Acoustic Wood Panels: Perforated vs Grooved Explained

Acoustic wood panels are wood-faced boards with either small holes drilled through them or grooves routed into them. To the eye they read as one continuous timber surface. Behind the face sits an absorbent layer, and the holes or grooves are what let sound reach it. A plain wood board would just reflect sound. The pattern is what makes it work.

How the pattern controls absorption

Three things decide how much sound the panel absorbs: the open area of the pattern, the size and spacing of the holes or grooves, and the absorbent layer and air space behind. A higher open area lets more sound through. Hole or groove size and spacing change which frequencies are absorbed. That is why these panels suit projects with a defined reverberation target, where you are choosing the pattern as much as the timber.

Perforated vs grooved

Both are available in a range of hole and groove sizes. The pattern affects the look and which frequencies are absorbed, and we can show samples of each.

Where they work best

• Boardrooms and executive suites: where fabric would look too utilitarian.
• Auditoriums and lecture theatres: timber is expected, and speech clarity matters. See auditoriums and theatres.
• Hotel lobbies and receptions: warm, premium and controlled. See hotels.

The advantages

• A continuous timber finish that still absorbs sound.
• The pattern is engineered, so you can tune it to the target.
• Veneer and lacquer finishes suit both classic and contemporary interiors.
• Stain, veneer or lacquer can usually be matched to existing joinery.

The limits

• Absorption depends on open area. A pattern with very little open area looks best and absorbs least.
• Standard timber panels are not recommended for high-moisture rooms. For those, see industrial acoustic panels.
• Fire class depends on the board and backing together, so both have to be specified and rated as an assembly. See fire ratings explained.
• Routine dusting is usually enough, but refinishing needs depend on the treatment.

Wood panels vs timber slats vs micro-perforated

Timber slats are separate strips over felt, with visible gaps. See timber slat acoustic panels. Perforated and grooved boards are continuous surfaces with a fixed pattern. Micro-perforated panels take the idea further, with very fine holes that are almost invisible. See micro-perforated acoustic panels.

What to ask before you order

1. Open area, hole or groove size, and tested absorption with the backing you will use.
2. The Euroclass fire rating of the complete build-up.
3. Finish options and the closest match to your existing timber.
4. Humidity limits of the room.

Common questions

Does the wood face reduce absorption? The pattern is what lets sound through. It sets the absorption. A plain wood face would reflect.

Which pattern should I choose? It depends on look and target. We can show samples of each.

Are they suitable for damp areas? Not standard timber panels. We would specify a moisture-resistant range instead.

Match the pattern to the target

Good looks and the right absorption don't always coincide, so check both. Book a free survey or see acoustic wood panels.