Phone System Upgrade – August 5, 2014


AcousticsFirst-Logo-4x5Greetings from Acoustics First!

Our office will be undergoing a Phone System upgrade on Tuesday, August 5th, 2014 – from 9:00 AM -12:00 PM EDT.  

There may be an interruption of service during these hours.

We will still be able to be reached VIA e-mail, and online at www.AcousticsFirst.com

We are sorry for any inconvenience this may cause our customers, but we are doing our best to keep the interruption to a minimum.

If you have a pressing issue, please plan ahead and contact us on Monday before the upgrade, or you may have to wait until after the upgrade on Tuesday.

Thank you for your understanding, and hopefully our new phone system will help us to serve you even better in the future.

-Acoustics First

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Yokumtown gets Peace and Quiet

Yokumtown Church of God had a bit of an issue with their multipurpose room – They couldn’t understand anything anyone was saying.

While the space was designed well with a full court, dampers on the HVAC, a stage, movie screen and a good speaker system – they couldn’t overcome the poor acoustics of the space.  A great deal of work had gone into the design and they wanted an unobtrusive way to treat the acoustic problems… enter Acoustics First.

We started the work of gathering information about the space; dimensions, some pictures and a few balloon pops.

Here’s what we got.

Big Gym - perfect example of a common problem space.

Big Gym – perfect example of a common problem space.

Wow! This room is big, all the surfaces are parallel and hard, there’s very little to break up the sound… You can almost imagine what it sounds like.

You actually don’t need to imagine. Here’s a balloon pop. CLICK HERE!
What you’re hearing is about 3.5 seconds of reverberation after the balloon pop. (Not good.)

So, whatever shall we do? How will we tame this space?!?!?! Will they ever be able to have movies for youth groups!?

Sure they will! We have Joe. You remember Joe from the Sabot School Big Room Big Boom Post?

Well, I would say that Joe has a 6th sense for hearing, but since that’s one of the 5 standard ones anyway, we’ll just say Joe has great ears – and they should be.  Joe’s been using his ears as his primary tools for the past 40+ years; from Studio Engineer to Acoustic Engineer. His ears are tuned instruments, and we rely on his expertise with them to get the job done right – time and time again. (He also makes a mean spreadsheet.)

So after listening to the room, looking at the data, and running some numbers – Joe magically answers the question of what do they need?  (Ok it isn’t magic – Joe’s just really good at this… did I mention his spreadsheet skills?)

When he says, "this is what you need," he also shows you what you have and what it will do.

When he says, “this is what you need,” he also shows you what you have and what it will do.

So Joe says, “You put 280 – 4’x1′ Cloudscape®baffles up on that ceiling and you’ll bring that room down from about 3.5 seconds to about 1.5 seconds.”

Joe knows.

So, Yokumtown goes from a 3.5 second balloon pop (Here) to a 1.5 second balloon pop (Here).

Not only does it look great…

NICE!

NICE!

… But now they say that they can watch movies and it sounds just like you’re in a movie theater.

That’s about the best compliment you can give us.

(And the best compliment I can give Joe is, his calculation for RT60 time was about 1.5 seconds.  When I ran the measurement of the “treated balloon pop” – I got 1.501 seconds.  This is why we have Joe – he can tell you what you will get, before you even start!)

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Barrett’s Technology Solutions has a Happy Easter

Sometimes at Acoustics First we get a call from someone who is so knowledgeable that we can’t help but be tickled that they called us to help them.  We received one such phone call from Pete Heskin at Barrett’s Technology Solutions  in Naperville, IL.

Pete and his team were putting together an acoustic treatment for a listening room at their facility and wanted the room’s acoustics to really showcase their lineup of high-end audiophile speakers.  No joke here – these guys have over 50 years of experience in the audio industry – and they keep on the bleeding edge of audio and video.  This treatment is serious acoustic business – and these are some of the most discriminating ears in audio.

Happy Easter guys!

Happy Easter Guys!

Happy Easter Guys!

In keeping with their high-standards and cutting edge approach, they were looking for an acoustic treatment that is as visually stunning as it is capable of treating a room containing some of the world’s greatest sound sources. As you can see, the results are simple and elegant.

The room contains an array of Sonora® panels, Silent Pictures® and clusters of ArtDiffusor® Model D‘s to make this space sound as good as it looks.  (While all of their gear makes the gear junkies at Acoustics First drool…)

So, if you find yourself near Chicago, or on a “Wayne’s World” pilgrimage,  stop into Barrett’s – and if you fancy yourself an audiophile – put your money where your ears are, and hear how discriminating ears listen to music…

… No Stairway to Heaven.

 

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Phones and Scones? I mean… Phons and Sones!

Since it’s been a while, I have received approval to write about phones and scones – yummy! Oh, I misread that… I can talk about phons and sones? Oh boy. I mean… hmm… uh…

Every so often, you get exposed to a term that you’ve never heard;  it seems like someone just made it up – and the more you learn about it, the more made up it seems.
(Disclaimer: I swear I didn’t make these up.)
Today, I will introduce you to two of these amazingly real terms, and do my best to explain why these terms exist… prepare to be amazed!

OK. Phons and Sones are two related terms in Psycho-acoustics that refer to how humans perceive the “LOUDNESS” of sounds. These are actual real concepts. (Stop laughing.)

Don’t we all perceive sound differently? YES!

So how can you have an actual measurement based on something that everyone perceives differently? EASY!

Take a bunch of people.
Play a 1Khz sine wave.
Play another frequency.
Ask them if it sounds just as loud.
Repeat. (No kidding.)

OK, this is over simplified…  Let’s start by setting some rules that make this a little easier.

For reference – whatever dB level that 1KHz wave is will be the reference for the whole group… compare a bunch of frequencies at different levels to 1Khz at 40 dB – and we’ll call all the ones that sound just as loud the “40 PHON Equal Loudness contour.”

Why? Because they sound just as loud as the 1kHz wave at 40 dB. (I’m not joking!)

Then compare a bunch to a 1KHz wave at 50dB and call all of those that sound as loud, (wait for it)
the “50 PHON Equal Loudness contour.”

Then 60dB, 70dB, 80dB… etc (see a pattern?)
Now, plot all of these from a bunch of people who hear pretty well… take an average and WHAMMO!!!

The PHON Equal Loudness contours!

Equal Loudness Contours.

ISO 226:2003 Equal Loudness Contours.

(To be fair this is the data from a bunch of 18-25 year olds who still have reasonably good hearing…)

Remember this is PERCEIVED LOUDNESS. The average of what the test subjects said “yeah, uh, that’s just as loud, Dude.”

It seems strange doesn’t it – that these aren’t nice straight lines? That’s because the human ear is constructed in such a way to be more sensitive to certain frequencies than others.

So according to this chart – a 1KHz wave at 40 dB sounds just as loud as 125 Hz at ~60dB and 3150 Hz at ~35 dB. (All on the 40 Phon contour.)

That’s Psycho-acoustics for you. (Wow.)
So if you’re an average person with average hearing, your bass perception is terrible and over 16KHz you’re basically – well… deaf.
But you hear really well from 2kHz – 5kHz!

Anyway… what’s the point?

Phons measure how loud the human ear perceives sounds at different frequencies. (TADA!)

FINE! –  then what are Sones ? To make this simple – Sones are relabeled Phons.
You start with 40 Phon being 1 Sone then double it every 10 Phon.

40 Phon = 1 Sone.
50 Phon = 2 Sones.
60 Phon = 4 Sones.
70 Phon = 8 Sones.
80 Phon = 16 Sones
90 Phon = 32 Sones
100 Phon = 64 Sones
Etc.

(Hmm, thought that would be more complicated? It is – but that’s basically it in a nutshell.)

You will almost never see a phon or a sone. Bathroom exhaust fans and blowers are sometimes rated in Sones – to let you know how quiet they are… The problem is that no one actually knew how quiet that was until now!

I guess it sounds better to say –

2.5 Sones! Wow that's Quiet!

Quiet… Only 2.5 Sones!

“This bathroom fan operates at only 2.5 Sones!”

…Than it would be to say…

Quietish... Only loudish in frequencies you can't hear well. So it's not bad... Really.

Quietish… Only loudish in frequencies you can’t hear well. So it’s not bad… Really.

“This bathroom fan resonates at over 80dB,
but it’s in a frequency range that humans don’t hear very well,
so it sounds quieter than it actually is… no… really!”

Human perception of sound is very important to the development of acoustic products – Psycho-acoustics are not a joke.
(Why are you still laughing?)

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Season’s Greetings!

Acoustics First would like to wish everyone a happy holiday season, and a happy new year.

Seasons Greetings from Acoustics First

- Acoustics First Team

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