Very Dedicated Listening Piano Rooms
CAW – Carbon Absorbing Wall
Hugh’s Video Walkthrough
• 2′ x 12″ Wood Frame Studs
• Carbon technology on walls and ceiling
• Multiple Layered Stud Space “Sandwiches”
• Wall Sections Bolted Together
• Low Noise Floors
• Engineered Ceilings
• 12″ Thick Door
Building your own room from the ground up has many advantages. First, you can choose the size. The proper width, height, length ratio to usage minimizes low-frequency modal issues. Proper room ratios allow for two dimensions. There is the O.D. or outer dimension. There is the ID which is the internal dimension. The difference between the numbers is low-frequency management treatment. The higher ceilings reduce the time-delayed signature impact from the ceiling and give additional “height” to our presentation. Noise issues can be addressed within the structure with our “sandwich” technology along with the proper rate and level of low-frequency absorption placed every 14 1/2″ in the room. The ceiling and the four walls are all tuned surfaces.
Excess pressure produces excess movement in the structure. The walls and ceiling will go diaphragmatic at certain frequencies and pressure levels. We must restrict that movement through layered mass and rigidity. Our goal is to let the room breathe a little but get back to homeostasis as quickly as design possible. This is one of the reasons we bolted the wall sections together. When large surface areas go diaphragmatic even for a brief period of time, they can produce a coloration to the middle and even higher frequencies. With less boundary surface movement, we have a lower noise floor in the room. With today’s high-resolution electronics and speakers we must get as much of the room “sound” out as we can through the proper room ratios and also through proper construction techniques.
We have increased the rigidity of the structure through our layered “sandwiches.” These panels that insert between the studs do two things. They allow us to adjust the depth of each stud space to provide the proper depths at the correct room position. The stud space depth produces the resonant frequency of the stud space. A resonate frequency is how low that absorber will go down to. Everything above the resonant frequency of the stud space will be absorbed at a given rate and level depending on the frequency and amplitude of the unwanted pressure issue at that room location. With this technique, we can provide the proper rate and level of absorption by adjusting the cavity depth along with the carbon filter density.
Rigidity / Flexibility
There is a rigidity/flexibility ratio that must be maintained in any critical listening environment. When you release 20, 30, and 40′ long waves of energy within your room, you are releasing this pressure in a box that will never have the proper distances to let each low-frequency wave live and die on its own volition without any room boundary interference (distortion). This distortion from pressure has two issues. The first is low-frequency modal pressure issues throughout the room with the greatest amplitudes existing from floor to ceiling. These “pressure nodes” oscillate every 18 – 36″ depending on frequency. Frequency and amplitude issues are different at each room location. We go after this unwanted pressure every 14 1/2″ between each stud space.
CAW – Carbon Absorber Wall
Low frequency management in small rooms is all about the proper rate and level of absorption, the square footage of coverage, and the position of that coverage. We have two choices when it comes to low frequency management technology. We can use freestanding units that meet the absorption requirements and take up additional space which we don’t have in an already built room, or we can build the technology within the walls of a new structure by using our CAW (Carbon Absorption Wall).
– Treatments for the piano room will be ceiling diffusion with our foam technology on all sidewalls.
– The piano room will be cherry and the listening room maple. The listening room will have vertical QD-17 modules on the front wall and two dimensional QD-17 on the rear wall. The rear wall will also have higher frequency diffusion centered on the door and header above the door.
– This two-dimensional, high-frequency diffusion on the rear wall will add to “sparkle” and “air” to our presentation without being overpowering.