Sounding Off: Our Blog
Thoughts, insights, and perspectives on the latest news, trends, and issues regarding architectural acoustics, environmental and industrial noise and vibration, and audiovisual systems design.
Acoustics from the Ancient Amphitheatre to the Modern Arena
In the days of the ancient Romans, crowds would gather by the thousands in the amphitheater to see a wide range of events: public ceremonies honoring brave soldiers, performances of dramatic presentations, or the gruesome games of the gladiators. Although the events were a visual extravaganza, the amphitheater and coliseum were also designed acoustically to allow the entire audience to hear. Fast forward two thousand years, and we still gather in large groups to see college graduations, rock concerts, sporting events, and more. Two of the primary senses that are titillating to the large masses still remain the same: visual and aural stimulation.
Noise Isolation for Hospital Mechanical Rooms
Hospitals and Healthcare Facilities have requirements for large volumes of ventilation and strict control of airflow, and the greater the airflow, the greater the potential for noise. Building mechanical services equipment, fans, pumps, cooling, and heating equipment are all sources of high noise levels. When Acoustics By Design works on a new hospital, we typically expend half of our effort on attenuating building mechanical systems noise. In order to avoid the need for extensive noise and vibration isolating constructions, project designers and engineers should pay careful attention to mechanical room sizes and locations during schematic design. Here are some issues to address early on…
New FGI Guidelines Turn Down the Volume on Health Care Acoustics
The 2010 FGI Guidelines for Design and Construction of Health Care Facilities was published in January and adopted as building code by many states. How will you deal with the new noise, privacy, and acoustical requirements for healthcare facilities? Join us at SoundHealthcare 2010, a Health Care Acoustics Training Seminar (Registration is now closed), and find out what you must know about the new FGI Guidelines for HIPAA Compliance and LEED HC. The new guidelines are the culmination of over five years of collaborative work by researchers, architects, engineers, and acoustical consultants to solve the problems of speech privacy and excessive noise in hospitals. The guidelines are effective immediately for the design of all healthcare facilities.
Tunnel Vision | Highway Traffic Noise Wall Barriers
On a recent trip to Chicago, my wife and I were thankful for all the new traffic lanes recently completed. I can remember when the trip back home to my folks took an extra couple of hours if I got stuck in all the traffic. But thankfully, with the new highway renovations, we’ve actually had some easy trips with no more traffic backups. Of course, our easy traveling must come at a cost. High density population areas are often encroached upon by the infrastructure needed to support them. In our case, the highways got a lot bigger with more lanes but that meant that they were even closer to the houses and neighborhoods that we drove through.
Commissioning Audio-Visual Systems | Why it’s Essential
This past summer I went to commission a small sound system at a new facility. Not necessarily a big expensive project, but the client had hired us to commission the final installation and make sure everything was installed as specified. I showed up on site, confirmed all of the equipment was installed and then proceeded to check out how the wiring had been installed. At first everything looked pretty good, until I pulled one of the microphone input plates off the wall and discovered that there was no junction box behind it. Instead someone had busted a hole in the masonry block and tried to fish the wires down through the block from above. But they had run into a little problem at the steel beam. So they made another hole through the vapor barrier and ran the wires just inside the exterior brick. Problem solved, right? Uh… not so much.
How Hotel Conference Rooms Can Make Money By Offering Audio-Visual Services In House
When hotel owners and managers consider the costs of upgrading their current hotel conference room audio-visual system, they often consider outsourcing these services to a live event production company – one that would bring in portable AV equipment and run it for the events. But more and more hotel managers are learning that offering the audio and video services in-house can be a lucrative cash cow. And they’re finding that the conference room guests prefer a well-designed AVL system as opposed to a portable hodge-podge system. So what is the best way to make upgrades to your hotel conference room audio-video system without losing your shirt in the process?
Wind Turbine Noise | Residential Vs. Commercial
Who Can See the Wind?
Who can see the wind? Neither you nor I
But when the leaves are trembling
The wind is passing by!
Who can see the wind? Neither I nor you
But when the trees are bending low
The wind is passing through!
by Christina Georgina Rossetti
As this children’s poem points out, the wind’s affect on the surrounding environment is a beautiful thing. But if you live near one of the many “wind farms” popping up all over the country, you may disagree. If that’s you, then “seeing the wind” means 400 foot tall wind turbines interrupting your landscape, and “hearing the wind” may mean loud “whirring” and “whoosh” sounds keeping you awake at night.
Video Screen Backdrops are the new Stage Designs for Churches
Decorating and designing stage sets for church sanctuaries can be a daunting task. Let’s look at a brief calendar of the church year. Traditional Christmas services are followed by volunteer holidays and a New Year celebration. There may be a Super Bowl Sunday and then a candlelit Maundy Thursday followed quickly by an Easter sunrise celebration. You’ve got weddings, funerals, baptisms, baby dedications, and on and on. And most importantly, you’ve got the “normal” weekly church services and sermon series to keep you busy. Even the best decorating committees have trouble keeping the pace. So how can you make it all work?
Psychoacoustics: Annoyance from Tonal vs. Broadband Sounds
For today’s topic, let’s think of driving our car with the wind rushing by, when all of a sudden our attention is drawn by that annoying squeak coming from the dashboard. The changing of the squeak with time was the topic of a recent blog, but this time we’ll examine its tonal nature.
Industrial Paging System Safety Code Requirements
Generally speaking, sound systems in industrial spaces are there to serve two purposes. One is to reproduce pages for people in the plant to hear. The second is to play background music for people to listen to. For years, it’s been about that simple. An amplifier, maybe a small mixer, and a few paging horns were all you needed. But the “rules” for industrial sound systems are changing, and the safety requirements are getting much more complex. How complex are these safety requirements? I’m glad you asked.