Automotive noise testing can be extremely demanding, so you need a robust solution to meet your expectations. This is why GRAS has developed the 146AE - a measurement microphone specially designed to perform under realistic test conditions.
汽车噪声测试要求极高，因此您需要一个强大的解决方案来满足您的期望。这就是GRAS设计 和开发了146AE的原因 -- 一种专门用于真实测 试条件下使用的测量麦克风。
Setting up multichannel measurement systems many times a day exposes your microphones to shock and drop. It is important that your test systems are protected against vibrations, extreme temperatures, high humidity, dust and even oil mist.
To enable efficient testing you also have to trust that your microphones are ready and working when you roll a vehicle into the test chamber – and confident that your data is accurate when you roll it out again. Retesting or rescheduling is a costly option.
为了实现高效测试，您必须拥有值得信赖的麦克风。当您将车辆推入测试室时，您要确保麦克风已经准备就绪并且运作正常 – 而当车辆推出测试室 时，您要再次确信您的数据是准确的。 不然重新测试或重新安排是一个非常昂贵的选择。
Our answer is the 146AE - the measurement microphone set that is so rugged and well protected that it can be trusted as your standard microphone for the broadest range of automotive noise, vibration and harshness (NVH) measurements - all without compromising measurement quality.
我们的解答是146AE—这款麦克风非常坚固且受到 良好保护，因此可以作为标准麦克风用于最广泛的 汽车噪声、振动和粗糙度（NVH）的测量 - 所有以上 的原因都不会影响测量质量。
GRAS 146AE 自由场麦克风
Freq range (频率范围) : 3.15 Hz to 20 kHz
Dyn range (动态范围 ): 18 dB(A) to 133 dB
Sensitivity (灵敏度): 50 mV/Pa
Temperature (使用温度) : -40 to +125°C (-40 至 257 °F)
Humidity (湿度): 0 – 90%
The 146AE is a free-field microphone set designed for use in rough conditions such as NVH testing in the automotive industry.
It is specifically designed for applications such as 它专为以下应用而设计:
-Engine noise testing 发动机噪声测试
-Acoustic performance testing 声学性能测试
-Pass by noise testing 通过噪声测试
-Powertrain NVH noise 动力总成引起的噪声测试
-Exhaust Noise 排气噪声
-Computer Model Validation/CAE validation 计算机模型验证/ CAE验证
-Accelerated Life Cycle Testing 加速生命周期测试
-Buzz, Squeak and Rattle Noise 异响测试
-Vehicle Interior Noise 车辆内部 NVH 测试
-Road Noise 路面噪声
-Brake Noise 制动噪声
-Testing at temperatures up to 125°C 可在高达125°C的温度下进行测试
With the new rugged automotive microphone, we have elaborated our HALT test to reflect the harsh environments and conditions in NVH measurements.
NVH measurement conditions
Strong vibrations, shock, drop, extreme temperatures and wet or dusty conditions are all par for the course for a automotive microphone. And at the end of the day you need to be confident that you have valid data, reliable repeatability and minimal downtime or re-tests.
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