Patent ID: 8136630

Claim:
An acoustic device for altering sound, comprising: an architectural structure constructed to be mounted on a wall of a room, the architectural structure having a solid body defining a channel therethrough, the channel having a volume (V) and a diameter (d), the solid body having a thickness (z) defined by a maximum distance between an external surface of the solid body and an interface between the solid body and the channel; wherein the solid body is configured to alter incident low-frequency through high-frequency audible sound waves received by the acoustic device in a manner that includes at least one of absorbing, reflecting, diffracting, or diffusing the incident sound waves; and the channel of the acoustic device absorbs incident sound waves received by the acoustic device, and has an absorbing frequency (f H ) determined by the equation: f H = 1127 · d 4 ⁢ π · V · ( z + 1.7 · d / 2 ) .