B&O Beosound Fibonacci Texture: Parametric Acoustic Design

In this 1.5-hour session, we recreate the iconic Fibonacci texture found on the B&O Beosound A9. This tutorial is essential for industrial designers looking to master computational design workflows that outperform traditional CAD software like SolidWorks or CATIA when handling complex perforations.

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What you will learn in this module:

• Phyllotaxis Spiral Logic: Step-by-step generation of 2D and 3D spiral patterns using mathematical sequences in Grasshopper 3D.
• Design for Manufacturing (DfM): How to transfer intricate perforation textures to 3D parts while maintaining proper demolding angles and wall thickness.
• Data Management: Using Dispatch and Remap Numbers to control thousands of geometric instances across a curved surface.
• Efficiency Workflow: Discover why a parametric approach is the only way to iterate on acoustic vents and textures without crashing your CAD file.
• Portfolio Presentation: Assembling complex mechanical components (legs, subwoofers, and IR receivers) into a professional product visualization.

Tools & Plugins

Software:

• Rhino 3D – For base strap modeling and spatial deformation.
• Grasshopper – For automating the fading pattern and point displacement.
• KeyShot – For cinematic product visualization and lighting.

Step 1: Defining the Base Geometry

• Draw profile curves to define the front and back speaker discs.
• Establish technical dimensions for the handle, subwoofer acoustic vent, and IR receiver.
• Layout the tripod leg orientation curves to ensure structural balance.

Step 2: Mechanical Cutouts

• Create the back disc cutouts for the internal components.
• Shape the handle and subwoofer housing areas using precise NURBS curves.

Step 3: Tripod Leg Assembly

• Create a revolved profile for the legs using the established guide curves.
• Use the Orient command to accurately position the legs relative to the discs.
• Perform a Boolean operation to create the mounting holes for the legs.

Step 4: Acoustic Vent & Cable Management

• Generate curves by arraying circles on two elliptical paths.
• Join circles using tangent curves to create a fluid vent shape.
• Use Boolean Difference to carve the vent and modify the disc for the cable outlet.

Step 5: Grasshopper Spiral Logic

• Draw concentric circles to act as the base boundary.
• Extract points along curves to generate the initial spiral shape as an Interpolate Curve.

Step 6: Grid Density & Polar Arrays

• Polar array the spiral curves and extract the resulting point grid.
• Use the Dispatch component to create alternating curve point densities for a natural look.
• Finalize the base grid that will drive the acoustic texture.

Step 7: Parametric Circle Scaling

• Generate circles on every grid point.
• Measure the distance from the disc centroid to each point.
• Remap the distance to strictly control the minimum and maximum circle sizes for manufacturing constraints.

Step 8: Texture Transfer (DfM)

• Extrude the generated curves and intersect them with the base disc.
• Move the shapes into the correct spatial position.
• Execute a Boolean Difference to transfer the final acoustic perforation texture to the solid disc.

Step 9: Final Assembly & Detailing

• Add precision holes for screws and internal speaker mounting.
• Combine the textured disc, tripod legs, and subwoofer components into the final assembly.

Step 10: Rendering in KeyShot

• Export the final model into KeyShot for professional visualization.
• Visune.io Integration: We are using Visune.io materials to quickly add high-quality, photorealistic finishes to our scene.
• Enhance Your Renders: You can download free materials from the Visune.io website to instantly enhance your product visualization and portfolio quality.

Conclusion

This workflow demonstrates the immense power of computational design for professional product development. By mastering the mathematical logic of Phyllotaxis spirals and combining it with Design for Manufacturing (DfM) principles, you can create iconic, high-performance textures like those seen on the B&O Beosound.

Whether you are building a design portfolio or developing complex acoustic textures for consumer electronics, using Rhino 3D and Grasshopper allows for a level of precision and iteration that traditional CAD simply cannot match. From advanced surfacing to final high-end visualization with Visune.io materials, this end-to-end process is a must-know for any modern industrial designer.

Thanks for reading ❤️