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Hi everyone.
I'm Dennis Foley from Acoustic Fields. What we're going to do today is to talk about the
power of diaphragmatic absorption. Diaphragmatic absorption is a technology we use and have
developed. It's also a common technology used in recording studios and builds to absorb
a lot of lower frequency energy in a small amount of space. We're going to use an example
today to show you the power of diaphragmatic absorption and how well it works.
To do that we are going to start with a 50 cycle wave. We know that every wave has a
particular wavelength so we're going to figure out how well diaphragmatic absorption works
well with 50 cycles.
So let's take a peak at how long a 50 cycle wavelength would be. Speed of sound at 1130
ft/ sec. A 50 cycle wave is about 20 ft long. So the goal of any absorption technology is
to take that 20 ft long wave and absorb as much of the energy of it as we can in order
to reduce its effect inside of our rooms which we know what those effects are. Room modal
issues, pressure builds up and then we can hear certain frequencies in certain parts
of our music. And we want to eliminate that in our small rooms so diaphragmatic absorption
is a great tool to do that.
So we use our 50 cycle wave and our 20 ft wavelength as our comparitive base and we'll
go from there. Okay, for comparison sake we're going to look at common building insulation
materials that are used to absorb energy. We have ten bales here approximately 2 ft
wide so that would represent 20 feet. So if we are going to absorb 100% of 50 cycles we
would need this much material as you see here. So it's an extensive amount of material to
absorb a 100% of 50 cycles but a diaphragmatic absorber will do it in a much smaller area.
This is a miniature version of our ACDA-12 which is our lower frequency absorbing diaphragmatic
absorber with our activated carbon technology and you can see it's about 15 inches deep.
It's got a 2 inch foam face but from the test results you can see that we absorb 100% of
50 cycles in this small amount of real estate. So all of this building insulation material,
all of this 20 ft, 2 ft, 10 2ft bales we do it in about 15".
So one can see that diaphragmatic absorption is a really powerful low frequency absorber.
And today's smaller rooms, we need that horse power and that kind of absorption because
we don't have 20 ft of space that we can devote just to sound absorption technologies. Thank
you.