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When Ditch Witch® needed to acoustically treat their training room, they had a big and bold idea – take a cool promo photo and use that to make a Silent Pictures® mosaic! The required scale made it easier to break up the photo into a 3’x3′ matrix, which also eased the shipping and installation process! The final product (at over 9 feet tall and 15 feet wide) is imposing, and while it isn’t quite life-sized, the impact is indeed massive!
“Thank you so much for all the help you and your team did on this project. Our training room is complete now.Ditch Witch Midwest
We are over the moon happy.”
Posted by Acoustics First in Absorption, Auditorium, Home Entertainment, Home Theater, Multipurpose Rooms, Music Rehearsal Spaces, Music Tracking Room, Press Release, Product Applications, Products, Recording Facilities, Recording Studio, Studio Control Room, Theater, Uncategorized, Vocal Booth, Voice Over, Worship Facilities on May 24, 2021
Bass frequencies are difficult to control… and there is sometimes a tendency to overuse standard, broadband panels to try to absorb everything in order to get rid of that bass. However, this method is unbalanced and has the side-effect of leaving a room sounding muffled and boomy.
Physics! High frequencies are easier to absorb than low frequencies. So, when you ONLY use broadband absorbers, they easily remove the high frequencies and leave more of the lows. Overusing broadband absorption in a large performance space can be a disaster – leaving an environment lacking energy and feel – many describe this condition as a room sounding “dead.” (Not good!)
So how can you treat the boomy bass without killing your rooms with too much broadband absorption? Can you just take out the bass? Unfortunately, it is impossible to ONLY absorb the bass, but we can LIMIT the amount of high frequency energy that we absorb to balance out the response.
Acoustics First® presents… the Sonora® LFC – Low-Frequency control panel.
The Sonora® LFC looks like a standard Sonora® Wall panel, but looks can be deceiving! At 4-1/8″ thick, it is virtually indistinguishable from a High-Impact Sonora® panel – however the interior structure of the LFC is optimized to attack the bass frequencies and smoothly roll off the high frequencies. Let’s take a closer look at the performance difference between the Sonora® LFC and the standard Sonora® panel.
When you look at the performance charts, you will notice that the standard 4″ Sonora® panel starts to “roll-off” in the lower frequencies below 125 Hz – it still absorbs them, just to a lesser degree. We designed the Sonora® LFC panel to focus on those frequencies below 125 Hz – while allowing the other treatments to handle the rest! This allows you to use fewer broadband panels, and still have some high-frequency energy for diffusers to spread around – thus creating a more balanced acoustic environment.
The Sonora® LFC is an engineered solution using the same high-performance materials as our other products, but combining them in a way that optimizes them for Low-Frequency Control – hence Sonora® LFC! The magic is in the way those materials are used.
All of the materials used in an acoustic environment have a function – “Diffusers,” “Absorbers,” and “Bass Traps” are all general descriptors of product functions. Some diffusers are also Bass Traps. Some bass traps are also broadband absorbers. Some diffusers use absorption for amplitude grating. By combining a dampened, resonant trap with multi-density fiberglass, the Sonora® LFC focuses on making acoustic spaces more balanced. For controlling the bass without sucking the life out of a room, the LFC Panel is an outstanding tool for refined Low-Frequency Control!
Sound Attenuation Matrix Management
by Acoustics First®
20 Years ago, John W. Gardner developed the ASP™ Panel Technology to maintain optimal acoustic performance of our acoustic absorber product lines – like the Sonora® Wall Panels. Recent developments have been made to augment this earlier technology, and our Research & Development team has evolved this technology into the “information age.”
Meet S.A.M.M.™, the smart way to manage your panel maintenance tasks.
S.A.M.M.™ Panels analyze the acoustic environment and use this information to track their exposure to sound pressure levels. This can be monitored real-time, either directly through the energy efficient OLED screen, or using any device with a web browser.
This technology allows more than just monitoring the acoustic environment. The S.A.M.M.™ Enabled panels have a HAL BIOS which runs a webserver daemon that gives you full-control of your panels and the acoustic environment…
… but this isn’t only for S.A.M.M.™ Enabled Panels!
After a simple firmware upgrade to your ASP™ panels, you will have full control over your entire acoustic environment – from anywhere in the world.
I am flattered that you have taken the time to reevaluate one of my lifetime projects. I owe all of my minimal knowledge… to my first professor… I LIRPA.Dr. John Wesley Gardner
Watch the following video to see the history of the ASP™ panels developed by the irreverent, John W. Gardner, and their evolution into the Sound Attenuation Matrix Management Technology known as… S.A.M.M.™
S.A.M.M.™ is Open Source
Acoustics First® values innovation, and we can all stand on the shoulders of giants. Customers can build their own implementations and create the ideal solution for their environment. While you can use whichever hardware that you have access to, here is the hardware our research team used to develop our in house integration.
Custom 3D Printed Housing (PLA)
SEEEDuino XIAO M0+ (MCU)
128×64 OLED (SSD1306)
SD Card Reader (SPI)
Electret MIC w/Adj. Gain (MAX4466)
5 Watt/8 Ohm Speaker
12mm Momentary Switch (Red LED)
Optional – 10000mah USB Battery
(Click the image to enlarge)
S.A.M.M.™ Web Console
Experience the S.A.M.M.™ Web Console interface. View the real-time output of the first S.A.M.M.™ unit, installed in the Acoustics First® R&D LAB. You can view the current capacity of the panel, as well as the average sound intensity – and as a bonus – we allow users to PURGE the panel remotely!
Stay up-to-date with cutting edge advances in acoustics with Acoustics First®.
For this installment of “Similar, yet Different”, we will be going retro – The Barrel Vs. The Pyramid! These two shapes are the historic foundations for modern acoustic treatments. How did they come about? Why do they work? How are they different?
These two shapes have origins before written history. The pyramids of Egypt may not have been renowned for their acoustic properties, but they certainly show the historical age of this shape. The barrel is also an ancient shape, born from the pillars of historic temples and gathering places. Both of these shapes have been used in architecture for the expanse of human history, and their acoustic properties have been studied in numerous environments, in many different applications.
These shapes are often referred to as “primitive.” The barrel, in its basic form, is a truncated cylinder – basically a segment of the cylinder. The pyramidal is, in this case, a modified/offset pyramid… a pyramid without equal sides. Their differences begin with this fundamental variable – the pyramid has angled planes and the Double Duty™ is a large curved surface.
Symmetry vs. Asymmetry
Another simple difference is the fact that the Double Duty™ is symmetric and the offset pyramid is asymmetric. The barrel primarily scatters sound across the curve of the face – sending acoustic energy in a wide arc. However, the pyramid’s facets are all angled slightly differently – reflecting in different directions. This allows the pyramid to be installed in complex arrays which create more “random” reflections due to their different facet angles. The Barrel is primarily a one-dimensional diffuser, and installs either horizontally or vertically.
There is another phenomenon that helps to contribute to diffusion – and that is diffraction. Diffraction is what happens to sound when it hits a corner or edge. Unlike light, acoustic energy is the physical fluctuation of pressure changes – which gives sound the ability to travel around corners. This bending varies by the wavelength of the sound and the size of the object in encounters. Both barrels and pyramids have facets which introduce diffraction, and while both can be made in different sizes, the offset pyramid has different sized facets on each device – contributing to more randomized diffraction at different frequencies.
Inverse Square Law
Without getting too heavy into math, as sound travels it decreases in intensity. This is due to the fact that sound “spreads out” as it travels. It is produced with a finite amount of energy, so intensity drops as it covers more space. Both the barrel and pyramid increase the rate that sound “spreads out,” which diminishes the intensity of the sound – however, they both do it slightly differently, however..
The Double Duty’s™ curvature leaves the wave primarily intact, but it increases the rate of expansion across the curve. This redirection is very smooth and predictable, where the random facets of the offset pyramid break up the sound into sections which travel in different directions. At the intersection of those facets, diffraction takes the reigns and scatters sound even further.
By increasing the rate of expansion of the wave, you decrease its intensity while also breaking up the wavefront which helps to reduce echoes and flutter. Both the barrel and the pyramid are perfect for larger spaces, as those massive surfaces do a great job of controlling reflections from large wave fronts. Also, due to their simple shapes, they can be made really big, which helps!
There is one more feature which is sometimes overlooked. Because of the material of their construction, and the large volume of air behind them, these diffusers exhibit a certain amount of “bass trapping.” The Double Duty™ diffuser got it’s name due to this characteristic. It’s not just a diffuser, but also a bass trap. The Pyramidal diffuser also exhibits bass absorption, though it is slightly less.
So there it is… the battle of the classics! Sometimes, keeping it simple is the way to go!