Acoustic Testing: Computer Modeling vs. Real World Accuracy

For anyone  that is interested in the accuracy of different testing methods (computer modeling vs. real world accuracy) for determining the STC of a wall assembly, Sound & Vibration Magazine has an article in its December 2014 issue.

It covers the testing comparison of the different methods, using  four types of wall assemblies.

A very interesting note is the drop in efficiency of all of the drywall assemblies between 1500 Hz. and 4000 Hz., as compared with a 6” concrete wall.


Read the full article here: Computer Modeling of STC – Options and Accuracy, by Daniel M. Horan


Michael Binns

Michael Binns

Founder of Acoustical Solutions

800 782 5742 ext. 112

Whisperwave Clouds at UVA OpenGrounds

UVA OpenGroundsThe OpenGrounds facility at the University of Virginia was designed as a collaborative meeting and workspace for faculty and student groups. William Sherman, the architect behind the renovation of the building knew that a space with high ceilings and an open layout like this one, needed to have acoustics taken into consideration.

Large gatherings, open table discussions, and presentations require a room with low reverberation for speech intelligibility. So to achieve this, Sherman contacted us and we recommended Whisperwave™ Clouds. Whisperwave acoustical clouds are made with sound absorbing foam material with an NRC .85 and are effective at reducing high reverberation times created by bare surfaces.

Whisperwave Clouds at OpenGrounds

Lindsey Hepler, the program manager for OpenGrounds, says that there was a noticeable difference in the sound and usability of the space after the Whisperwave Clouds were installed.

whisperwave clouds


See the full case study!


Featured Case Study

Acoustical Wall Panels and Ceiling Clouds for The Spirit of the Mountain Band at Liberty University

The Liberty University Band was upgrading and moving to a new rehearsal room when they called Acoustical Solutions.

Together, the two came up with a plan to install acoustic panels and hanging acoustic ceiling tiles to compliment the sound diffusion that had already been planned.

In the end, the noise control solutions that were put into place greatly improved the band room acoustics in the new facility. Read More

Quick Solutions: Soundproofing an Interior Window

Many business don’t own, but rent, their office space. This can cause a headache when modification of the facility is needed to suit the organization’s changing needs, but isn’t allowed by the landlord.

This was the case with a clinical social worker who rented a small office space in a great location. There was originally a receptionist’s office with an interior window connected to the waiting room. This office needed to be converted to a patient counseling room to accommodate the growing number of clients, but obviously the room had to be as private as possible. The transition would be impossible without completely soundproofing the opening in the wall - ideally by filling it in and making the whole wall solid.

The owner of the building wasn’t open to any permanent modifications, so the social worker called Acoustical Solutions to see if anything could be done to block sound completely through the opening.

ASI Rep Kevin McIver came up with the idea to use a combination sound blocking and absorbing product on the opening, that could be covered to hide the modification and put clients more at ease:

“We used an ABSC-25 blanket to cover the window on one side and they put up artwork on the either side”

The blanket has an STC of up to 33, the same sound transmission class as a standard interior wall. The response from the client was positive, and the installation method used suited their need for a removable solution:

“Hi Kevin . . . worked out great! Perfect fit and the heavy duty velcro helped to hold it securely to the outer molding!

Here is a pic of the blanket up and the outside of the window for you to get an idea of what it looks like underneath the blanket.

Thanks so much . . . I have given your card to a colleague of mine too! – Renee”

acoustical blanket window


For any questions about this application or any other noise control issues, call Acoustical Solutions at 800 782 5742!



Kevin McIver

Architectural Sales Rep

800 782 5742 ext. 19


Soundproofing a Computer Lab: NCSU’s Acoustical Solution

North Carolina State University’s lab and office space in the engineering department had very low speech intelligibility making it difficult to hold conferences and classes. The problem was a long RT60, or reverberation time. Soundproofing against this noise issue requires sound absorbing materials like acoustical wall panels.

PolySorpt™ Sound Panels were installed along the walls to absorb sound energy, lowering the reflection of sound and therefore reducing the echo.






From the client: “I have the panels up and they look and sound great” 

PolySorpt are non-fibrous sound absorbing panels that can be used both indoors or outdoors to reduce ambient noise levels and excessive reverberation.

The panels can be glued directly to any wall or ceiling, or bolted down as pictured in this appication. These acoustical panels are offered in a standard flat surface pattern or a more decorative designer pattern you can see here.

PolySorpt comes in either charcoal gray or white, in 2′x2′ or 2′x4′, and 1 and 2 inch thicknesses. The 2″ version is NRC.70 and the 1″ is NRC.45.

ryanlarkinRyan Larkin

Architectural Sales Rep

800 782 5742 ext. 13

Win Primacoustic Scatter Blocks for Your Music Room!

Our first giveaway of the year to celebrate our 25th Anniversary will be a set of Primacoustic Scatter Blocks!anniversary-seal2

Primacoustic Scatter Blocks are an easy-to-install acoustical treatment used in spaces where you want to control sound, but do not want to eliminate the natural room ambiance.

Scatter Blocks are an excellent choice for live-end, dead-end designs such as sound studios, media rooms, practice spaces, and home theaters. This acoustical treatment is designed to be randomly spaced on large wall surfaces to create an effect we call “soft diffusion”—an affordable alternative to full scale quadratic diffusion. By leaving reflective spaces between the panels, some sound energy is absorbed while the remainder is reflected back into the room. This helps control flutter echo and reduces standing waves while retaining a sense of liveliness and space in the room. 

If your music practice or recording room needs improved acoustics, you need to enter to win!

Simply go to our facebook page and comment on this image by telling us your favorite genre of music!



A winner will be chosen at random after one week, and will be notified through Facebook.

Good luck!