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? The high-speed train network is growing fast worldwide, particularly in China. Many of the lines pass close to…
Stop the noise
Located in Canton, Michigan, Material Sciences Corporation (MSC) is a materials supplier and engineering services provider, primarily working on innovative solutions for lightweighting, acoustics and coated-metals solutions. They offer products and services for a wide range of industries and markets – from automotive to appliances….
Optimizing the future driving experience
From sustainability to safety, electric vehicles to autonomous cars, the automotive industry is transforming rapidly. With the market narrowing, the user experience will be the differentiating factor, and one future trend – simulation – will be invaluable.
A new approach to end-of-line vehicle auditing
To enable the identification of production issues, a portable analysis system has been developed to complement the subjective impression of the audit driver by automatically producing objective data that can be used to diagnose and solve problems. In a production plant environment, the traditional method…
Analysis of vehicle voice recognition performance
Analysis of vehicle voice recognition performance in response to background noise and gender-based frequency. To address customer complaints on voice recognition (VR), Hyundai and Brüel & Kjær Global Engineering Services analysed the performance of the in-vehicle VR system and the sensitivity to background noise and…
Active vibration-based SHM system: On an operating Vestas V27 wind turbine
Can you detect a 15 cm crack in a wind turbine blade without stopping the wind turbine? A three-year-long research project, partly financed by the Danish government, proved that this is indeed possible. Modern wind turbine blades are designed to last for 20 to 25…
Predicting detectability and annoyance of EV warning sounds using partial loudness
Electric vehicles (EVs) are so quiet at low speeds that they can be a danger to pedestrians, cyclists and other road users. So the challenge for car manufacturers is to create sounds that are detectable but not annoying. To avoid them becoming a hazard, proposed…
The screaming void: An hour in an anechoic chamber
As you walk into an anechoic chamber, you enter a strange new world: spiky, soft walls enclose every surface of the room. And when you look down, the floor is just a see-through mesh. Bouncing on the criss-crossed wires, the atmosphere seems to thicken around…
Using hand-held arrays for automotive NVH measurements
Microphone arrays help engineers develop sound quality on vehicles, giving fast and effective noise source identification. Now, advanced new techniques improve the insights possible. One of the challenges for the automotive engineer is understanding the cause of a noise problem. Simple measurements, such as those…