B (en) * | 2019-05-17 | 2021-10-12 | 合肥移瑞通信技术有限公司 | Test method and system for automatically detecting uplink and downlink voice |
| CN110390954A (en) * | 2019-08-06 | 2019-10-29 | 京东方科技集团股份有限公司 | Method and device for evaluating quality of voice product |
| CN110390954B (en) * | 2019-08-06 | 2022-05-13 | 京东方科技集团股份有限公司 | Method and device for evaluating quality of voice product |
| CN112492453A (en) * | 2019-09-12 | 2021-03-12 | 深圳市德晟达电子科技有限公司 | Automatic detection method for audio interface |
| CN111050265A (en) * | 2019-11-27 | 2020-04-21 | 深圳易科声光科技股份有限公司 | Automatic audio link detection method and device |
| CN111050265B (en) * | 2019-11-27 | 2021-09-14 | 深圳易科声光科技股份有限公司 | Automatic audio link detection method and device |
| CN113596695A (en) * | 2021-06-30 | 2021-11-02 | 惠州高盛达科技有限公司 | Automatic detection method and system for double MEMS microphones based on FFT algorithm |
| CN114679676A (en) * | 2022-04-12 | 2022-06-28 | 重庆紫光华山智安科技有限公司 | Audio device testing method and system, electronic device and readable storage medium |
| CN114679676B (en) * | 2022-04-12 | 2023-05-26 | 重庆紫光华山智安科技有限公司 | Audio device testing method, system, electronic device and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1758226A (en) | The method of the automatic detection computations machine of loop-type audio frequency apparatus playing function | |
| CN101089641B (en) | Method, system for implementing audio-frequency equipment test | |
| Mauch et al. | The audio degradation toolbox and its application to robustness evaluation | |
| CN1728237A (en) | Eliminate the apparatus and method of noise from recording unit | |
| CN1877517A (en) | Audio data processing apparatus and method to reduce wind noise | |
| CN104244161A (en) | Method and device for testing equipment with voice playing function and voice recording function | |
| CN101448186B (en) | System and method for automatic regulating sound effect of a loudspeaker | |
| CN101608947A (en) | Sound testing method | |
| CN104754094A (en) | Mobile terminal motor testing method and system | |
| US20080281599A1 (en) | Processing audio data | |
| CN1777265A (en) | Image-sound synchronous recording and playing method | |
| CN109658951A (en) | Mixed signal detection method and system | |
| CN1777336A (en) | Method and apparatus to automatically set speaker modes in a multi-channel speaker system | |
| CN112492453A (en) | Automatic detection method for audio interface | |
| CN1457216A (en) | Digital set style echo effect decoder | |
| CN108428457B (en) | Audio duplicate removal method and device | |
| CN1623151A (en) | Music retrieval system for joining in with the retrieved piece of music | |
| CN1260729C (en) | Method for automatically detecting computer CD audio frequency play function | |
| WO2020148246A1 (en) | Device, method and computer program for blind source separation and remixing | |
| CN1317709C (en) | Defect signal detecting apparatus for optical recording/reproducing apparatus and defect signal detecting method thereof | |
| CN102435303B (en) | Audio test method | |
| CN115767337A (en) | Failure detection method, device, equipment and medium for digital microphone | |
| CN1150513C (en) | Speed changeable voice signal regenerator | |
| CN103686580A (en) | Automatic test method and device for multi-path audio output interface | |
| CN1553597A (en) | Audio frequency synchronous aligning testing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |