How to Measure STC Ratings (ASTC Measurements)
When we are testing a noise issue between units in a multi-unit housing complex or between closed office spaces, I often get the question “Can we just turn on some loud music in one room, and listen in the next room?” Good question. Although this can help confirm that there is an issue with inadequate sound isolation, it doesn’t exactly give us enough information to help provide a solution. (more)
OHSA Requirements for Employee Noise Exposure
We frequently get calls to come and assess noise levels in industrial facilities. The concern is usually whether the employee’s exposure to noise is meeting OSHA requirements. So what are standard OSHA requirements for employee noise exposure? (more)
Industrial Noise Mitigation Strategies
We were recently called in to help with controlling the noise levels at an engine test facility. I went to the site to take noise measurements in various areas of the facility. The problem was not within the test cells, but from all the external equipment needed to run the cells from air compressors, to dynamometer drives, to engine exhaust vents. The sound levels were not above the OSHA requirements but were definitely loud enough to warrant some noise mitigation. So what are the key considerations for industrial facility noise control? (more)
How Much Acoustical Absorption Do I Need?
Every year my nieces’ elementary school has a winter concert in their gym. Excited kids from all grade levels file into one side of the gym while the parents and friends squeeze into every remaining space. It’s wonderful to see all the kids singing so proudly, but it gets very difficult to hear the music in such a lively space with the parents talking and moving around to get the best camera shot. At Acoustics By Design, we get called in frequently to help design acoustical improvements for large spaces like school gymnasiums, cafeterias, and large classrooms. The big question is always “how much absorption do we need?” (more)
How Does Acoustical Absorption Work?
Walk outside on a cold winter day just after the first big snowfall and you can hear the hush in the air. Everything sounds different because that hush in the air is the snow absorbing sound. Now, compare that to walking into a gym where the sound bounces around and lingers in the room. Also, have you wondered why some hotel rooms are “soundproof” and some seem to have walls that are paper thin? (more)
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