Since 2008
What is Sound Diffusion?
In the ninth episode of the “Back to Basics” series, Dennis Foley demystifies the concept of sound diffusion. He emphasizes that sound diffusion is one of the most misunderstood acoustic tools. Unlike sound absorption, which reduces energy, sound diffusion does not diminish the strength of the signal. Instead, it breaks down reflected energy into smaller pieces, ensuring a balanced sound environment.
In Summary
Dennis explains that diffusion can be visualized as the opposite of absorption. While absorption involves running sound waves through materials to produce heat and reduce energy, diffusion takes the reflected energy and breaks it down. This is achieved using quadratic diffusers, which have a series of wells with varying depths based on half and quarter wavelength rules.
The orientation of the diffuser also plays a role in its function. A vertically placed diffuser diffuses sound horizontally, while a horizontally placed one diffuses sound vertically. The combination of both orientations provides two-dimensional diffusion, enhancing the sound quality. Diffusion adds air, separation, width, and depth to the sound stage, creating a more immersive listening experience.
Key Takeaways
- Sound diffusion breaks down reflected energy into smaller pieces.
- Diffusion does not reduce the strength of the signal, unlike absorption.
- Quadratic diffusers with varying well depths are used for diffusion.
- The orientation of the diffuser determines its diffusion direction.
- Diffusion enhances sound quality by adding air, separation, and depth.