GRAS测量传声器组合详细介绍

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GRAS测量传声器组已组合，以满足我们用户的典型测量需求。独立于您的测量系统和应用程序，您应该能够找到一套适合您的需要。麦克风组可直接连接到所有专业测量系统，如图所示，它们可用于CCP和7针LEMO输入。
如果您的测量平台支持符合IEEE1451.4（TEDS）的智能传感器，您可以简单地插入麦克风，它们将用它们的特定属性、类型和校准数据来标识自己。多渠道用户特别喜欢的功能。
CCP设备使用高质量同轴电缆，而LEMO设备使用特殊的软型多芯屏蔽电缆。如果要使用延长电缆，应考虑对高频和动态范围的可能影响。
GRAS所有话筒组件均作为一个单元交付，并进行相应校准。成套设备交付时附有校准图表，包括整套设备的灵敏度值和频率响应曲线。因此灵敏度值可以直接在系统设置中使用。
为了经常验证测量链，需要一个声源。GRAS为此提供了一个114分贝的声音校准器。根据使用和您的内部质量控制要求，我们建议至少每两年重新校准一次装置。为了更准确的验证，我们建议使用*枪式扩音器进行校准。GRAS提供114db和134db*枪式话筒。此外，我们建议根据可靠的参考校准声源。GRAS提供校准服务，并建议每两年进行一次校准。
选择麦克风设置或从麦克风指南获取指导。
Measurement microphone sets
The measurement microphone sets have been combined so they fulfil our users’ typical measurement needs. Independently of your measurement system and application you should be able to find a set that suits your needs. The microphone sets can be connected directly to all professional measurement systems and as indicated they are available for both CCP and 7-pin LEMO inputs.
If your measurement platform supports intelligent transducers according to IEEE 1451.4 (TEDS) you can simply plug in the microphones and they will identify themselves with their specific properties, types and calibration data. A feature especially appreciated by multi-channel users.
The CCP sets use high-quality coaxial cables, whereas the LEMO sets use a special, soft type of multicore shielded cable. If extended cables are to be used you should consider the possible influence on the upper frequency and dynamic ranges.
All microphone sets are delivered as a unit and are calibrated accordingly. The sets are delivered with calibration charts including sensitivity values and frequency response curves for the complete set. The sensitivity value can therefore be used directly in your system setup.
For frequent verification of the measurement chain a sound source will be required. GRAS supplies a 114 dB sound calibrator for this purpose. Depending on the use and your internal quality control requirements we recommend that the sets are recalibrated at least every second year. For a more accurate verification we recommend calibration with a pistonphone. GRAS supplies 114dB and 134dB pistonphones. Further, we recommend calibration of the sound sources against an extreme reliable reference. GRAS offers calibration services and recommends such calibration every second year.