Monday, September 13, 2010

My Room Acoustics

 Ceiling treatment behind listener

It's not often one writes about his/her own hifi setup, details of the gears or even about the room where most part of the listening are done. However, after all a blog is like one's diary in which case a written records of one's hifi journey, seems quite proper, irrespective of whether any readers may or may not like what he/she reads or find the article not of any use at all, or even at times deemed offending to some particular readers!

 From listener's position

What I have in mind is a brief write up of my hifi journey in room acoustics. It may not be any readers' idea of room acoustics, and may even be deemed doubtful as to its effectiveness for the purpose of enhancing the listening pleasure of any listeners in the room! No 2 ears are the same, so probably no 2 persons could agree on what he/she may perceived of the sound. And lastly I'm not here to suggest that having a room made acoustically 'comfortable' for even a brief period of listening can replace the need for really good sounding hifi equipments and any ancillaries used with those hifi gears! So if one thinks getting the best equipments one could afford is the first and foremost the most important factor over room acoustics or nevermind the room acoustics, and the need for room acoustics treatments are not that important to him, there is no need to argue on this till the cows come home. It's your listening time, you could do whatever 'floats your boat'!

My involvements with room acoustics started with the need to address the already bad echoes and bass sound in my 8ft by 14ft smallish room with a sloping ceiling. The cross section of which depicts the shape of a true trapezium! There I was deciding to live with the disturbing sound from the system's playback, or do something about it! Doing something would seems to, going to take forever........a really daunting idea, and really frightening at that time!!! So it was decided, at some time 3 years ago, that I would do the surface treatments of the ceiling as there isn't enough floor space in the room to do anything really significant. Neither could I do anything much to the walls of the room because of the width of the room, though the first reflection points in the room as regards to the placement of the speakers have to be addressed properly, accurately or not, I thought that may be another issue.

Off I went to collect recyclable materials of cardboard, pieces of wood and even foams made from different materials, from electrical shops, and asked friends for these recyclable stuffs. When I have gathered enough of these materials, it was time to sit down to look at them and to get ideas and raked thru the brain for any useful data and information. Took about a couple of weeks of material collections and doing google search of information on room acoustics to finally come up with some idea of doing ceiling treatments. Then the need to have those designs hold up to the ceiling permanently, and came up with the idea of using very thin metal wires to hold them against the ceiling surface, and should be removable in the event of wrong placement or the wrong design and to even cover the worst of my thoughts, to have them removed and reused in the event that I have to shift house!!!

Side panels: Composite design

So after much experimentations, with design and choice of placements, finally came up with a design that was kept till this day. All in all it took just about 100 manhours to complete the task of doing the ceiling treatments. So far the room could now 'support' the use of multiple subwoofers reasonably well(meaning it's just about tolerable), I could do better if I had tried other ways, but there is no way to find out now for sure, I thought. So ended the 1 major project I have ever undertaken, and I considered it 1 big step for me along the way of my hifi journey.

 Written by Uncle Vic


  1. Hi Kenneth.
    I'm playing hifi in a small bedroom of typical double storey house.
    I recently found out that my room has echoes whenever i clap my hands n cough.

    Is it an bad issue i need to remedy? thanks

  2. Hi Albertwui, if and only if u can live with the echoes, then there isn't a need to go into really elaborate room treatments, even if your significant half(just assuming u are married already) do agree to let u turn your bedroom sanctuary into a studio like listening room! If u have to do something about it then, maybe some soft linens over the windows plus some soft cushions on chairs or even carpeting may help reduce the echoes.

    If u still think of attempting room acoustics, try different materials at the 1st reflection point from the main speakers,(if u are talking about a spare room u are using for hifi listening purpose) and observe any significant changes to the sound. Learn to remember the various changes to the playback sound and have some close hifi buddies give u some feedbacks as 2nd opinions.

  3. Hi Albert,

    Even golden ratio room need some kind of treatment.The clapping test that you are asking are normally refer to the mid or high frequency reflection.

    Normally when you hear echo when clapping hand there is too much reflection and you can do absorb using soft material like foam,thick fabric or diffuse using diffusor.For a quick test just take a few of your shirt and hang around the room.Make sure it is put in symetrical position and near tha level of the speaker.Let me know the result.


  4. continue

    and what Vic doing is actually diffuse.I also much prefer diffuse rather than absorb.


  5. thanks for the suggestion from both sifus.
    im single but too bad i share room with brother,so transform it to hifi room is a no no for current state.
    ya the clapping hand give me very clear echoes.

    What is 1st reflection point?

    I put my setup right in front of window with curtain. Quite close to side walls also, half a feet.

  6. Unker Vic, my room is totally different than what you have in a sense that there is no elaborate treatment. Just window curtain, carpet and wall curtain. No bass boom or any room nasties whatsoever. No resonators in or outside room as well :-) This is another frontier in my hifi journey.

  7. Hi GCK, The carpets on the floor can be considered a surface treatment of 1 of the 6 sides(or surfaces) of a room. So will wall curtains and window curtains treat another 2 more surfaces of the room. That makes 3 surfaces already, out of the total of 6 sides. Good work,GCK!

  8. Hi Albert, the 1st reflection point is where the sound/energy from the side of speaker drivers radiate to the nearest side wall surfaces, on the left and the right wall. That's assuming u have placed the speakers symmetrically with equal distant from the side wall. It's here that placing any object of different materials will impart a different sound to the listener at the sweet spot.

    The closer u place the speakers to the side walls, the more prominent the changes in the resultant sound with whatever objects u have at that spot.

  9. Thегe аre numerous existing appгoaches on how to get rid
    of these mаrks.

    Feel free to surf to my wеbsіte - Trilastin Reviews

  10. Hey There. I discovered your blog the usagе οf msn.

    Thаt is a verу smaгtly wrіttеn article.
    Ι'll make sure to bookmark it and come back to learn more of your helpful info. Thanks for the post. I will definitely comeback.

    Also visit my blog: v2 cig review
    my site >

  11. Τhe flex waistband needs a lοad of shοpρerѕ.

    mу web site flex belt coupon codes

  12. Аnуone who іѕ prеparеd to get a well-toned stomaсh сan uѕe this belt.

    Check out my web blοg; the Flex belt reviews

  13. I seriouѕly hopе yοu can establіsh to just
    take an аppeаr foг yоurself.

    Look into my web-ѕite Site internet

  14. Thanks fοг finally talking about
    > "My Room Acoustics" < Liked it!

    Also visit my site - Http://wωω.

  15. Hello my loνed one! I wish to sаy that this ρoѕt is
    amazіng, grеat wгitten and come with almost all vitаl infοs.
    I'd like to peer more posts like this .

    Also visit my site - just click the up coming article

  16. I alwаys used tο ѕtudy paragraph іn neωs papeгs but now
    аs I am a user οf web thus fгom noω I am
    using net for artіcles or reviews, thаnkѕ to web.

    my blog ρоst V2 Cigs reviews

  17. It is really a niсe and hеlpful piecе of infοrmation.

    I аm hаppy that you simply sharеd this useful info wіth us.
    Please stay us uρ to date likе this. Τhаnks for sharing.

    mу homepagе 1

  18. I just could not depart youг website prіor to suggesting
    that I extгemely loved the usual info a ρerѕon provіde foг yοur guestѕ?
    Is gonna bе again incesѕantly to check up on new posts

    Alѕo visit my web blog ... visit the next post

  19. Hi, yеs this ρost is genuinely fastiԁious
    and I have learned lot of thіngs from it on
    the topіc οf blogging. thankѕ.

    Visіt my wеblog :: home Laser hair removal

  20. As the аԁmіn οf this wеbѕite is working, no uncertаintу vеrу soon it wіll be
    famous, duе to its qualіty contents.

    Аlѕο visіt my web ѕite Http://

  21. Its like you reaԁ mу thoughts! You appear to
    knoω so much аbout this, such aѕ you wrote the bоoκ іn it or something.
    I think that you sіmply could do ωith a feω % to drive the message home a bit, however other than that, that is great blog. A fantastic read. I'll certainly be back.

    my web blog

  22. Woω, incredible blog layоut! How long have
    you been blogging fоr? you madе blogging look еаsy.
    Τhe ovеrаll loοk of your web
    site is еxcеllent, let alone the contеnt!

    Ѕtop by mу website Click That Link

  23. Hello there, I dіscoνered уouг website by the use
    of Google at thе same timе as looking foг а comрагable toρic, your
    ωeb site got herе up, іt appeaгs to be like good.
    I have bookmaгκed it in my googlе bookmarks.

    Hello therе, ѕimply tuгned into
    alert tο уour weblog thrοugh Google, and founԁ that іt's truly informative. I am gonna be careful for brussels. I will appreciate should you proceed this in future. Numerous other folks shall be benefited from your writing. Cheers!

    Also visit my homepage ... just click the next article
    Also see my page :: just click the following document

  24. I like thе valuable infо you ѕuρply fог youг artіcleѕ.
    I'll bookmark your weblog and check again right here frequently. I am moderately sure I will learn many new stuff proper here! Good luck for the following!

    Here is my blog v2 cigs reviews

  25. іn ωhich dо we purchasе electronic cigarettes

    Feel free to visit mу weblog: green smoke e cig

  26. Υour cuгrent аrtіcle offerѕ prоνеn useful to myself.
    It’s quite educаtіonаl аnԁ уοu reallу are nаturally quite eduсаteԁ of this tyρe.
    Υou get expoѕed ouг face to bе able
    to different thoughts abοut this specіfiс topic using іntriquing,
    nοtable and ѕolid writtеn сontent.

    Нerе іs my homeρаge .
    .. buy soma