About | Waves – Brüel & Kjær Sound and Vibration

Within these walls

It covers an astounding 8500 square metres, houses an interdisciplinary team of 40 engineers and technicians, has temperatures ranging from +50°C to –40°C and climate chambers big enough to accommodate a refrigerated trailer – welcome to Europe’s largest independent testing laboratory, the Center of Competence for Refrigeration and Air Conditioning.

My car. My engine. My sound

There’s not a cloud in the sky, and the empty highway beckons through your windshield. You nudge the pedal closer to the floor, and the roar of the engine feels like joy. But who decides how that roar sounds?

The great aircraft certification challenge

With certification planned for year end, the game-changing Airbus H160 is smoother, cleaner and quieter than any other helicopter. But what does it take to certify a brand-new aircraft for the skies?

The human ear Part 2

Part 2 of The human ear examines the process of transforming sound from mechanical vibrations into neurological signals – beginning with a closer look at the cochlea.

Three HATS, one church and experimental music

Comparison of grand piano recordings made with traditional microphones and microphones embedded in human-like head and torso simulators.

Historical milestones that shaped the sound level meter today

With the relentless advance of technology, the sound level meters of today are very different creatures to those of the 60s. Let’s delve into history and look at the trends that are shaping their future.

B&K 2245 – from drawing board to release

From the release of the world’s first transistorized and hand-held sound level meter, through the early digital and modular software-driven sound level meters to the touchscreen-driven Types 2250 and 2270 of today, Brüel & Kjær has been consistently at the forefront of sound level meter development.

Exterior noise of a high-speed train

Transport by high-speed train is becoming more widespread particularly in these climate-conscious times. How can the external noise from these moving sources be efficiently measured and assessed?

Educator and problem solver

Growing up in Stockton, a city on the San Joaquin River in California’s Central Valley, Matt Allen’s passion for learning led to a career in research and education. Today, he’s still sharing knowledge and inspiring generations of engineers to come.

Microphone selection

Choosing the right microphone is not an easy task and choosing an inappropriate microphone can lead to measurement errors. This easy microphone selection guide should help if you’re not sure which microphone you need.

A quiet place for sound

What does it mean to say it’s a quiet room, and how do you measure ‘too quiet‘?

Spy on the wall

The goodwill gesture that was a master stroke of electronic bugging.

High-frequency HATS, why?

A head and torso simulator (HATS) is an objective measurement instrument with built-in, human-like ear and mouth simulators that provides a realistic reproduction of the acoustic properties of an average adult human. High-frequency HATS Type 5128 is an innovative evolution of the legacy HATS Type 4128. This article describes the unique benefits and features of the High-frequency HATS.

Five questions for Sidnei

37-year-old Brüel & Kjær Account Manager Sidnei Luis do Prado from São Paulo is a busy salesman, but when he does have time off, he spends it enjoying family life, reading, practicing photography and playing goalkeeper for a football team. His favourite culinary delights include wine, strong coffee, Brazilian barbecue and Italian cuisine.