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question about backplane material on an acoustic panel

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jasonlechak

Acoustics Pro

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February 15, 2017

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August 14, 2017 - 10:48 am

Hi everyone!

I have 14 acoustic panels around our studio – 2 inch thick roxul mineral wool. Works well. The backplane is made of a thin (1/8 or 1/4 inch thick) wood.

My question though is, would one or two layers of MDF be more efficient/useful as a backplane vs. the thin wood? How about an MDF sandwich, with material in between two layers of MDF, say, 1 inch thick roxul mineral wool or
some other acoustic material? Just curious if there would be any benefit to this approach.

Thanks!

Jason

Dennis Foley

Chief Acoustics Engineer

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August 12, 2013

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August 15, 2017 - 7:11 am

J, It is the depth of the device and the absorbent coefficient of the material you are using that has the largest impact on frequency response. It do not have any experience with using different materials of different densities in this manner.

jasonlechak

Acoustics Pro

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February 15, 2017

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August 15, 2017 - 9:53 am

Thanks Dennis.
I will see if I can find the absorption coeffients of both materials.