Advanced acoustic methods for control of low frequency noise in vehicle
| Reference number | |
| Coordinator | CREO DYNAMICS AB |
| Funding from Vinnova | SEK 700 000 |
| Project duration | April 2018 - December 2018 |
| Status | Completed |
| Venture | Competence centre |
Important results from the project
The purpose of this project is to develop innovative methods for the reduction of low-frequency sounds in light vehicles. The project has led to new optimization processes and algorithms for Active Sound Control of road noise. In addition, a new patented concept for sound absorbers based on metamaterials has been evaluated in the project. Validation using 3D printed prototypes has shown a great potential for muffler applications.
Expected long term effects
The work has led to the development of lightweight alternatives for acoustic treatment for low frequency sound in vehicles. The developed solutions include effective active sound control in the cockpit and sound attenuator concepts for flow induced noise. These techniques will support electrification of the vehicle fleet by opening for better sound comfort without leading to increased weight.
Approach and implementation
The work has been divided into 3 sub-projects. Each sub-project was performed by a special project team. The sub-project on the choice of reference for active sound control of road noise, led to an exam work done by a KTH student. The main deliveries of the project are three technical reports that are attached as appendices