SoundCheck测试系统 - 测量、试验及标准室 - 声学楼论坛

SoundCheck是一套模块化基于PC的电声测试系统,它能高性能地完成电声产品各种参数的测试。无论对于生产线质量控制(QC)简易操作的要求,还是对研发（R&D）应具备各种扩展功能的要求,Soundcheck都能很好的满足并适用于整个设计和生产过程。通过在标准的PC上使用专业的声卡,Soundcheck确实是作为传统电声检测设备硬件更好更新的替换品。

性能：

1、

较低的初始成本

2、

最小的维修费用

3、

简单划算的产品升级

4、

节省空间，携带方便

5、

定制简单方便

6、

与其他的软件一体化

7、

R&D与产品环境的共同操作平台

8、

远程的产品支持

测试产品包括：

1、	扬声器
2、	麦克风
3、	电话机和手机
4、	助听器
5、	耳机和通讯装置
6、	电子元件

连接工程和制造业

在理想状态中,生产线测试能够在不影响生产的情况下完成如同工程测试一样的实验。这些测试应该操作简单,不给操作者留下犯错的机会。每个工厂都会有不合格产品,但是这些产品应该根据它们的不同缺陷而被分类。这相当于你把整个测试实验室装在一个公文包里去见客户。工程和生产测试本应该有100%兼容测试方法和数据库。一旦出现任何问题,你的工程师将能迅速对生产线结果进行高级分析。

生产线数据能够从你的生产车间传送到在世界另一端的R&D实验室。那些可以提供数据的系统应能在任何一台个人计算机上运行,并能轻易进行维护和升级。尽管没有任何事情是完美无缺的,但是Soundcheck 将带你进入前所未有的完美进界。Soundcheck可被用于以下所有贯穿产品生命周期的电声和电子测试：
1、快速测试和描绘原型设计
2、有效的界定采购商和供应商
3、从工程到生产的简单转换
4、在流水线上对产品性能的完全检测
5、不断提高产品质量
Soundcheck 通过使用专业声频PCI、PCMCIA、USB或者IEE1394声卡在计算机的上运行发生信号和获取速据,刺激的频率范围和分析反映只是被声卡的取样频率所限制。唯一的硬件是声卡和计算机，它们升级都很简单并且花费较少。你不会被个人私有硬件的大小、花费和复杂性所拘泥。

SoundCheck不但适用于要求严格的研发实验室,同样也适用于生产线。它可以被安装在生产线上完成详细的检测,而且给出通过检查或是不合格的结果。

这个通用测试台所提供的多项优势将被融汇于您的设计和生产流程之中。

R&D,QC,QA 的共有平台

Soundcheck对研发工程师来说是一种有效工具。它使用有效的测量法则,能确保在大约几秒钟内对频响、相位、灵敏度、失真、指向性、阻抗、蜂音和Thiele-Small参数做出快速测量。在单独测试中,它能完成检测,数据分析,还能与预先测定的限定做结果比对。软件组合可形成一系列预先编制的测试程序,且这些程序与可无限扩展的工业标准相一致。包括有：TIA、ANSI、IEEE和ITU等等。

通过使用Soundcheck的独特的可视脚本工具,制定检测顺序就变得简单了,而且不需要程序知识,因为那些简单的界面使复杂的测试建立一定模式的流程图,在测试或是在分析程序的每一步都可以简单的选择设定好程序或是使用者规定选项,简易的测试程序保证整个程序简单到只须用鼠标轻点设置键就能完成测试,从而可以重复检测。

数据可以被输出到用户的Soundcheck报告上,或者被发送到像微软的Word 或Excel等软件包和微软的Access或Oracle用于存档处理或是报告,Soundcheck可以使用美国国家仪器有限公司的测试标准)或是在Active X®的运作环境整合于较大的测试应用软件。

为了满足平台化的测试要求,Soundcheck构建了一个完整的虚拟声频测试台,其中包括一个手动信号发生器万用表,示波镜,频谱分析仪和一个实时分析仪,这样就避免了购买独立的仪器。
工程测试试验的发展成果很容易转换到生产中去,Soundcheck高级的运算法则甚至可以在极度吵闹的环境中进行高速准确的测试,一步接一步的简单的屏幕显示可通过校准,上下限和测试设置引导用户。软件可被配置为一点击就能完成普通测试的模式－操作者只用简单的在预编程序单中选出相应的生产模式和测试,声检测就能执行测试,分析数据并与预先定义的通过/失败限定进行结果比对。对不同操作者控制水平的设置能避免对测试次序的修改。声检测甚至可以整合于PLCs,条形码系统和外部硬件和软件系统。

生产线经不起停产,soundcheck从根本上解决了这个问题。自从Soundcheck使用了Windows,一种PC和专业的音频声卡取代了昂贵的私人拥有的DSP卡,或者Front-end电子学,这些代用品就容易购买,维护成本较底.如果出现问题,用户自己可随意通过网上移动诊段立即获取援助使其恢复运转。同时,虚拟实验室将在全球各地兴建,这使得生产设备即使身在万里之遥，也可以进行与研发部门相同的测试。由于软件语言的多种选择和互联网传递数据的使用,它的使用非常广泛。它甚至可以使管理人员实时观察来自不同大陆的生产线监测数据。

声检测通过使用与研发实验室相同的测试对客户的样品进行测试。从声检测能在笔计本电脑上运行以后,用户就如同有便携的实验室音频测试站一样,能让轻易执行在线监控。

有关电声测试系统的摘要
研发中心-全面的测试能力
	强大的测量计算法则
	标准及用户自定义测试
	与其他电脑应用软件进行灵活的数据输出和整合
	虚拟音频测试台
质量保证-客户审合
	公事包中完善的测试实验室
	在线进行与研发实验室里相同的测试
	为其他线下分析提供已存档的结果
质量控制-生产线
	屏幕上显示操作步骤
	一点击便可进入测试状态
	自动比对到事先定义的通过/失败限制
	操作访问的指定准则
	可与程序逻辑控制系统和条形码系统整合

扬声器测试和测量应用
有了声检测，你将不再拘泥于仅使用受专利技术限制的那些基于硬件的测试系统进行检测。声检测是一个基于Windows

操作系统的现代化扩音器测试系统。通过使用强大的测试运算法则，声检测能完成精确的测试，例如：在几秒内就能完成频响，相位，敏感度，失真，摩擦和蜂音，电阻抗，方向特性和Thiele-Small参数的检测。测试数据和结果能输出到其他程序做进一步处理，并生成标准化文件。此外，声检测还能轻易整合于使用ActiveX（微软网络化多媒体对象控制技术）和National Instruments LabVIEW

（美商国家仪器的图形化开发环境技术）的现有测试程序当中。

SoundCheck Virtual Audio Test Bench
Manual Signal Generator
• Variable frequency and amplitude sine wave excitation via key board or virtual knobs
• Play any selected WAV file at a user-defined level
• Equalize any selected WAV file at a user-defined level
Multimeter
• Real-time monitoring of overall RMS levels (e.g. volts, SPL, ohms, etc.)
• Selectable averaging time
• Max hold
• Selectable Max/Min values with Pass/Fail indication
Oscilloscope
• Waveform peak detection
• Delta cursor
• Selectable zoom
Spectrum Analyzer
• FFT and DFT with any number of lines
• Hanning, Hamming, Blackman-Harris, and Flat top windows
• Max hold
• Selectable averaging time (Linear & Exponential)
• Selectable triggering
• Pure tone frequency and amplitude extraction
• Delta and Harmonic cursor with THD readout
• Power averaging
• Selectable zoom
Real-Time Analyzer
• 1/1, 1/3, 1/6, 1/12, 1/24 octave filters with true digital recursive filters
• A, B, and C weighting filters
• Complies with ANSI S1.11 and IEC 1260
• Max hold
• Exponential and linear time averaging including fast and slow sound level meter response

Hardware
• Modify sound cards settings, such as bit depth and sampling rate; select communication mode with peripheral devices including RS-232,GPIB (IEEE-488), DC Connect™ programmable DC power supply and measuring amplifier, and digital I/O cards; No limitation on number of external interfaces used.
Calibration
• User-defined units and transducer sensitivities enable SoundCheck to measure any dynamic signal. SoundCheck can be calibrated with external, absolute source including acoustic, vibration, or voltage. SoundCheck will correct for amplitude and phase of input and output devices (e.g. microphones and amplifiers). If the output device is an acoustic source, (e.g. loudspeaker, mouth simulator), SoundCheck can automatically equalize any test signal including complex signals.
Messages
• Message steps initiated based on Pass/Fail conditions
• Display text message in local language, input numeric values, Yes/No dialog
• Digital I/O
• IEEE-488
• RS-232
Stimulus
• Stimuli type include stepped sine sweep (STWEEP™), amplitude sweep, WAV file, DC, and continuous log sweep (used in conjunction with optional Time Selective Response analysis algorithm)
• Stweep step size includes 1/3, 1/6, 1/12, and 1/24 octave; user-defined linear and log
Acquisition
• Play & Record, or any combination of Signal Generator, Multimeter, RTA, and FFT
• Capture response time waveform as a WAV file
Analysis
• Amplitude values in linear units (e.g. volts, Pascals, etc.) or dB
• Envelope of response time waveform
• Impedance curves
• Autodelay to automatically compensate for delay between input and output
• Manually enter delay in milliseconds, centimeters, or inches
• Broadband RMS to measure unfiltered level of an AC or DC signal
• Spectrum calculates the FFT of the response waveform
• Time Selective Response to measure free-field and impulse response of fundamental AND harmonics
• Heterodyne to measure frequency and phase response only
• HarmonicTrak™ Algorithm power sums a range of user-selected harmonics including sub-harmonics; no limit to number of harmonics
• Frequency and phase response including harmonic amplitude and phase

• Classic THD and Rub & Buzz
• Normalized THD and Rub & Buzz distortion (harmonics compared to amplitude of fundamental at measured frequency)
• THD + Noise
• Relative or absolute response
• Loose particle detection
Recall
• Automatically recall data or results
Post-processing
• Addition, subtraction, multiplication, division, offset by constant (X, Y, or Z dimensions), change sign, reciprocal, absolute value, square, square root, exponential, logarithm, average, maximum, minimum, estimated resonance and notch
• Search range to find intersection of two curves (e.g. -3dB points of crossover network)
• Curve smoothing with 1/3, 1/6, 1/12, and 1/24 octave or user-defined linear or log resolution
• Loudness rating according to IEEE and ITU-T; example sequences for TIA and other industry standards included
• Attack & Release time calculates the time for the response signal to rise or decay, respectively, by a user-defined amplitude in dB or linear units
• Equation editor
• Thiele-Small parameters using added mass or added volume
• Any number of equations can be combined
• Variables can be given user-defined descriptive names (e.g. Qms for speaker Q with added mass)SoundCheck Step Editors
Statistics
Real-time updates of:
• Overall yield
• Yield for an individual test (e.g. sensitivity)
• ± x sigma of any measured curve, result, yield, or calculated value
• Max, min, and mean of any measured curve, result, yield, or calculated value
Limits
• Limits applied to any measured curve, value, or calculated value
• Upper only, lower only, upper and lower
• Limits can be entered manually, recalled from a file, offset a curve or portion of the curve by user-defined amount (e.g. ±3 dB), or changed graphically by "dragging" limit points using mouse
• Floating, absolute, align to a point (e.g. 1 kHz aligned to 0 dB), individual points
• X axis can be "floated"
Display
• Multiple displays can be placed on the screen to view curves, single values, and test results with PASS/FAIL indicators; display layout can be transferred to Word or as HTML document; curves

Optional Hardware (Separate data sheets available)
Professional Audio Sound Card
For measurements up to 40 kHz - PCI, 96 kHz sampling rate, 24 bit, balanced 2 in/2 out, 110dB dynamic range and Digital I/O
For measurements up to 100 kHz - PCI, 215 kHz sampling rate, 24 bit, balanced 4 in/4 out or 2 in/6 out or 6 in/2 out, 117dB dynamic range and Digital I/O
For laptop measurements - PCMCIA, 48 kHz sampling rate, 24 bit, balanced 2 in/2 out or 4 in/4 out, 94dB dynamic range, Digital I/O, and headphone output
* Ask Listen for details on latest available sound cards, specifications and drivers
SCM Measurement Microphones
• Cartridge Type: Prepolarized condenser element, vertical diaphragm
• Directional characteristics: Omni-directional
• Frequency Response: 20 Hz - 20 kHz ± 2 dB
• Nominal Sensitivity: 6 mV/Pa (SCM-1) and 20 mV/Pa (SCM-2)
• Equivalent Noise Level: 26 dBA (SCM-1) and 23 dBA (SCM-2)
• Max SPL: 144 dB (SCM-1) and 134 dB (SCM-2)
• Distortion: 123 dB SPL peak (<1% THD)
• Operating Temperature range: -30 to +70°C (-22 to 158 °F)
• Operating Humidity range: 0 to 100 % RH (without condensation)
• Output impedance: 30 - 40 Ohms (built- in preamplifier)
• Cable drive capability: Up to 300m(-0.2V at 20 kHz with 114 dB SPL) using ICP®
• Dimensions: Length: 9.3 cm (3.6 in) Diameter: 5.4 mm (0.21 in)
• Cable: 1.75 m (5.75 ft)
• Connector: 7-pin Lemo
• Weight: ~ 14 grams (0.5 ounces)
• Accessories: Wind screen, calibrator, microphone holder, extension cable
SoundConnect Microphone Power Supply
• Input connectors: BNC in parallel with B&K 7-pin preamplifier or optional Lemo
• Output connectors: BNC on front panel in parallel with RCA phono on rear panel
• Frequency range: 20 to 100 kHz ± 0.1 dB (-3 dB at 5 Hz and 200 kHz)
• Gain: -20 to 60 ± 0.2 dB in steps of 20 ± 0.1 dB

• Preamplifier supply: 120V @ 2mA single or ± 14V dual
• Input noise: <1.8μVRMS (A-weighted),<3.0μVRMS (20 - 20 kHz), @ 20 to 60 dB
• Total Harmonic Distortion: < 0.003%
• Microphone polarization voltage: 0, 28, 200 V ± 1%, stability better than 0.5% for ±10% variations in mains-voltage
• Input impedance: 1 MΩ
• Output impedance: 600Ω
• Output attenuator: 0 dB (7.07 VPeak), -8 dB (2.82 VP), -14 dB (1.41 VP)
• ± 0.1 dB
• Peak level meter: Indication at -20, -10, 0 dB, and overload relative to selected output range ± 0.5 dB.
• Power requirements: 115/230 V AC ±10% switchable, 50 to 60 Hz,
• detachable IEC power cord
• Dimensions: 5.5" (139.7 mm) H, 2.5" (63.5 mm )W, 7.5" D (190.5 mm)
• Weight: 2 lbs. (910 g)
DC Connect – DC Power Supply and Monitor
• Connected in place of a battery, measure the current drawn from the battery
• Test a device over the voltage descent of a battery's lifetime
• Measure resistance, typically using the current source mode
• Apply a voltage or current ramp
• Acquire the I-V characteristic curve of a device
• Measure current draw synchronized with an audio stimulus
• Acquire a current draw vs. audio level curve
• Measure the dynamic response of current draw to a step in audio level
• Monitor test point voltages
• USB or sound card control
• Current limiting
• ±10V with 1mV resolution
• 3 to 300mA with 0.1mA resolution
Optional Accessories
• Remote footswitch & buzzer (includes RS-232 serial interface)
• Bar code reader
• Measurement microphones
• Preamplifiers
• Calibrators
• Artificial ears
• Artificial mouths