📞 Call us for a free consultation! 520–392–9486, 8am – 6pm / Log in or Sign up / Contact
logo for room acoustics forum showing a waveform within a circle and the title of the forum
Please consider registering
Forum Scope


Forum Options

Minimum search word length is 3 characters - maximum search word length is 84 characters
Register Lost password?
sp_Feed sp_TopicIcon
question regarding furnace filters and drywall
Acoustics Pro
Forum Posts: 21
Member Since:
February 15, 2017
sp_UserOfflineSmall Offline
September 25, 2017 - 11:33 am
sp_Permalink sp_Print

Hi everyone!

Furnace Filters:
A few months ago I was at a voice actor’s apartment. He had placed a few furnace filters around his space to serve as diffusion. They were spaced from the wall about 2 inches. The filters were I believe, 18 x 24 inches in dimension.
He believed these work well, but I did not say anything, although I do not believe he verified this scientifically. So my question is, do these furnace filters really offer any measurable diffusion? I don’t think they do but I could be wrong.

Most homes are built with drywall, but most professional studios are constructed of quality hardwoods on the floor, walls, and ceiling.
In the SOWA project video, reference is made to replacement of drywall with hardwood. Awhile back I sent a sample read from our home studio to an audio engineer. He mentioned it sounded like drywall construction due to: (Something I didn’t understand when he said it… :) ). In other words, I did not understand what he was referring to, but it sounded like the drywall was contributing *Something* to the noise characteristics of the space.
So my question here is, what undesirable acoustic artifacts are introduced by drywall construction?



Chief Acoustics Engineer
Forum Posts: 387
Member Since:
August 12, 2013
sp_UserOfflineSmall Offline
September 25, 2017 - 3:01 pm
sp_Permalink sp_Print

J, A furnace filter would act like a middle and high frequency absorber , not a diffuser . It would not have the appropriate rates and levels of absorption for voice. Drywall has a negative impact on frequencies from 750 Hz. – 2,000 Hz.

Forum Timezone: America/Los_Angeles
Most Users Ever Online: 31
Currently Online:
Currently Browsing this Page:
1 Guest(s)
Forum Stats:
Groups: 4
Forums: 10
Topics: 360
Posts: 996


Member Stats:
Guest Posters: 23
Members: 14403
Moderators: 0
Admins: 2
Administrators: admin, Dennis Foley
Call Us 520–392–9486
100% Money Back Guarantee