Helmholtz Resonator, Need advice from some studio veterans |
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Jun 23 2013, 11:49 PM
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Never built one but I had a bookmark incase it was needed someday
 http://www.acousticmodelling.com/helmholtz.php |
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Jun 23 2013, 11:51 PM
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QUOTE (Darius Wave @ Jun 23 2013, 10:06 PM)  Hi guys. Currently fighting with my new room. Need a lot of improvements. I've got a question to some of You, who did built or just have an idea about the Helmholtz Resonators. Tell me how big resonator would You advice me for the 60 Hz resonance. I know it woulkd be good to have at least 50 x 50 x 100 cm but...I suppose it's also a matter of volume I usually work with and...it's not that loud. Maybe some smaller resonator will be enough for my home studio purpose? Question 2: Do I have to do a multiple wholes + tubes? Would be much easier to make precise freq adjustment by changing the length of only one tube....while...much harder with multiple. I'm just wondering about doing the DIY resonator - wooden box with only one tube going into.... Is this idea ok or this won't work fot shure? Might be easier to use compressed fiberglass but using thicker versions. Check this out by Ethan Winer: http://audioundone.com/do-it-yourself-bass-traps |
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Jun 24 2013, 12:10 AM
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Thanx guys! Some useful and clearly written stuff. I went through tons of information but need to confirm some of them
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I have no idea about the room but hanging monitors to walls (with a simple shelf angled-or something placed under monitors like glasswool) might also work facing you from a little above (tweeters can face upside-down for better sweetspot if needed), the 60hz area as far as I know usually generates behind the monitors but those diffusors will probably have to be really thick to handle that frequency.
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Jun 24 2013, 09:51 AM
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As above - bass trap set at an angle in the corner. A tuned trap like the Helmholtz isn't the best solution for a small room as you will be dealing with broadband bass issues. They're also difficult to make and are nearly always much, much larger then you think they'll be.
For a corner bass trap use high density rockwool - foam doesn't work - and layer it. Depending on your room you'll probably need it to be layered to 6'' or more deep. Floor to ceiling bass traps work better than short/mid length. Positioning your monitors so that they are correctly distanced from the rear and side walls and mounting them on rigid stands will also help. For a small room you usually need to add mid/high frequency adsorbers at the ideal 1/3rd listening distance and mirror points. -------------------- Get your music professionally mastered by anl AES registered Mastering Engineer. Contact me for Audio Mastering Services and Advice and visit our website www.miromastering.com
Be friends on facebook with us here. We use professional, mastering grade hardware in our mastering studo. Our hardware includes: Cranesong Avocet II Monitor Controller, Dangerous Music Liasion Insert Hardware Router, ATC SCM Pro Monitors, Lavry Black DA11, Prism Orpheus ADC/DAC, Gyratec Gyraf XIV Parallel Passive Mastering EQ, Great River MAQ 2NV Mastering EQ, Kush Clariphonic Parallel EQ Shelf, Maselec MLA-2 Mastering Compressor, API 2500 Mastering Compressor, Eventide Eclipse Reverb/Echo. |
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Jun 24 2013, 12:18 PM
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QUOTE (Darius Wave @ Jun 24 2013, 09:48 AM) Thank You for Your help...I think I'll experiment with the corner bass traps because they will also so be much less space-taking and the room is pretty small....3 x 3 x 2,5 m. As for the monitors placement...I'll experiment some more and do the meter the results but it's a bit of "practical aspects" limitations. See...there is a window just behind the monitors. I will glue something on it ...maybe a rockwool panels or something...here's my next question....what would You advice to cover the window? Some kind of Scheoeder difusor or some simple absorbing panel? P.S I'm using the foam only for some soft high end absorbtion ...like while recording the acoustic guitar etc...I don't expect it to "do the mirracles" ))Hi, I'd start with area the monitors are (behind ans sides) as I bet those windows are causing a lot of reflections besides added bass freq.s. Try finding hard but not very thick glass or rock wool, something like this; http://www.izocam.com.tr/tr-tr/urunler/yal...ger/izopan.aspx Notice its actually made to place behind radiators to keep the heat from absorbed by the wall. I bought a bunch of these for my ex-home studio, it works but don't expect miracles its very thin but very dense, you can cover it with cloth and keep in mind its better that the aluminum side facing you (absorbes little more bass freq.s). It should be a good solution for reflections too in such small space. Its hard to bend so probably you can mount them with minimum damage to the wall or windows.After than try build or buying a stand for monitors so you won't have reflections from desk. I'd place them high but directly facing me so not only they can be closer to the windows, reflections from desk would occur less. Also personally I like some distance from monitors. Something like this but with stands;  If you don't have good absorbtion I don't recommend deffusors specially in a small room. What will happen is most probably you'll end-up fixing one freq. and creating another problem freq. . But I do recommend diffusors for recording. Imagine a triangle of mic., guitar and diffusor. Placing a diffusor close to a guitar or mic. can have nice benefits and cool alteration on sound for recording. This post has been edited by Mertay: Jun 24 2013, 12:19 PM |
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Jun 28 2013, 01:50 PM
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Just a couple of things with the window. Sorry if I'm just repeating what's already been said...
The window will probably cause a variety of issues. You'll get broadband reflection and flutter echoes. The reflections will probably be particularly noticeable in the high frequencies. You also have sound proofing issues and you may find that there are some resonances from the glass and possibly the frame itself. What you actually get will depend on the construction of the window, the type of glass used and if its single or double glazed, etc. Without seeing it I think you'll need to put some absorption on the window Darius; even a heavy curtain woud help a lot. If you can try and position the monitors so that they don't fire back at the window. Also, if the window is parallel to the wall it faces then you should try to put some broadband absorption on the rear wall. -------------------- Get your music professionally mastered by anl AES registered Mastering Engineer. Contact me for Audio Mastering Services and Advice and visit our website www.miromastering.com
Be friends on facebook with us here. We use professional, mastering grade hardware in our mastering studo. Our hardware includes: Cranesong Avocet II Monitor Controller, Dangerous Music Liasion Insert Hardware Router, ATC SCM Pro Monitors, Lavry Black DA11, Prism Orpheus ADC/DAC, Gyratec Gyraf XIV Parallel Passive Mastering EQ, Great River MAQ 2NV Mastering EQ, Kush Clariphonic Parallel EQ Shelf, Maselec MLA-2 Mastering Compressor, API 2500 Mastering Compressor, Eventide Eclipse Reverb/Echo. |
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