Acoustic Fields - All Forums https://www.acousticfields.com/acoustics-forum/ Simple:Press Version 6.5.1 Dennis Foley on Mixed Use Room question https://www.acousticfields.com/acoustics-forum/dedicated-listening-rooms/mixed-use-room-question/#p1117 Dedicated Listening Rooms https://www.acousticfields.com/acoustics-forum/dedicated-listening-rooms/mixed-use-room-question/#p1117 P, For Atmos use diffusion on the rear wall and absorption
all other surfaces.

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Wed, 12 Aug 2020 12:02:14 -0700
Dennis Foley on Side distance from BDA unit https://www.acousticfields.com/acoustics-forum/acoustic-treatment/side-distance-from-bda-unit/#p1116 Acoustic Treatment https://www.acousticfields.com/acoustics-forum/acoustic-treatment/side-distance-from-bda-unit/#p1116 Build 16 units and place 4 on each wall.

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Wed, 12 Aug 2020 11:01:04 -0700
Villu on Side distance from BDA unit https://www.acousticfields.com/acoustics-forum/acoustic-treatment/side-distance-from-bda-unit/#p1115 Acoustic Treatment https://www.acousticfields.com/acoustics-forum/acoustic-treatment/side-distance-from-bda-unit/#p1115 Hi! Width 13.8ft, length 16.75 ft, ceiling 8.2 ft. Thank You

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Wed, 12 Aug 2020 03:18:13 -0700
Dennis Foley on Subwoofer in a low-medium/small home studio https://www.acousticfields.com/acoustics-forum/acoustics-discussions/subwoofer-in-a-low-medium-small-home-studio/#p1114 Discussions https://www.acousticfields.com/acoustics-forum/acoustics-discussions/subwoofer-in-a-low-medium-small-home-studio/#p1114 Fill out info in link: https://www.acousticfields.com.....-analysis/

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Tue, 11 Aug 2020 09:05:03 -0700
Dennis Foley on quadratic diffusers https://www.acousticfields.com/acoustics-forum/acoustic-treatment/quadratic-diffusers/#p1113 Acoustic Treatment https://www.acousticfields.com/acoustics-forum/acoustic-treatment/quadratic-diffusers/#p1113 A, 2-D and 1-D diffusion application depends on the distance from the wall surface to ears and usage of the room.

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Tue, 11 Aug 2020 05:40:31 -0700
acr on quadratic diffusers https://www.acousticfields.com/acoustics-forum/acoustic-treatment/quadratic-diffusers/#p1112 Acoustic Treatment https://www.acousticfields.com/acoustics-forum/acoustic-treatment/quadratic-diffusers/#p1112 Let me refine the question. I guess the question is 2D quadratic diffusion with alternating 90 degree orientation of units next to each other, like I see in many of your room builds on ceiling and back walls in particular, vs. 3D quadratic using the same frequency sequences. And the possible difference in application of diffusion with line source speaker systems vs. point source systems for stereo playback only. Some of the manufactures of line source systems, especially planar dipole types, make a big deal of about diffusion having to be very different between the two. I'm not so sure and am wondering what you think.

Sincerely.
Adam Reynolds Boise ID

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Sun, 09 Aug 2020 20:37:09 -0700
Uros on ACDA-10 and ACDA-12 carbon filter barrier board https://www.acousticfields.com/acoustics-forum/acoustics-discussions/acda-10-and-acda-12-carbon-filter-barrier-board/#p1111 Discussions https://www.acousticfields.com/acoustics-forum/acoustics-discussions/acda-10-and-acda-12-carbon-filter-barrier-board/#p1111 Hello Mr. Dennis,
thank you a lot for sharing your knowledge. I really appreciate it.
I would like to ask you if ACDA
-10 and ACDA
-12 absorbers use PEG board for carbon filter barrier like BDA absorber
?

Thank you in advance and best regards.
Uros.

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Sun, 09 Aug 2020 10:08:04 -0700
Lerryn hawki on Can I get your carbon in New Zealand https://www.acousticfields.com/acoustics-forum/introduce-yourself/can-i-get-your-carbon-in-new-zealand/#p1110 Introduce Yourself https://www.acousticfields.com/acoustics-forum/introduce-yourself/can-i-get-your-carbon-in-new-zealand/#p1110 Hi Dennis and team,
I've been hooked on all your videos
and was
Wondering if I could get my hands on your special carbon here in New Zealand when I decide to start building my dream room?
Can I just say after years of stumbling on bad advice, services and installations (even from professional companys) your teachings are like sweet honey to my audio geek soul..
Keep up the great work and I cant wait to get a room to start measurement!

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Thu, 06 Aug 2020 03:01:17 -0700
petercw2 on Mixed Use Room question https://www.acousticfields.com/acoustics-forum/dedicated-listening-rooms/mixed-use-room-question/#p1109 Dedicated Listening Rooms https://www.acousticfields.com/acoustics-forum/dedicated-listening-rooms/mixed-use-room-question/#p1109 My 2ch system shares a room w/ a totally separate Atmos system. I've been wanting to address the wall behind my 2ch speakers (which sit 60" into the room) and have wondered if a curtain I could pull across the screen during 2ch listening would benefit the system enough to justify the effort. The screen is what prevents me from being able to place a diffuser
on that wall, and I've yet to apply any other acoustic treatments in the room. (room is 17.5D x 11.5W x 9H)

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Mon, 03 Aug 2020 07:09:16 -0700
henriliiv on Subwoofer in a low-medium/small home studio https://www.acousticfields.com/acoustics-forum/acoustics-discussions/subwoofer-in-a-low-medium-small-home-studio/#p1108 Discussions https://www.acousticfields.com/acoustics-forum/acoustics-discussions/subwoofer-in-a-low-medium-small-home-studio/#p1108 Thanks for the input, Dennis! Now that I heard the more high-end options it makes perfect sense to me too. They sound good and even throughout the frequency range and it makes a lot of sense to put any extra money on treatment instead.

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Sat, 01 Aug 2020 00:03:25 -0700
acr on quadratic diffusers https://www.acousticfields.com/acoustics-forum/acoustic-treatment/quadratic-diffusers/#p1107 Acoustic Treatment https://www.acousticfields.com/acoustics-forum/acoustic-treatment/quadratic-diffusers/#p1107 Dennis,
I'm a new participant and have enjoyed looking at most of the videos
on the academy part of the video archive. I've learned a great deal and now have many good acoustical science explanations for many things I have noticed involving high end stereo play back in different treated and non-treated rooms. In one of the videos
you comment that you do not like using 3D quadratic diffusion in pretty much any application. I think the comment was something to the effect that 3D quadratic introduced confusion into the sound field compared with 2D which was why you always use 2D, although I may not have that quite correct. I may have missed something in another video on this subject and if so please direct me to which one.

My question is this. Is there any type of room or application where 3D quadratic diffusion, especially on a rear or front wall, would be better than 2D? I am thinking in particular of larger rooms used strictly for two channel play back. I am also wondering about their use with line source type speakers, either planar or otherwise, vs standard dynamic speakers. Maybe what I have heard with different rooms were issues with differences with more fundamental things other than the diffusion used and I wonder whether 3D diffusion used with line source speakers may defeat their very advantages by causing more negative effects from floor or ceiling reflections. I'm curious as to your thoughts on the subject

Sincerely,
Adam C. Reynolds. Boise ID.

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Fri, 31 Jul 2020 15:01:12 -0700
vladfisco on Do It Yourself Room Analysis https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/do-it-yourself-room-analysis/#p1106 Calculation and Analysis Tools https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/do-it-yourself-room-analysis/#p1106 Room size is:
Length: 17.06'
Width: 11.28'
Height: 8.46'

I have the Window on the back wall (in my back) = Length 6.39' x height 4.46'
Door (on the left wall, unfortunatly on the left of me kinda at the first reflection) = Length 6.56' x height 2.62'

Floor: lamiated parquet
Walls: poured concrete and is 0.5'
+ back wall (the one with the window) is 1.8'

Room usage: Video editing (audio also for advertising, documentaries etc), Recording 1-2 persons podcast and mixing that audio.
Speakers: 2 channels Tannoy Gold 8.
Microphone for voice recording: Shure SM7B

I would like also to soundproof a little bit for not getting sound out. Getting sound from "outside" the room, at the hours that I am working in, is not really an issue.

Room plan: https://ibb.co/vYP6wBZ

Any recommandation is welcomed.

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Wed, 29 Jul 2020 17:44:50 -0700
vladfisco on Do It Yourself Room Analysis https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/do-it-yourself-room-analysis/#p1105 Calculation and Analysis Tools https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/do-it-yourself-room-analysis/#p1105 Hi,

I've been sending the date for room analysis
but with no feedback for weeks. I send it again today.

I am sure you are very busy with everything, I can understand that. I am thinking of buying the DIY book and make the panels ourselves as we are in different countries (Europe) and shipment we think will be very very expensive...

I wonder if in the eBook are all the details for analysing the room so we know what to build and where to install it. Or how do we go about this analysis?

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Wed, 29 Jul 2020 17:10:54 -0700
vladfisco on Possible error in foot vs meter conversion for "Good Sound Room Volumes" Chart https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/possible-error-in-foot-vs-meter-conversion-for-good-sound-room-volumes-chart/#p1104 Calculation and Analysis Tools https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/possible-error-in-foot-vs-meter-conversion-for-good-sound-room-volumes-chart/#p1104 Looking over the optimal room sizes, I saw two images that you present (one with dimensions in inch and another one in metric system). Coming from Europe (where the metric system is used) I believe there is an error in your conversion from foot to meters.

9' is about 2.7432 meter, not 2.43 meter as presented in the image. And so on, all of the conversions are in error.

Am I missing something or is this an error?

Best regards, keep up the good work!

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Wed, 29 Jul 2020 17:06:22 -0700
Dennis Foley on Room mode: is it expected to have such a difference between dBA and dBC? https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/room-mode-is-it-expected-to-have-such-a-difference-between-dba-and-dbc/#p1103 Calculation and Analysis Tools https://www.acousticfields.com/acoustics-forum/calculation-and-analysis-tools/room-mode-is-it-expected-to-have-such-a-difference-between-dba-and-dbc/#p1103 S, The frequency response of the male voice starts at 90 Hz. You must choose room dimensions that will support that wavelength.

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Wed, 29 Jul 2020 14:05:18 -0700