AVLAdmin, Author at AVL Designs, Inc.

Does Solar Power Make Noise?

solar panel field

So, let’s talk about solar power. Does solar power make noise, or doesn’t it?

We had someone approach us recently by email saying “Hey, we just need somebody to do a quick noise study. Shouldn’t be any big deal. Hopefully you can knock it off in a day or so.” My response was “For what?” I quickly learned that it was a solar farm that has 12 gazillion acres of panels going into an area which is rural and has a community noise code. Look at my previous video. This was a noise code that basically says, “make sure nobody is bothered.”

Power Supplies Always Make Noise

I didn’t know a whole lot about solar power, but I do know about electrical devices. I know that dimmers, inverters, and any kind of power supply always makes noise. The bigger the power supply, the bigger the noise. The frequencies are dependent on the voltage at which they operate – what load they’re operating at.

Most things, oddly enough, make more noise at half-load than they do at full load. So, I had to do some research before I even took the project. I went online and found that on YouTube there are some great videos when you search for “solar farm noise.” There are some good ones that were measured very close to, or video shot very close to, some of the solar farm equipment. The video revealed some really annoying 3 kilohertz and 6 kilohertz buzzing noises that came out of all this equipment. Now, knowing what we were dealing with, it seemed that we should be able to calculate where would be a problem. The town code didn’t really define proximity to the noise. Was the code referring to where people live or was it about the property lines because the properties people own there are farms and they are huge. Some of this equipment is operating let’s say 300 feet from a property line, but it’s 2000 feet from the nearest house.

For Sure, This Thing Was Going to Buzz

What we were starting with is that we do know is that this thing was going to buzz. We were told that there were a ton of these inverters going in and they also had fans in them so that, so when they start overheating, they would cool. But how do you figure out when this is occurring? Our next move was to contact the manufacturer and we got a number from them that is just a dBA number at a particular distance. Well, that wasn’t helpful. We needed more data. So, we sent them an email asking for FFT narrow band data and explained that we needed to know how they took levels on the other equipment. We needed measurements on all sides of the inverters to determine which side the noise was coming from. They denied our request.

Thinking that was kind of odd, we then went to their website and found that they have a white paper explaining how they are working to reduce the noise of inverters, which says to me they know they are noisy and that is why they didn’t want to give us the data. We explained to the people we were working for that with just dba we couldn’t know what frequencies are in it. We didn’t know if we were looking at fan noise in their number. Are we looking at fan noise with inverter noise, like buzzing? Are we looking at transformer noise from all the transformers on the site at lower frequencies? We didn’t know what we were looking at.

You want us to sign a what????

We found out that the only way they would provide this is if we signed an NDA, a non-disclosure agreement. What those mean is that any data they give you, you can’t disclose to anybody else. We couldn’t use it in our measurements, and we couldn’t use it in any of our reports and summaries. In my world, and I know that not everybody agrees with this, this means they are probably hiding something.

So, when people talk about solar power and how wonderful it is, it may be wonderful unless you live next door to it in the wrong orientation. In our final report we basically gave them lots of warnings. We explained frequency content and we gave them links to videos on YouTube where they could hear what we’re talking about. We added that we could not predict when and where it was going to be or at what level because we simply could not obtain that data. We did have the dBA numbers, though, and even those were higher than they should be at what we considered to be locations of concern.

Now let’s imagine we are talking about a neighborhood, and somebody wants to put a bunch of solar stuff on their roof with a small residential inverter. If they don’t put that inside their house and it ends up outdoors somewhere, we’ve seen some data online of some of the residential inverters where they rate them at say 50 dBA and they’re more like 80 under certain load conditions because of the buzzing noises. Some manufacturers are very good, some are very poor, so it is kind of a buyer beware thing.

Even if you are putting one in your house, if the inverter ends up inside your house and it’s making 3 kilohertz and 6 kilohertz of noises, go watch some of the videos online where they are installing it inside a house someplace. Obviously, the noise only happens when the sun is out. At night it is not going to be making noise, but during the daytime it can produce a significantly annoying noise if it’s loud relative to what else is going on in your house.

Again, we would say “buyer beware.” Solar does make noise and whether it’s a problem or not depends on where the equipment is placed, how loud it is, and a large number of other factors that are environmental. Just don’t commit to it without thinking your way through.

How To Avoid Bad Acoustics

When it comes to acoustics, it’s quite common for us to get a phone call when something has gone wrong. It seems like 9 times out of 10 somebody has proceeded on a project, and they have taken a direction — they have “done some things” — and now the end-user is not happy. Whether it is a performing art space, or music space or an industrial application, when the complaints start coming, that’s when we get hired. To be honest, it’s really the wrong way to go about doing things. What should be happening is they should hire an acoustical consultant first, before they design the project. But in a lot of projects the end-users are not speaking up. They never say, “Oh by the way, I’m really concerned about sound.” Or “I’m really concerned about this or really concerned about that” so the architects and engineers don’t even think about what the changes of finishes and dimensions may do to the sound in those areas until it is either too late or almost too late.

Let’s talk about one situation that came up very recently. We got a call from an architectural/engineering firm about an auditorium that they were “renovating” “acoustically.” I put those words in quotes separately because the meaning of each can be obscure, to say the least. It was a conference call and, during this call, somebody asked if did they did the right things? So, I asked “what is the reason you’re doing this?” Their answer was “well, the room needed to be updated.”

Next, I asked them “what about the people who use the room? Do they like the way it sounds now?” We had visited it and It’s a nice, kind of average auditorium. It has absorption on the back of the room, including a cavity that goes out the room to an outer lobby in some locations to provide some added resonance out there. The sidewalls have some absorptive panels that are on standoffs from the wall to absorb lower frequencies than they would without it.

Listen! The actual users already liked the way the room sounds!

No one ever asked the end users, do they like the room? Well, it turns out in this case they do. The plans in the works were about to change all that. This is a drywall room with a drywall ceiling, which means low frequencies are being absorbed through the drywall. The music department of this particular school likes the space. The changes that they were about to make are so radical that we were compelled to draw their attention to the drawbacks. We said, “look, you really need to analyze this before proceeding.” We do our analyses by conducting field testing. We take the existing condition, which the end-users like, and we compare that to what the estimate in a model says it will be once the proposed changes are implemented. I believe, for the sake of everyone concerned, this is the prudent way of going about things. The “look before you leap” method.

Before Making Radical Changes, First Test It Out.

We suggested that we test, report and evaluate just what they would have, if they applied the changes they wanted to make. The plan was to treat the whole back of the room. They were going to take the perforated section that absorbs all sorts of energy, and they were going to make that solid. Next, they were going to curve it. Plus, they were going to cover it in ceramic tile “because it is durable.”

But not everything that seems like a good idea is a good idea. The plan was to have ceramic tile up to about 12 feet off the ground. Then above 12 feet, they were going to place acoustic diffusion using a product that has a relatively non-absorptive characteristic. It is a great diffuser, but diffusers should be placed down low on the wall, where your ears are. Putting 12 feet of ceramic tile below and all this diffusion up above is at an elevation where nobody is going to get the benefit. It will diffuse some sound and that will then bounce off the ceiling. And all of this is going to make the room far bass heavier than it is now. It’s also going to add strident high frequencies because, believe it or not, drywall still has a small absorption coefficient even up at high frequencies. So suddenly you are going to have this room with a twang to it and diffusion occurs where no one sits. And this giant curve to be added to the back of the room will create a major echo back to the stage. So, we are truly hoping they hire us to solve this problem before it occurs.

Before making decisions, ask the end-users what they hear!

One of our ways of dealing with this is to send the end-users a questionnaire with guided questions to get a sense of what they hear. It is hard when you don’t get to meet with the people and hear a live performance where you all can talk about it and say, “Hey, what are you hearing?” But we do our best. What do you think about this? What do you think about that? And then we’re hopefully going to guide them to make changes that are in line with what the end user wants acoustically the result they’re looking for as opposed to a visual that somebody thought would be cool. Sometime manufacturers reps get involved in this process and they will say, “Hey, here’s a cool looking product.” And they will make a lot of money if you buy it. And then they will put it all over the room and they don’t think about where it goes. And the inevitable complaints shall come.

The general rule of thumb for auditoriums is “down low” for reflective and diffusive surfaces. Where they get placed depends on more than just the room. It also gets placed based on the sound system and where speakers are bouncing off the walls, things of that nature. Typically, speakers go way up high in a room. If there’s anything up there, it’s absorption. Usually, it is relatively thin absorption to pick up high frequencies before they hit the ceilings and create kind of this weird after-ring-sheen that a lot of rooms have. So that’s kind of a general course, but what we’re hoping we’ll be doing is modeling it, finding a correction before it gets built. But my advice here is if you’re going to change a room, talk to the people who use it. If they say, “look, we want this room to be X” or “we’re happy with this room” you better be sure that what you are doing doesn’t change the way the room sounds. If you want to change it visually, that’s great. A coat of paint can do that. But don’t start putting in materials with an unknown characteristic.

By the way, the YouTube version of this is a fireside chat: How To Avoid Doing Bad Acoustics – A Fireside Chat with Seth Waltz We have a lot of other videos on various subjects. Please watch and subscribe to get the most current videos.

We Told You So

When I was creating this post and video, it was obvious that only one title would do: “We Told You So!” Please don’t mistake this for arrogance. What you are hearing is frustration. We have been telling people this for a lot of years.

digital lighting board

I had to go out last week on a site visit for a client for whom we designed a variety of systems some 15 years ago. The design included dimming and lighting controls. We did video. We did audio. We did electronic acoustics. I don’t remember everything we designed for them, but it was a lot. Absolutely for sure, as we do with all of our clients, we always warned them “You are getting all this new stuff and, if you’re lucky, it may last 10 years.” Sounds dismal, doesn’t it? They just got new. They haven’t even had time to play with it and now we are giving it an expiration date? Well, if we are going to do our job right, we have to tell them that! With upgrades, and plain old “wearing out” a day will come when things will begin to fail.

So, as the end user you have to think about a lot of things. Number one, we always tell people when they get an audio console, DSP or a lighting console, which has memory capability, they have to make incremental backups to USB drives. And by “incremental” we mean at least weekly.

So, over 10 years time that will be 520 back ups! “That’s too much work” you say. Well, how much will it cost you if you have not backed it up and with time it, most probably, will fail and no longer be usable? The smart person who follows through and makes the backups will be able take that file and load it into another product of the same type. This will get you up running again.

That best-practice was the good way of looking at things, right up until Covid. The pandemic added a new urgency to those methods, but we’ll talk about that in a minute.

So anyway, let’s get back to the client I was just telling you about. First of all, the dimming system we recommended for the job was substituted to save money.

Sadly, they bought a product that we did not want to allow on the project. Unfortunately, New York State’s equal bidding process never takes into account serviceability and long-term reliability of equipment. Experienced consultants know the likely pitfalls and will guide their customers toward better decisions. Nobody asked us when the substitutions were made on this one.

So, as a result, the dimming system they have is now failing. To add to it, all of the lighting in their room is still incandescent because it was installed 15 years ago and LEDs pretty much didn’t exist at the time. (The ones that did exist were pretty poor.) This is now an auditorium where at any moment they could have a single-point failure, taking out all the lighting in their room. Any single point failure we mean the dimming rack control modules.

A typical dimming rack has lots of dimming modules and they just do what they are told. They get their signals from a brain ( control module). And if that brain fails, you are toast! All of your lights are nonfunctional.

That is one of those events that we were warning you about. We have always told people to buy the rack and buy a spare control module, as well. There are 96 dimmers in it. The chances of all of those failing simultaneously is relatively slim. The chances of the control module that runs the whole thing failing is a lot higher. So, please, just buy a spare.

At the time the cost of a spare control module was a few thousand dollars on a multi hundred thousand dollar installation. Seemed like smart move to us. You put it in a box, store it somewhere, have it available for a time, like now, where bad things are happening all over the world.

Of course, they didn’t do any of that. The other thing they did not do was make any backup to their audio console and, therefore, they weren’t saving backup files of what is in their audio console.

They now have an older digital console that is failing. It’s sad.

And there is the added problem of signal, which is how it gets from point A to point B. We’ll talk about that a little bit more in a minute. To recap, you have these single-point failures: the console dies, audio system is down, dimmer rack, front end dies. All are down.

As well as the digital signal processors that tune their line arrays. Same thing here. Speakers are going to last a long time. Amplifiers are easy to replace, and you don’t have to have the exact same amplifier that you had when you put the system in. The DSP is very specific and requires a file load. If the DSP fails all the precise tuning of the stem is gone.

They didn’t buy a DSP either because the idea of having backups and support is not something that school districts think about for auditoriums.

So, they have this equipment failing and now that it has become a critical situation, so they came to us.

They told us they had a $30,000 budget to do something but, here is a new wrench in the plans, there was Covid. With the supply chain debacle, most of the things that are needed to remedy their situation cannot even be purchased. There was the China problem, the people who went out of business problem, the “you can’t get parts for things” problem. So where it should have been doable, now our clients were faced with only $30,000 they could spend and $200,000 worth of problems.

With all of those obstacles in the way, it was time to figure out workarounds. And we’ve been figuring out some pretty crazy workarounds for people lately to help them get past some of these things.

Workarounds are nice, if there are any. Sadly, there will be no way out for a lot of people.

It is time to get back to some of the things we have been telling people for years and, from this point on, everybody should take this advice more seriously.

Get backup equipment.
You just have to buy it.
Do not delay.
Buy critical components.

Here is a real life scenario: there is an audio console with eight physical inputs on it and digitally up to 164 inputs coming in from stage boxes. I was out at another job site the other day where their stage boxes failed. That means that they have no physical connections at their console. They have stage boxes and they can’t get the stage boxes to talk to their console. (not all stage boxes speak the same digital language )

So those who have depended on only one way to get their system to work truly are in jeopardy. A catastrophe is lurking around the corner.

When the digital revolution began we would tell people “If you’re going to put in a digital console, leave your analog snake somewhere. You might want it.” I think I actually said, “Someday you might want this.”

Well, someday is now. If they listened to the advice, I could have walked in with some old whatever, like a Mackie 1604, and at least have gotten sound out of a system for them. Now they have no way to get signal from the stage to the booth because they wanted their analog snake gone. “It’s old technology. We need to get rid of that.”

Enough ranting about that. So when you look at the single point failures in audio systems, you’ve got stage boxes, you’ve got consoles.

Let’s say you own a Behringer wing, which is working at the moment, and I back up files. The question is can I rent or buy a wing if I have to?

So, the first thing you want to think about is using equipment that is available on rental from people nearby who rent equipment. But unfortunately, in the bidding market, they can’t use that as a parameter for why you do or do not accept a substitute product. So, you might end up with, let’s say a lighting console that fails and in the future your files won’t go in any console you can rent. Now, being that things are DMX, in most cases you can usually get things up and running if you happen to be using CAN that can be a little more difficult if your console doesn’t work well with the version of ACN that somebody may have installed.

But if you don’t have any of those options, you are just out of luck. You have no lights. So, at that point you’re getting out candles or you’re getting out flashlights, which is lots of fun.

In many cases the average high school we do could have like $1.6 million worth of new equipment going into a project. And the backup equipment they ought to own is let’s say $35 – $40,000 but they don’t buy any of it. And then something like Covid comes along, which no one ever expected. In this scenario, manufacturers may or may not even survive.

Now let’s talk about that a little bit because in the middle of Covid (in our world we are still in the middle of it) we have multiple installations going on right now that are stalled waiting for key products to come in that can’t be delivered.

So let’s just say you had a very specific audio console that needed to be this many inputs to work with these kinds of stage boxes and let’s just say the stage boxes showed up but the console didn’t. And the stage boxes are Dante and the console you were going to get was Dante.

But now you can’t get that. So, now you have to buy another console somewhere or get a console that is Dante but maybe you can’t find one. And now you’ve got cat 5 wiring, which is great, but you own a bunch of stage boxes that won’t work with your console.

In the current climate, one of the new things is a new wrinkle beyond just backup. It’s the “which standards am I going to work with?” wrinkle. So if I’m going to work with old school DMX, which to be honest I think in a lot of applications is smart, if you don’t need tons of channels. You won’t have to worry about a console specific ACN network and whether or not your system will talk to it, you can just hook up DMX and use anybody’s controller to get something to come on.

With audio analog snakes, they’re a great idea. Have analog backups running from your stage to your, your stage rack where, worst case scenario, you patch a bunch of XLR’s together and you can actually get sound out of things.

So, it’s kind of interesting looking back at the many years we’ve told people this and everybody ignored us and now we’re being faced with multiple people contacting us. Very recently it’s been starting to happen with “I got this problem” and “I’ve got that problem.”

I was just at one the other day, their digital signal processor on their PA system died. They never saved any of the files. So, they don’t know what any of the filters were when it was fine tuned by a bunch of experts years ago and they can’t get the DSP that was in their system anyway. Even if they had saved the files, they are still toast.

So if you own something that is using whatever filters, patching, whatever it might be, here is your homework (due immediately.) Create Hard copy Excel spreadsheets of settings. They’re a pain in the to do. Most consoles and equipment will not spit them out for you in any fashion. But having that information such as “how is my dimmer rack patched?” in a pinch is pure gold! How is the DSP set up in my system? Hard copies are paper copies. And I know that’s like it, it’s like, they’re saying this ? “You must be a dinosaur talking about paper.”

Trust me, it makes sense. I had one of our who clients contacted us where their DSP failed at a site down in Washington DC. We had to dig out a Windows 95 laptop to open the files, but we had copies of the files that they didn’t have. So we were able to send them a hard copy spreadsheet of all the parametric EQ settings, delay settings, all the, all the tricks that were used to tune their sound system so they could get a new DSP and get it up and running again.

Time to Be The Champion

Please, I cannot stress this enough. Be the champion. Backup, backup, backup. Back up equipment, data hard copies, these are the things that save you and get your venue running when everybody else is scrambling.

WXXI Audio Production 225

WXXI TV reached out to AVL Designs Inc. to design the interior acoustics and assist with noise control in their product 225 control room. They had recently purchased an AVID S4 Yukon console for the suite and wanted a control room that provided a better mix environment.

WXXI production suite

LIMITED HEIGHT The space is an unusual shape with some features that cannot be changed. The oddly trapezoid room with one glass door to the side of the mix position, and a large window to the live room that could not be relocated, was limited in height. It also had an electrical panel that could not be covered for code reasons.

WXXI Production Suite

NOISE The first order of business was HVAC noise control. The background in the space was NC 40+. Ductwork design was what you see in office spaces, not studios. Working with their mechanical contractor we determined to enlarge ducts, change diffusors, move VAV’s, and control velocities. The result ticks in at NC20.

WXXI Audio Production Studio

LAYOUT The new space was to have a mix position and a client listening position in the rear of the space, where it narrows considerably in a “V”. To even out response, we determined to use high order quadratic diffusors on the back wall. An electrical panel presented a problem. It could not move and had to be accessible. Some of the broadband quadratic diffusors were designed into a custom designed rolling cart. This allows them to go over the electrical panel but be legal as they could be moved. This allowed matching the rear sides of the space with broadband diffusion. GUD high frequency diffusors on side walls and the ceiling over the mix position to enlarge the mix image area back to the client desk. The sound at the client desk is just as linear and only down in level by 3dB from the main mix position. All products were from Real Acoustix LLC. Due to the door location and the “V” in the rear of the room, typical placements for bass traps were negated. We decided to use bass traps within the celling system, a bit unusual but it worked. Overall response is very linear, and only two subtle filters were used to final tune the Rogers LS3 main speakers.

WXXI Audio Production 225 sign

One note: Most of the install was done by in house WXXI audio engineers. Andrew Croucher and his team did a spectacular job on this mix suite.

Andrew Croucher – WXXI
Paul Houndt – Carpenter (Contractor)
Greg Carter – WXXI
David Lot – WXXI
Russell Roby – WXXI
Bryan Agnello – WXXI
Ruth Watson – WXXI

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Liverpool Central School District

AVL Designs Inc. first became involved with the Liverpool Central School District in 2007. We were asked to investigate echo problems in their auditorium. When someone would play a snare drum or any other percussive instrument on the stage, you could hear 7 to 12 discrete echoes that were hard to miss. It was like bang…… bang, bang, bang, bang, bang, bang, bang. Of course, this was a problem. The echo occurred in certain areas of the room, not every area of the room, but it was so noticeable that this defect got in the way of most musical performances.

We corrected this by testing the space and then placing specific acoustical panels on sections of ceilings and side walls, effectively eliminating those echoes. When you add absorption to a room, you lose some of the liveness. It is an inevitable trade off when getting rid of the echoes. You lose some of the reverberation.

In the process of time, we talked with the school district about other corrections that were available in the realm of electronic acoustics, which we have done successfully for other schools. After meeting with the music department, we decided to implement an electronic acoustic system in the space. Due to budget constraints, it was ceiling installation only. No side walls, no stage shell, but it was designed to allow a much more immersive sound quality for certain kinds of music.

The room was lacking low frequency response. The reverb time was around one second in the midrange, and it needed the ability to go to higher reverberation times for certain styles of music and types of theatrical performances. Once the system was installed, the school was thrilled. They were so enthused about it that they became a major proponent of this technology, sharing their experience with other schools we met with in the future.

As 2016 arrived, a major renovation was planned for the Liverpool Schools. They were enlarging the entire auditorium, refurbing the music department and adding some additional rehearsal spaces. As a result of our prior experience and success with their existing auditorium, AVL Designs Inc. was brought in along with the architect, on the early stages of this project.

Electronic Acoustics added almost everywhere.

There were a number of goals for the project, the first of which was to include electronic acoustics in many locations. It would not only be the in the auditorium and on the stage, but also in the large rehearsal rooms for orchestra, band and choral ensembles. That way the singers and musicians would be able to rehearse in environments similar to what they would experience in the auditorium.

Electronic Acoustics Explained VIDEO

So, that became the initial driving force for the acoustical design. We had to look at how to treat the main auditorium to get the reverb time low enough and flat enough that when we implement the electronic acoustics, there will not be significant problems with frequency balance and reverberation curves.

The electronic acoustics system is based on Yamaha acoustic field correction devices. It is implemented with speakers located onstage, in overhead ceilings, in under-balcony ceilings, and on sidewalls. These systems are providing reverberation as well as early reflection support for the room. The system can also add voice lift to allow for events without sound reinforcement.

Bigger auditorium, curved walls and NEW balcony.

The auditorium was being dramatically enlarged, shaped with curved walls plus adding a balcony. To deal with that condition we developed a custom absorptive diffusive wall treatment. It consists of series of wells of different depths with perforated materials and solid materials, creating a diffuse sound field within the auditorium and generating a relatively low reverberation time for the size of the room. This design criteria was also used for the music spaces to produce similar reverberation curves for their base conditions. That way, when the electronic systems are commissioned, there will be tunings for each space that will mimic each other to the degree that you can mimic a smaller space to a larger space. In addition to the electronic acoustics and physical acoustic designs for this auditorium, AVL Designs Inc. was contracted for stage rigging, theatrical and house lighting, and sound and video in the space.

Huge Speakers? Here’s why …

One of the unusual features of the room is the incorporation of Danley Jericho loudspeakers. The Jerichos look huge and indeed are huge, but they are actually a replacement for line array technology that many auditoriums would implement, at a lower cost and a higher performance level. The Jericho combines a large number of drivers in a single large enclosure, creating an output pattern and sound pressure capability similar to a 12 element tall, mid to large scale line array.

Admittedly, it looks a little odd to have boxes this big in a high school auditorium however the pattern control over the wide frequency range of the speaker allows it to cover most of the main floor as well as the balcony without the need for other devices.

*We did, however, install over and under-balcony delay fill speakers. This was primarily for potential special effects for theater use, and also to add the few frequencies that would be missing as you go by distance to the back of the room.

The audio system is being fitted with an Allen and Heath D Live console, which is a substitute for a Yamaha console originally specified. (Due to Covid issues the Yamaha console is not currently available) The D Live is a great console and will do a fantastic job for the school in the new application.

Theatrical lighting consists primarily of Electronic Theater Control products and High End systems, with some Strand and Phillips fixtures as well.

Stage rigging is a combination of Brick House counterweights and Electronic Theater Controls Prodigy hoists. The Prodigy hoists are used for onstage electrics, as well as a front of house moving head electric.

All of the music rooms are used as green rooms, so we have a combination of intercom, call lights, and video feeds to each of those spaces from the main auditorium.

Quite a few of these systems are not fully online due to product availability problems in the current post-Covid world that we are living in. We hope to get all of them online toward the end of the year. The owner is very impressed with the space currently. They will be really excited when all of the final details are worked out. The transformation from the original room to what it is now is dramatic.

Burnt Hills Ballston Lake High School Auditorium Renovations

When the Burnt Hills Ballston Lake High School made the decision to renovate their auditorium, the architect requested that AVL Designs Inc. join their team. This appeal was initiated by the owner who had been involved with another AVL Designs Inc. project at a different school. AVL had designed the performance systems which worked so well that they wanted to have us involved.

During the schematic phase, it was determined that the auditorium would have to be entirely gutted. The space would be converted to a “black box” style space with the addition of a balcony and wrap-around catwalks with lighting positions.

Room acoustics were to be managed with the use of electronic acoustic systems. For electronic acoustics to succeed, there must be very low noise in the space, and an acoustically neutral response from the room itself. AVL incorporated acoustical absorption on the roof deck and walls to control the room response.

Working along with the mechanical engineer, AVL Designs Inc. was contracted to do ductwork noise modeling. The final system is so quiet that it is inaudible.

Audio systems include an Allen & Heath Avantis Console, Danley Loudspeakers, Ashly Audio DSP and amplification, and Shure QLX D wireless systems.

Video includes projection as well as LCD screens with controls by Crestron and Blackmagic Design, and Robotic Cameras by Panasonic.

Lighting is based predominantly on products from Electronic Theater Controls, Hi End Systems, and Strand Lighting.

The electronic acoustics system is based on Yamaha AFC. Due to covid delays, the commissioning will be this fall.

Covid related product delays also forced AVL to assist in coming up with workarounds as some products will arrive 6 months or more after the facility begins to be used. Such is life these days, but workarounds are getting the job done.

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Author: AVLAdmin