The Department of Signal Processing and Acoustics (SPA) combines competence in different areas of research fields varying from ICT technology to core electrical engineering and its basic phenomena.
Towards carbon negative acoustic environments in buildings
The exhibition includes an open booth made of carbon negative wood-fibre based acoustic panels developed by our research team. Come and experience the biofibre-based acoustic panels.
Mineral wool and fossil-based materials dominate the acoustic building materials market. While they can be partially produced from recycled materials, such production requires highly intensive energy processes, and they lack the capability to sequester carbon from the atmosphere when compared with plant-based building materials.
Our research has studied the use of wood-based fibres as an alternative raw material to produce acoustic building materials. Properties of wood-based fibres strongly depend on their origin and the chemical and mechanical methods used for their isolation and treatment processes. It is essential to investigate the ultrastructure of different types of wood-based fibres to understand their properties for the optimisation of sound absorbers. Wood-fibre based acoustics materials are biodegradable, renewable, recyclable, and most importantly, they act as carbon sinks, sequestering the carbon from the atmosphere during its operating life. Using such materials in buildings improves the sound environment of spaces as much as traditional materials and reduces the carbon footprint of buildings, thus contributing to alleviating climate change.
Acoustic solutions made from natural fibres can reduce buildings’ carbon footprints
Aalto University researchers discovered that wood-based pulp fibres are also well-suited for making acoustic materials.
This research project is a collaboration work between a research-based company Lumir Oy and Aalto University.
Tapio Lokki, Professor at Aalto University School of Electrical Engineering, Department of Signal Processing and Acoustics
Tuomas Hänninen, R&D Director at Lumir Oy
Kari Kammiovirta, Research Engineer at Lumir Oy
Jose Cucharero, Doctoral student at Lumir Oy (Full-time visitor at Aalto University)
The artwork makes the three spiral staircases of the School of Business a zone of tranquillity and silence.
Designs for a Cooler Planet is a five-week-long festival celebrating experiments in planet-friendly materials, fashion, and food.