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Learning center / Acoustics by building type / Library

Acoustic panels for libraries: the complete guide

What makes libraries noisy, which panels fix it, and how to plan treatment from start to finish.

2 minute read · Updated Nov 2026

A quiet room where small sounds do not carry. Acoustic panels do that by absorbing sound energy that would otherwise bounce between hard surfaces. In libraries the main sound sources are quiet conversation and footsteps, and the most common complaints are that whispers carry across the room, the circulation desk is noisy, and that group study rooms leak.

What is going wrong in the room

Every hard surface reflects sound. When a room has a lot of them, each sound keeps bouncing for a long time and overlaps the next one. That build-up is called reverberation, and it is measured as RT60: the time it takes a sound to fade by 60 decibels. A typical library of 60 × 40 ft with a 12 ft ceiling has a volume of about 28,800 ft³. With typical surfaces (drywall, a rug and some furniture), its echo time is about 1.96 seconds. The target for libraries is 0.60 seconds.

What panels can and cannot do

  • Panels can shorten reverberation, remove flutter echo, make speech clearer and lower the overall noise level that builds up in the room.
  • Panels cannot stop sound passing through walls, floors or doors. That is soundproofing, which needs mass, airtightness and isolation. See soundproofing and STC for libraries.

The recommended starting point

For a library like the one above, we suggest about 97 48 in round round ceiling cloud, 2 in thicks, which brings the echo time down to about 0.60 s. That is roughly 51% of the wall area if the panels went on the walls. A good split for libraries is about 40% on walls and 60% on the ceiling.

Open the designer with this setup loaded, or browse ready-made models on our library solutions page.

Plan it in five steps

  1. Measure the room and note what the floor, walls and ceiling are made of.
  2. Work out how many panels you need with the room calculator or the worked example for libraries.
  3. Decide where they go, starting with the placement guide.
  4. Choose thickness, fabric and color to suit the room and its cleaning needs.
  5. Check the fire and code requirements before you order.

Guides for libraries