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Bruel & Kjr UK

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Dassault Aviation Uses Bruel & Kjaer Noise Data Acquisition System for Falcon 8X Business Jet Certification Program

Dassault Aviation has performed noise certification tests on their new Falcon 8X business jet, using an acoustic data acquisition and analysis system from Brel & Kjr.

Mennecy, France, July 06, 2016 --( Exterior aircraft noise certification tests are required by aviation regulators. The tests establish certified aircraft Effective Perceived Noise Levels (EPNLs) for each of the flight conditions: approach, flyover and sideline.

The Brüel & Kjær system uses three GPS-synchronized data acquisition stations that are distributed around the test area. They communicate via WiFi, and are controlled from a central monitoring station.

Each remote location measures and records noise and has a webcam, and one station monitors weather data. The central monitoring station controls the data acquisition, uploads data, interfaces to flight-track data and layered weather data, and calculates results.

The system is based on the modular Brüel & Kjær PULSE LAN-XI data acquisition hardware, which provides the measurement data for the official calculation of EPNL levels. This data is corrected, 1/3rd octave noise measurements compliant with the requirements for aircraft noise certification measurements in accordance with ICAO Annex 16, Volume I, amendment 9.

Brüel & Kjær’s system can also compute EPNL values including background noise, flight track and weather corrections for test validation and management of the tests. While these calculations are not usable for ICAO compliant certification like the 1/3rd octave noise measurement data is, they help testers ascertain their data is valid before ending the test.

The system can also calculate intermediate results such as OAL, PNL, PNL Tmax, PNLT curve and 10 dB down points, which are used during aircraft development testing to ensure designs are on target to meet their requirements.

For more information on Brüel & Kjær’s systems, visit the company's website.

About Brüel & Kjær
Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration measurement systems.

We help customers measure and manage the quality of sound and vibration in their products and in the environment. Focus areas are aerospace, space, defence, automotive, ground transportation, airport environment, urban environment, telecom and audio.

Brüel & Kjær has an unparalleled portfolio of sound and vibration equipment and is a long-established designer and manufacturer of innovative instrumentation including sound level meters, microphones, accelerometers, conditioning amplifiers, calibrators, noise and vibration analysers, and PULSE software.

We also design and manufacture the LDS range of vibration test systems, as well as complete airport and environmental monitoring systems: WebTrak, ANOMS, NoiseOffice and Noise Sentinel.

Brüel & Kjær runs a variety of training courses - from basic introductions to noise and its effects to more specialised classes teaching customers how to get the most out of their equipment. Free online training courses, conducted by our expert engineers, run throughout the year too.

Brüel & Kjær is a subsidiary of UK-based Spectris plc, which has annual sales of £1.1bn and employs around 8,300 people worldwide across its four business segments.
Contact Information
Brel & Kjr
Heather Wilkins
01223 389 800
Jarman Way

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