GRAS 146AE 1/2" CCP Free-field Measurement Microphone Set
The GRAS 146AE is a 1/2" free-field measurement microphone set for measurements in extreme environments. It is terminated with a BNC connector and is optimzed for use under rough conditions at temperatures from -40 to 125°C. It provides accurate data under the most challenging conditions - it can resist shock, vibration, water, dust and extreme temperatures.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 18 dB(A) to 133 dB
Sensitivity: 50 mV/Pa
Temperature: -40 to +125°C
Humidity: 10 – 90%
IP67
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Product Overview
It´s all about reliable data!
Valid data and efficient test methods have always been important in acoustic noise, vibration and harshness (NVH) testing, but the need for better test methods and more reliable data has never been greater. New types of cars – electric, hybrid, autonomous – pose new challenges and call for new, informed and clever trade-off decisions. Add to this, the constant push for shorter time to market and more efficient NVH test methods - more urgently than ever before.
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. 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.
The focus has been on ensuring that the 146AE measurement microphone performs in real-life conditions. Ideal for engine compartment measurements, transmissions, exhaust and brake noise tests. These conditionas are all verified during our Highly Accelerated Lifetime Test (HALT). Watch the video about HALT test for GRAS 146AE here.
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.
Our answer is the 146AE - the measurement microphone set that is so rugged and well protected that it can be trusted as your standard measurement microphone for the broadest range of automotive noise, vibration and harshness (NVH) measurements - all without compromising measurement quality.
Product Features
- Shock-absorbing Design
The innovative design is prepared for daily use in rough testing conditions. The occasional drop or shock in the dynamometer, on proving grounds or on public roads does not affect the performance of the measurement microphone, which always delivers reliable data.
- Waterproof
Can safely be used in wet and splashy conditions. The measurement microphone preamplifier housing is certified watertight according to IP67.
- Extreme Temperature Performance
Optimized for extreme temperatures - from -40 to 125 ºC (-40 to 257 ºF) without impacting sensitivity. It is the most temperature-stable CCP measurement microphone on the market.
- Random-incidence Corrector
With the RA0357 Random-incidence Corrector, it is possible to quickly change the response from free-field to random-incidence.
- Water, Oil and Dust-resistant and Replaceable Grid
A grid with built-in filter allows for use in heavily contaminated environments and is easy to replace.
- Protected Venting
Dual, waterproof venting prevents moisture from blocking the venting and ruining your measurements.
- Power-on Indicator
Visual confirmation of status and transducer electronic data sheets (TEDS) reading during power-up ensures efficiency and readiness for data collection.
- Online Calibration Data
Calibration data for each specific measurement microphone can be accessed at gras.dk/e-data.
- Waterproof Connection
Waterproof connection and cabling ensure data integrity and surviveability during outdoor tests in all climate zones and weather conditions.
Product Applications
The new standard NVH measurement microphone
Flexible to meet your many measurement needs
The 146AE is a rugged free-field measurement microphone set for all acoustic applications where the microphone can be pointed directly at the sound source.
Using different microphones for various measurement points can result in inconsistent data and complex test setups. With the 146AE measurement microphone you can use the same microphone at high temperatures, in high humidity or under dusty conditions (free-field as well as randomincidence). This optimizes efficiency and saves you time setting up and evaluating your entire test setup.
High precision ensures valid data in challenging measurement positions
The consequences of inaccurate or incorrect data can be disastrous, especially, if identified late in your test sequence. The unmatched stability of the 146AE measurement microphone, the unique power-on feature as well as on-line calibration data mean that you can trust the accuracy of data from all your measurement positions.
Rugged design makes it ideal for all NVH test conditions
The 146AE measurement microphone is designed for real-life use. This includes conditions where the microphone is exposed to high temperatures, water and dust as well as daily handling with the risk of vibrations, drops and other kinds of shocks.
The microphone is ideal for the test track as well as the dynamometer and is less affected by most typical problems related to testing in changing weather conditions or when moving vehicles between different facilities. Whether your challenge is brake noise, powertrain noise, exhaust noise, buzz, squeak and rattle noise, vehicle interior noise, road noise or pass-by noise, the 146AE measurement microphone is the solution.
Low cost of ownership
Its extended lifetime ensures low cost of ownership and improves overall performance.
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