Outstanding series! This completely satisfied my acoustics curiosities after soooo much voodoo and ambiguous answers surrounding this topic on other videos.
This was a great series thanks so much. I'm really impressed with how much you reduced the low end time decay since I thought low end was the hardest to control in small rooms. Some other commentors already mentioned this, but I'd love to see a video showing exactly how you built those bass traps and hybrid diffusors. Especially the traps, seems like they're highly effective. I have a vague idea from the diagram in the video, but the devils in the details. It would also be interesting to see your exact waterfall plot from REW in your room to see how even the peaks and nulls are in the low end with your killer treatment as sort of a gold standard for the rest of us to strive for. Anyways, thanks again this was awesome
There's been more questions lately about more detail on how I built the traps. I will start with building some membrane traps as part of solving the 88Hz null issue in my room. Stay tuned.
Awesome! Yeah...lots of "Juju" or "magic pixie dust" for a price out there. Better to understand your rooms...but don't let "perfect" stand in the way of "good for now." :D Thanks for the support and confirmation!
Hope you’re well, Thanks for your concise & informative explanation. May it be possible for you to share a more detailed description of your base traps i.e. materials, size & amount in room. Will be extensively appreciated.
@@mediaunion I cannot wait for it. I have watched hundreds of videos relating to acoustic treatments, REW, sound waves, etc... Your videos are awesome. Perfect blend of science, research, and DIY. Keep up the good work!
Hi Kevin Thanks for such a great step by step series on acoustics. Please give a link to the Corner Bass trap design from Sound on Sound Magazine that you referenced in the video.
@ASHISHSHARMA-hm6ex Thanks for following! Here are two links to assist you. Sound on sound: www.soundonsound.com/techniques/studio-sos-making-small-room-sound-good Hybrid Trap Diffusors: www.acousticalfulfillment.com/flex-48/
Great that you ask that...I recorded a lot of B roll building these but decided not to put together a video. Now I'll work on editing it all into two project videos. Stay tuned!
@@mediaunion perfect thanks man!! Loved the series, l’ve watched it a couple times to squeeze every bit of knowledge as you gave the best explanation I have seen on how to treat the room, use rew and the reasoning behind each step. I found your videos browsing for rew tutorials.
@@RaymanuelMuzik Another subscriber has asked about a tutorial on how to setup and calibrate REW so they can get after measuring their room. Would this help you with your projects? Let me know...
Hey Julen! I reversed engineered these from the brochure. Acoustic Fulfillment owns the patent for these designs. Check the company out here: www.acousticalfulfillment.com/flex-48/ Thanks for following!
Question please.... Does the MLV only hang from the top small piece of wood flopping all the way down to the bottom, or is it secured at the bottom as well ?. Thanks for sharing this awesome guide btw.
Great series, so enlightening! Is that rock wool? Could you tell me the specifications of it, please? I see you didn't close the back of the bass trap, so it seems it will work ok with it open. Is that gap between the front panel cover and the wool necessary? How much of a gap is needed? Thank you.
@CarlosPanades I used rockwool. What I did do to trap the fibers was to wrap the entire trap with "Upholstery Dust Cover Fabric" then place the MLV and the Absorber in front of the trap. I was experimenting if that distance made a difference but found that no great improvement resulted from distances from 1-3 inches. Thanks for the question.
@mediaunion Hi Kevin, You have produced an excellent video series presenting these difficult to understand topic's of small room acoustics. I have a question in regard to your choice of the mass loaded vinyl weight. I know they come in multiple size/weights, i.e. 0.5 pound to 2 pounds. Is the 1/8 in the best weight to target the bass frequency's? Is the 2 pound size so heavy that it has little to no effect? I know that the heavier weight is better for soundproofing but this is not our goal to barrier sound, but instead to tame the low end. Thank you again for sharing these excellent videos. I really like your method and approach to solving your rooms issues. I am also learning through your channel how to better use the tremendous REW . Thanks again.
@soundfx222 Thanks! Much appreciated. MLV has the following weight per sq. Ft. 1/2 lbs = 1/16” with STC of 20 3/4 lbs = 3/32" with STC of 22 1 lbs = 1/8" with STC of 26 1.5 lbs = 3/16" with STC of 29 2 lbs = 1/4" with STC of 32. I chose 1/8” or 1 lbs for my absorber/traps because many current commercial “Traps” and “GoBos” utilize that as part of their designs. The simplest explanation is MLV reduces energy of sound waves as they pass through it. Therefore the higher the weight/the better it dissipates energy. Check out some of the Trap/Absorbers from the big makers and see how they have incorporated MLV in their products. There are some that use MLV as the resonate panel in Helmholtz resonators. Check out this article: www.phelpsgaskets.com/blog/material-for-sound-proofing-and-sound-dampening for more detailed information on sound deadening materials. In my case, a 2x4 ft absorber with 1/8” MLV adds 8 lbs to hang on the wall. That’s not too bad but going up to 12 & 16 lbs can make your absorbers pretty heavy. It’s also important to keep your MLV flexible and pliant for taming the low frequencies we’re interested in. Any warm studio will help with that.
@@mediaunion Hi Kevin, Thank you for the detailed response on the MLV weight choice for your bass traps. I will choose the 1 Lb MLV as well given your logic concerning the weight of the absorber on the wall. As a follow up, did you get the MLV roll with fabric reinforcement on one side so the MLV would not tear when hung under its own weight? Are your bass traps using the MLV as a limp mass (free hanging) absorber material ( video on RU-vid from Sound on Sound: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-HdEYNdzi4kw.html or is it more like a diaphragmatic absorber which is tuning for one or two specific frequency(s)? I was planning on attaching the MLV only to the top of the frame like a tapestry (free hanging) and let it absorb and damp the room modes. I am ready to place my order and wanted to ask you these questions first to confirm by understanding and choices. Thank you.
@@soundfx2222 Sorry for the delay. Tapestry using 2 1/4" plywood pieces with MLV sandwiched between and screwed. For my absorber/traps they are cleated with 2 1/2" cleats on the sides but not on top or bottom. I used a piece of 1/4" plywood to sandwich the MLV to the cleats. Keep in touch!
Hi, great video and series! Did you build a air sealed enclosure to the corner or do you just have fabrics covering the mineral wool? Hard to see from video. Thanks!
Hello! The super chunk corner traps are a simple wood frame filled with mineral wool and covered with upholstery "utility" fabric also know as Cambric. I also use this fabric on the back of my absorbers to minimize fiberglass and mineral wool dust in the air. Thanks for asking!
@@mediaunion Thanks! That’s what I thought and probably will build something similar. Your design seems to be more broadband than a sealed membrane resonator. Probably more useful as it is not so sensitive to exact tuning.
@@anttiniku5223 My next video will explore building a sealed resonator that didn;t turn out as expected. I was attempting to trap bass while absorbing the mids/highs. Stay tuned to see what came from the effort!
This might be a long shot but would u mind sharing the spec of the mass loaded vinyl you used? Or where u bought it from? Fantastic results for the RT-60. Would love to see the final room frequency response!
@Hakim Lee I'm using 1/8" MLV which is about 1 lbs per square foot. I bought mine from acoustimac I think. It provides an overall STC Value of 27. Check out their test results here: www.acoustimac.com/media/TL16-377.pdf PS I'm working to finish a video I've been working on for back wall traps and will do a complete studio recap and walk through.
This series has been exceptionally helpful! You mentioned that you found your corner trap design plans through sound on sound. Would you be willing to share a blueprint or link?
Hi, very interesting video serie. Thanks a lot for your clear explanations! I have a dedicated basement for home cinema. My system is a 7.1 with 7 Behringer 2031p speakers and Klipsch r115sw subwoofer with also a Nad T758 v3i AVR. I have bought minidsp umik 1 microphone to measure RT60 with Rew, right now the average response is around 700ms. Im am thinking in build diy 1st reflection absorber panels, basstraps and diffuser panels. I have seen that you diy your basstraps, my question are, Which material did you use? Which could be a good density, abortion coefficient and thickness for basstraps and absorbers? Which are the easiest kind of diffusion panels to build diy? Thanks in advance Luis
Hello Luis! There is a great SOS forum for building corner traps and absorbers. You can find it here: www.soundonsound.com/forum/viewtopic.php?f=24&t=25530 For corner traps I went with 3.5" rockwool triangles and 1/8" Mass Loaded Vinyl, for the framed absorbers I used ridged 2" & 4" fiberglass. I think the easiest diffusors are the ones I built (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2r20LKQ49EQ.html). I've built skyline and RPG diffusors and they take up lots of space and time to build. Best, Kevin
Currently using Roxul in the corner "super Chunks", Membrane bass trapping, 2" OC 703 for the mid/hi-Mid/hi, 4" OC 703 for the clouds...Will post a video soon about what I've done thus far. Thanks!
@irascib1e good fundamental question. Acoustic science is frequency and time measurements. Early in the series I focused on Zone 1 & 2 and I'm measuring frequency to identify modes or resonant frequencies that I need to mitigate using trapping. These appear on the plot as peaks or nulls on the frequency plot and your ears hear them as boomy or thin low end issues. I should have showed a bit more on the frequency plotting. After sorting low/lowmid issues my attention turned to time (RT60/C80) where mid/hiMid frequencies are bouncing around the room. The use of RT60 helps identify frequencies that have too much energy and take a long time to decay. Your ears hear this as "blurry" or "non-directional" highs. Adding absorption and diffusion to the room reduces excess mid/hi frequency energy and time delays. I spent a good deal of time on absorption/diffusion to mangage RT60 because I feel it is overlooked in home studios and results in "dead" sounding rooms and mixes. PS I'm revisiting my low end trapping in the future because I still have an issue with couple of peaks between 120-150 hz . I hope to incorporate that into a future video on building my super chunk traps. Thanks for asking!
@@mediaunion makes sense thank you for the detailed response. I just got my first pair of nearfield monitors and this topic has been overwhelming but your videos helped. Question, do you see any hope for someone with a 10ft x 12ft x 8.33ft (ceiling) room? I worry the room is too cubic and there's no amount of treatment that will make it workable. I used the software in your video and it actually fell inside of the "Bolt" area (barely) but I worry the amount of treatment required for such a small room might be untenable. I also struggle with the ideal listening position
@@irascib1e Hey! I have lots of hope for you and this room. This is a journey not a sprint. *smile* I hope that you continue to experiment and learn about your room as you add traps, absorbers, and diffusors. Also failure is good as long as you learn from it. The worst case scenario is that you use good headphones as your final mix test for low end. Take your time and learn what works for you. "If it sounds good, it is good"
@@mediaunion Thank you! I am very excited to buy the parts from Home Depot to make some 2x4 panels. I don't mean to overwhelm you with info about my room but I found this waterfall graph fascinating, it looks like some frequencies don't decay at all! Here's the picture. Also do you have any idea what might be causing the large dip between 60-100Hz? imgur.com/a/GuLcynF Here's my room in your simulator: amcoustics.com/tools/amroc?l=12&w=10.16&h=8.33&ft=true&r60=0.6 It's ok if you don't have the time to look but since you're knowledge I thought I would try asking. Thanks again for your videos!
hello! Thank you for your work. I have looked for plans of the cylindrical diffuser that you have built but I did not find anything. Any information you can throw me to make them?
Hey i m in to new room the avilable space is A :: 15x21x10 WxLxH B::: 16x21x10 C:::: 17x21x10 Which one is good And there is no window etc only one door
Hello Robin. Yes. Often auditoriums are designed with some level of acoustic theory (even if it was built the early 1900s). If you are having services with maybe 2 lavs and a small worship band, I would recommend ringing out the system via 1/3 octave EQ then using REW to sweep the room in about 5 locations: Pulpit, Middle pews, Back pews, side pews, and corner pews. THen you can know what issues each area may be encountering. In Church, you will want to focus on C50 measurements (clarity of spoken word) My expectation is that you will probably look to simple absorbers along highly reflective walls to improve this without spending a ton of money. Start with the back of the auditorium and the stage area, then any parallel walls.
