Articles 2015 - WAVES Magazine

A practical guide to using MIMO vibration control

For MIL-STD-810 single-axis transport testing of large, resonant, land-based military payloads.

Acoustic camera displays noise in 20 seconds

A simple tool for noise source identification that deploys rapidly to display sound in real-time, and records data for detailed analysis.

Acquisition unleashed

Perfectly synchronized real-time noise measurements over large areas are simplified with independent, wireless modules.

Bringing communities on board

How Manchester Airports Group’s new noise and operations management system is building trust through transparency.

Calibration is key to trust – and trade

Trust is the basis of all human relationships and a valuable business commodity. Calibration is a matter of trust, and though trust in itself is almost unmeasurable, measurements made with calibrated equipment create confidence.

Cutting the commute

Only in the final hot weeks of late summer do combine harvesters appear, carving their dusty trails through dry cornfields. To exploit every last minute while conditions are optimal, New Holland’s developers work hard to reduce the time driving between fields.

Desktop CAE sound auditions

CAE analysts can hear the consequences of their latest design changes, by efficiently combining CAE and test data on their own computer.

Diving deeper into the Blue Whale Sound

Growing up to 30 m long and 180 tons, the blue whale is the largest animal in the world. In addition to its impressive size, its calls can be heard thousands of kilometres away and far below the ocean’s surface.

Driving brand awareness

At Borla, we develop and build the world’s finest aftermarket exhaust systems for high-performance vehicles. In fact, we are the originators of this market, which has given us a unique understanding of what it takes to create the right product for a highly discerning customer.

Five questions for Marty

Senior Sales Engineer and Telecom Audio Solution Manager Marty Alexander hails from Brooklyn, NY. He joined Brüel & Kjær at the age of 32, having been a noise and vibration consultant until then.

Five questions for Roger

65-year old Roger Williams spent most of his childhood in Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch, North Wales.

Leap through jet engine testing

As aircraft engine makers like Snecma address emissions and cost challenges, scalable, high-performance test and analysis systems lie behind their rapid responsel.

Listening to the community

At BHP Billiton, the way results are achieved is just as important as the results themselves, and the impact of mining on surrounding communities is a concern that is taken very seriously.

Man on a mission

Throughout his life, Professor Amiya Mohanty’s sights have been firmly set on pioneering new waves in sound and vibration. Whether creating ground-breaking technologies far ahead of his peers or guiding students through the peaks and troughs of new scientific understanding, his journey is an inspiration to us all.

Multiple vehicle pass-by tests

Engineers can assess noise from many vehicles at the same time with data acquisition synchronized by GPS.

Remembering a Sound and Vibration Pioneer

Having just celebrated his 100th birthday, Per V. Brüel passed away on April 2, 2015. He was a visionary engineer and inventor, responsible for engineering breakthroughs in the late 1930s and early 1940s with the development of the world’s first acoustic analyzer and the first commercial piezoelectric accelerometer (Type 4303).

Simulation of realistic background noise using multiple loudspeakers

Whether walking down a street, or multi-tasking with our phone on ‘speaker’, we expect clear voice transmission. Sophisticated signal processing enhances our speech above background noise, but which method is best to test this capability?

Sorting out the sources of sound

The latest research into Blind Source Separation (BSS) – a technique that involves separating a mixture of sounds – indicates that it is a good method for assisting the automotive industry in evaluating noise from different sources.

Ten of the world’s noisiest cities

The World Health Organization suggests that healthy noise levels should not surpass 55 decibels during the day and 40 at night.

Testing Futuristic Fighter Jets

Collaborating with Lockheed Martin for many years, Brüel & Kjær is supporting the demand for ‘right-first-time’ engineering and supplying reliable, high-quality, goal-focussed solutions for noise and vibration testing and analysis.

The big noise in Europe: New laws and standards shaping traffic

Traffic noise is one of the most widespread environmental problems in Europe and it’s more than just an annoyance; it has become a major health concern. Research is driving changes in legislation to adopt new standards and help mitigate the impact of road noise on health.

The conductor’s point of view

At 58, David Chesky is a composer and musician whose commitment to sound is fanatic. After growing up among the Latin sounds of Miami, he moved to New York and found himself conducting orchestras in studios for films.

The fauna philharmonics

They howl, thump, bang, chirp and rumble. The sound and vibration repertoire of these animals would indeed make an interesting symphony.

The loudest sound, naturally

The loudest sound in recorded history came from the volcanic eruption on the Indonesian island Krakatoa at 10.02 a.m. on August 27, 1883. The explosion caused two thirds of the island to collapse and formed tsunami waves as high as 46 m (151 ft) rocking ships as far away as South Africa.

Uplifting sound quality

Today, sound is being recognized more and more as an important parameter when defining product quality.

Vehicle noise tests are getting tighter

The new pass-by tests coming in 2016 will help prevent ‘noisy’ vehicles from being able to satisfy legal sound limits in very specific test conditions – by broadening the scope of the tests.

Women in sound and
vibration

“It’s a man’s world,” they say, and looking at the statistics one would be tempted to agree.