Sonic Design Form® - Keystone

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Defined As The Most Important Part Of Anything. You will certainly feel that way when you see how the Sonic Design Form® Keystone enhances a room. This panel brings so many design options to the table. The unique shape works well with almost any acoustical fabric or wood veneer covering.



  • Available in three standard sizes: Small, Medium and Large.
  • Custom sizes can be special ordered.

    Shape Dimensions

Fire Rating

  • All components are ASTM E84—Class I/A


Acoustical Data

Frequency (Hz) 125 250 500 1000 2000 4000 NRC
Keystone Medium 0.51 0.83 1.13 1.13 1.11 1.03 1.05

Testing performed at an accredited acoustical laboratory within a controlled environment using specific fabric, sizes and mounting. Therefore, ratings may vary slightly depending on customers fabric choice and mounting configuration.

Fabric Finishes for Acoustical Panels

Your acoustical panel finish choices are endless. Choose your own material, or here are some links provided to a few of our recommended textile manufactures for your fabric selection. Please note not all fabrics are suitable for premium acoustical performance.

Select a fabric from one of our manufacturers:

Guilford of Maine
Knoll Textiles
Luna Textiles
Carnegie Fabrics