Case Studies
School Case Study:
The acoustics in school classrooms are especially vital to creating an effective learning environment for students. High levels of background noise and long reverberation times can increase students’ stress and anxiety levels, decrease their ability to hear and retain information and make it increasingly difficult for teachers to effectively instruct the students.
Recently, a school reached out to Applied Acoustical Group to help with an excessive noise issue in their lunch and gathering area. The nearly octagonal-shaped room suffered from a long reverberation time. This made it quite difficult for students and instructors to communicate. While the ANSI standard for reverberation times in classrooms under 10,000 square feet is 0.6-0.7 seconds, this room had a time of 2.0 seconds.
To bring the reverberation time down to the appropriate level, Applied Acoustical Group specified, sourced and installed 35 Pinta Acoustic Valueline absorptive panels. The 2 ’x 4’ panels weigh less than 0.5 lbs per cubic foot and are class 1 fire rated. They also make for an extremely easy install, with a total installation time of around four hours.
Test Report: July 19, 2017
Applied Acoustical Group completed its first full load noise test of the new patent-pending sound enclosure. The 4” composite wall enclosure was able to lower the noise level of a 200HP vacuum blower package from 110 dba to an average 83 dba when measured on all four sides of the blower package in a free field.
The Howden Roots 827 DVJ blower was set up to operate at 1760 RPM at a vacuum load of 16”Hg. The calculated package noise level was 96 dba. To generate the test load, we reduced the process inlet to create the 16”Hg load. The noise generated by
the artificial load was 110 dba.
The package was operated for a period of two hours with multiple test measurements. The values recorded were consistent during the entire operating period.
If you would like additional information about our enclosures please contact our sales team.
Test Report: September 28, 2017
Applied Acoustical Group completed a full load noise test of a new sound enclosure. The 2” embossed aluminum enclosure was able to lower the noise level of a 125HP pressure blower package from 98 dba to an average 82 dba when measured at all four sides of the blower package in a free field.
The Howden Roots 624 RAM blower was set up to operate at 2455 RPM at a discharge load of 7.5 PSIG. The calculated package noise level was 95 dba. To generate the test load, we mounted a butterfly valve to the process discharge to create the 7.5 PSIG. The noise generated by the artificial load was 105 dba
The package was operated for a period of two hours with multiple test measurements. The values recorded were consistent during the entire operating period.
If you would like additional information about our enclosures, please contact our sales team.
Noise in the classroom is stressful for all parties involved. It creates educational difficulties for students, while causing unnecessary stress on teachers. During a recent project, Applied Acoustical Group witnessed this problem firsthand. For a local arts academy, the culprit was a poorly designed theater room. With high ceilings and no absorptive surfaces in the room, not only did musicals and plays sound less than satisfactory, but the poor acoustics were wearing on the teacher after spending 50 hours each week in the room.
With a current estimated reverberation time of 4.8 seconds, AAG utilized charcoal colored Valueline absorptive panels to reduce that time to the recommended 1.0 seconds. The extremely lightweight panels made for an easy install, applying 64 panels in just under four hours. And the charcoal color of the panels blended in perfectly with the black box theater.
Contact Applied Acoustical Group today for help with all your noise abatement needs!
