Sound & Vibration Quality

The research area relates to sound and vibration in real and virtual environments with respect to human needs and requirements. Applications are within automotive NVH, living environments and work situations. Specific research questions relates to:

I. Reproduction and simulation of sound and vibration fields in complex environments for optimization of performance and sound quality

II. Source characterization; transfer path analysis; demands; criteria; and control measures for sound and vibration comfort in vehicles

Engine Noise Simulator

An ENS is a useful tool to investigate sound transfer paths and to simulate different engines quickly without the need to replace the engine in the cabin.

The Scania ENS built at Luleå University of Technology, Luleå, uses 29 loudspeakers with a surface microphone in each individual loudspeaker c...

Frequency Sweep Excitation Test Track

The behaviour of a vehicle and its parts changes with temperature. The effect of temperature will alter the dynamic behaviour of the car and also affect the acoustic properties. For example, squeak and rattle noise are more pronounced in cold climate. In cooperation between Arctic Falls, Colmis, Ice...

Sound design for 3D signal sounds in cars

The purpose with the research project is to investigate methods and evaluate technical solutions for effective, environmental friendly and safety systems for vehicles, and also methods and tools for human machine interaction. The projects includes research within sound and vibration design, with goa...

New NVH* challenges in the development process of electric and hybrid vehicles

The objectives with the project are; to increase the understanding of how drivers and passengers perceive the interior sound and vibration of electric and hybrid vehicles, to find methods of how to handle the most important sound and vibration sources in these vehicles and to develop knowledge and m...

Measurement, identification, assessment and modelling of winter tyre noise

The noise caused by studded winter tyres is normally more annoying than the noise from ordinary tyres. The tyre noise inside the car is a product of the generated tyre noise and its structural and airborne transfer paths into the car interior. The annoyance that the driver can experience from the ty...

Friction induced sound of seals in cars in a cold climate

The purpose of this project is to improve the skills so that product quality is enhanced and ensured, enabling time and cost efficient product development processes. Squeaks & rattling the area is of great materiality for above all luxury vehicles. Noise from such two plastic items are not accep...

Studies of musical instruments

As a part of our research in sound quality, we are running a project jointly with a saxophone manufacturer. The aim of the project is to devise methods for designing product sound. Since musical instruments are designed specifically to produce a desired sound, they are excellent examples to use to s...

Rotor vibrations

Milling and other turning operations are common in the automotive and aerospace industry where large metal work pieces are reduced to a fraction of its original weight, forming complex thin structures. It is of great importance that unwanted behaviour like tool vibrations that causes poor surface fi...

Sound Quality

A product’s sound quality describes how well the sound is adapted to a specific goal and/or context (Blauert 1996).

The research focuses on the use of psycho-acoustic measurements to characterize the sound quality, noise disturbance and directional hearing. The research is mainly applied and has ...

Published:19 June 2018

Updated: 24 October 2019

By:Örjan Johansson

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