Designing an Acoustic Panel

Reclaiming Timber Waste: A Sustainable Approach to Acoustic Design

Sustainable design is no longer just an aspiration; it’s a responsibility. This project showcases an innovative way to repurpose timber offcuts—often considered waste—into high-performance acoustic panels that marry functionality with environmental consciousness.

The Concept

Timber offcuts, frequently overlooked and discarded on construction sites, can be reimagined into valuable design elements. This initiative seeks to transform these small, irregular pieces into acoustic panels that control noise and adhere to sustainable building principles.

using found timber offcuts in the workshop

Efficient Design Solutions

The design process prioritises efficiency and minimal waste. The system remains adaptable to different timber types by accommodating offcuts of varying dimensions. Simple tools such as circular saws and jigs are all needed, making the method easily replicable on-site. This straightforward yet thoughtful approach maximises material use while maintaining the integrity of the design.

THE DESIGN SHOULD BE REPLICABLE IN MOST CONSTRUCTION SITES WITH THE LEAST AMOUNT OF CUTS AND STEPS.

Enhancing Acoustic Performance

Though timber may not rival the sound absorption of specialised foams, the strategic arrangement of triangular offcuts in a herringbone pattern improves sound diffusion. Acoustic tests revealed that the panels effectively lower noise levels, enhancing the auditory experience within any space they occupy.

I have created a small enclosed space with a wooden shelf and felt, with one side of it being the back side of the panel, which is a smooth MDF texture. I then play a tone (440Hz) within the space and measure the decibels (dB) of the internal space. The experiment is then repeated with the textured side.

The result from the sound level meter shows an even decrease in the whole range of frequency from 73dB to 66 dB.

Sustainability in Practice

This project’s commitment to sustainability is evident at every stage. Repurposing offcuts dramatically reduces waste, and fewer materials end up in landfills. Additionally, the reduction in transportation needs results in lower carbon emissions. The finishing treatment, involving natural beeswax, adds durability and moisture resistance while aligning with eco-friendly values.

The components are arranged in a spiral pattern, glued with PVA glue, and sit for 2 hours to create the final product.

Challenges and Learnings

As with any prototyping, challenges emerged. Achieving precise alignment in the herringbone pattern required careful attention to detail, particularly when addressing variations in offcut sizes. Solutions included on-site adjustments such as sanding and realignment, highlighting the significance of precision in fabrication.

With the limited use of a circular saw which can allow tilted cut, technician Richard helped me create a jig that will enable the material to be temporarily attached to it with double-sided tape.

Concluding Thoughts

This project exemplifies how a creative approach to material reuse can redefine waste in construction. By focusing on sustainable design and efficient production, these acoustic panels illustrate how even the smallest piece of timber can significantly shape a more responsible and resourceful built environment.

For my archetype, the offcuts have a 30mm x 30mm footprint; hence they are relatively small

Yet, there is a minimal difference in the scale of these panels as they all provide an uneven surface for sound absorption. It depends on the thickness and width of the batten offcuts.