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Last week I was asked “Would it be possible to build a Diaphragmatic Absorber inside a couch as most studios have one”. Well it’s a great idea and we do it all the time in home theater systems. We put the low-frequency absorption under the seats but we build platforms to do that. Now that said you could build diaphragmatic absorbers and then sit cushions or something, on that. Building it into a couch with springs and foams and all that, no. You’d have to build the diaphragmatic absorber as a separate unit and then put some cushions or something more comfortable to sit on and that would become your couch. But you can’t put it in a regular couch because diaphragmatic absorption and a couch are just completely different construction technologies.

So you build the absorber separate and then create the comfort area on top of it. Here’s another thing you have to think about, where’s the couch located in the room? Is that the place for low-frequency absorption? Just because you have an area that’s available for acoustic treatment doesn’t mean that’s the area you need to treat. People make that mistake a lot of the time.

“Well I’ve got space over here so I’ll just put the low-frequency absorber here” or “Just put the low-frequency absorber here cause we have room for it over here”. Well whenever I hear that, I get a headache because having a space available to put room treatment in does not necessarily mean that you know that’s where the room treatment should go.

Dennis Foley

I am an acoustic engineer with over 30 years’ experience in the business. My technology has been used in Electric Lady Land Studios, Sony Music of New York, Cello Music and Films founded by Mark Levinson, and Saltmines Studios in Mesa, Arizona, along with hundreds of others.

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