Sound and Vibration measurements for a safer, quieter future in aviation


The aerospace and defense industry has always at Brüel & Kjær’s core. The accuracy, quality and reliability of its products are a perfect fit to the demands of this industry. Many industry-leading products, such as LAN-XI, result from that role and aid our existing and future customers to improve their product quality, reliability and time  to market.


The aeroacoustic test is not only required by the authorities to meet evolving environmental requirements, it is a key task in achieving quieter, fuel-saving, and low-emission aircraft. The progression of acoustic propagation models requires physical test data to be more accurate and precise than ever. Therefore increased channel counts, resulting in longer test preparation, is needed. Setup time is directly influenced by complexity, and with increasing wind tunnel usage, competition for time slots is stiff. This means there is no room for error or re-testing. Our LAN-XI-based data acquisition systems can be freely placed around the test sample, allowing greatly reduced sensor cabling costs and simpler test preparation.

Gas turbine testing

The demand for more fuel efficient and quieter aircraft engines has put engine manufacturers into focus for delivering faster and smarter powerplants.

Aircraft engine development presents a major challenge: merging improved performance with a 100% operational reliability. Brüel & Kjær’s solution offers a fully integrated, highly scalable system architecture that provides real-time data monitoring for potentially dozens of remote data processing and viewing seats. It communicates seamlessly with slow speed DAQ system and engine instrumentation information systems through APIs.

Satellite testing

Every satellite that goes into orbit needs to run through specific test campaigns to simulate the launch before it happens. Manufacturers and operators must be sure that all systems can fulfill their intended tasks and operate for their expected lifetime. The setup of such a test is a huge undertaking, with high channel counts and technical complexity. A streamlined workflow and standardized process dedicated to minimizing errors is key to being cost-effective testing.

Brüel & Kjær hardware and software provide reliable data with easy access to shock response, swept and stepped Sine, random vibration, and acoustic testing. Time savings start with a spreadsheet that can be concurrently edited by specialists to save time. The system can also record the entire test and at the same time extract testing impulses for transfer directly to post-processing without having to visually crop each impulse.

Structural dynamics

This area covers the behavior of structures subjected to dynamic loading. Understanding how structures behave in action enables engineers to optimize their designs, monitor structural integrity, and maximize performance.

Brüel & Kjær offers a complete and unique solution to address experimental structural dynamics purposes, with a full coverage of the measurement and analysis chain, based on BK Connect software, LAN-XI hardware, modal shakers and/or hammers, and transducers such as force transducers, accelerometers and tacho probes. Our modern user interface, with tasks and subtasks that are fully customizable, improve productivity and reduce test campaign preparation time.

Brüel &Kjær can offer the complete measurement chain – from excitation to sensors and all the way through data acquisition and evaluation. Shaker excitation is needed when the natural source isn’t available, or the test must run under defined parameters or environmental conditions. A great deal of effort has been taken to ensure that acquired data is accurate and valid  and repeatable.

Brüel & Kjær is able to provide fast and reliable measurement systems that enable swift decision-making with the confidence that data is right the first time, greatly impacting time to market. Global synchronized data distribution capabilities allow our worldwide-acting clients to improve their processes and the optimized usage of limited human resources.


This article was provided by Brüel & Kjær

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