Acoustic Panels – What & Where

Acoustic Panels – What & Where


Hi I’m John Calder of Acoustic Geometry
We talk with thousands of people about acoustic panels
and they all ask us “What?” and “Where?” So what are acoustic panels?
There are two types: Absorbers and Diffusors and they’re both important to improving the
sound of your room We’ll start by finding the first reflection
points which are simply the places sound bounces
after leaving your speakers on the way to your ears.
First reflection points have the first and worst effect
on sound in rooms. I’ll use my Nerf gun to find the first reflection
point on this wall. Of course, you may not want to find your first
reflection points like this.
So here’s an easier way. Get a handheld mirror
and an assistant. Slide the mirror along the wall until
your assistant sees the speaker’s tweeter. Mark that spot with painter’s tape.
Then repeat on the other side. Now you’ve marked your first reflection points
on the walls. Which panels go there?
Lots of people put absorber panels in their first reflection points, and that’s
ok. But a better option is to use our Medium Curve
Diffusors in those pesky first reflection points.
It’ll make your stereo sound stage wider and more
focused because our diffusors are phase-coherent. Flat surface reflections happen on all four
walls. So, let’s place one Small Curve Diffusor on
the back wall and one on the front wall.
We’ve mounted the front wall diffusor horizontally because sound moves in three dimensions
and it fits with the TV. Because corners make sound bounces worse,
we’ll use a Fabric Wrapped Absorber panel in each corner.
Two in front reduce side-to-side reflections and two in back reduce front-to-back reflections.
That’s it for the basics. These eight acoustic panels will definitely
improve the sound of your room and might be all you
need. All rooms are different.
And your room may need more sound control. So, let’s look at the next group of treatments.
The ceiling is a big, flat surface area and should be treated.
Ceiling absorber panels are called Clouds. Two are placed at the ceiling first reflection
points and two over your seating area.
Or you could use our Silk Metal absorber tiles if you
have a drop-in ceiling grid. These are cutting edge microperf technology.
We’re also adding a Fabric Wrapped Absorber panel in each corner.
Further reducing corner sound problems. And we’ll add one more Medium Curve Diffusor
on each side at right-angles to your seating position,
which is where the most annoying flutter echoes occur.
And that completes our first two groups of acoustic treatments.
There’s one more group of improvements, if needed.
Place a horizontally-mounted Small Curve Diffusor between each of the two sets of side wall
Medium Curves and place our Curve Corner Traps in
any two of your corners.
You can also add two to four more Clouds. As you can see, you don’t need to treat
every square foot to have great acoustics. Remember, your panels and layout will depend
on the size and shape of your room. As well as windows and doors.
Our terrific Acoustic Geometry dealers are always happy
to talk about our products with you. Call or click.
They’re listed on our website. Thanks for watching.

100 thoughts on “Acoustic Panels – What & Where

  1. Feel sorry for people who has small rooms & without acoustic panels. No need for me to get any as my room is Big enough Plus got material adsorbing the sound e.g Bed and what not

  2. I have massive bass build up in the front corners of room wich my speakers are at. The bass travels up 2 storeys and into my neighbours house, the bass notes barely come towards me. The shape of the room is rather ideal and open. But I can only place the 2 subwoofers in my corners, and yes I have gotten help with the settings of the audio. 
    I have just moved in, my sound system sounded alot better in my old place.

    So the question is, what kind of panels do I need?

  3. For crappy rooms, you really need thick bass traps in the corners with an air gap. Bass build up is worse than high frequency reflections

  4. I have a room with just a drumset in the basement and the sound is really bad … how do i make it sound better? When i play,it fells so loud and the sound is really bad.. could u help me?

  5. It's probably worth mentioning that some experimentation should be employed here. I understand this is meant as a brief overview but yeah. Getting a microphone specifically designed to analyze your rooms acoustic signature and some software to disiminate that information (Room EQ Wizard is a wonderful tool and it's free) will pay dividends when deciding on the placement of your panels and diffusers.

    If you're going to do it, do it right. I find it also helps, as a mixing engineer, to know exactly where in the frequency spectrum, the issues in your room lie. Helps to avoid certain mistakes when navigating a mix. For example, I know not to fret too much over a lack of bass in the 80-100hz range because I can see on my graph that my room has a reasonably deep null there.

  6. I gotta say, When watching this video, I felt like an Idiot.
    I was thinking to myself, "Ok, I get the idea of how this works, but HOW do I find the first reflection points?!"
    Then I see the guy with the mirror and Im like…. "Brain, you alive there?".

  7. I'm having problems with low frequency environmental noise – including tonal 17, 22, 60, 120 Hz and incoherent noise 0 – 20Hz. Is there a way to refit exterior of house to prevent the noise from causing structural vibration and wind turbine syndrome like effects (tinnitus chest pressure, nausea, tingling sensation in extremities) inside the house? I'm pretty sure the source is machinery at an MMAR grow op (probably heat pump or exhaust fans) … but haven't been able to figure out how to prove it.

  8. Hey John: What about if I have 4 in-cieling speakers? Will I need to install panels on ceiling still? Thanks, David

  9. If you want a better understanding of how sound waves behave then I suggest taking a trip down to the beach and study how sea waves behave when they hit an obstruction. A strong sea wave will reflect back off a flat sea wall but against other protruding obstructions the wave will often split into two or more waves, each new wave carrying less energy than the original. A sea wave hitting a group of rocks will be broken up into many more higher frequency but lower energy waves. Higher frequency (but lower energy) sea waves can even be absorbed by dense mats of sea weed. Sound absorbing materials (earthwool, foam, rubber etc.) are performing the same role on sound waves as the beach obstructions are performing on sea waves. Sound waves are of course travelling much faster than sea waves at about 340m per second. So a single sound source will be received by your ear many times in a room due to reflections until it is absorbed by materals in the room. As with sea waves, each reflection off a room obstruction will often split the originating wave into one or more new sound waves. The lower the frequency of the originating sound wave, the more reflections it takes before it is all absorbed (because more energy is stored in each lower frequency wave than a single higher frequency waves). Since they contain more energy in a single wave, lower frequency waves travel further, a characteristic that whales and elephants use in communication over long distances.

  10. Nice video. And I really enjoyed the "How Sound Works (in a room)" video too.

    But I don't understand why there is so much echo in the sound as captured by the camera even after room treatment here. Obviously, John Calder and the mic are not "ideally" placed relative to the panels. But at least, wouldn't all those diffusers and absorbers scattered in the room have reduced that effect ?

    As a last question, could someone elaborate a little why diffusers are/can be a better option than absorbers in the primary reflection point ? Is this only an advice for restitution environment, or this can be considered too in a recording or mixing room ?

  11. What about placing, say, carpet on every square foot of the room? Does that work in the same way or would acoustic panels work better?

  12. this video just eliminated my caring about acoustics. Sure it sounds great but you look like your trying to start a toddler tumbler club…

  13. All I want is to improve the sound quality of my listening/home-theater room without my wife asking for the divorce papers…There are so many different opinions, options, ideas and such that I'm going a bit crazy here…

  14. Planer speakers have more of a 'figure eight' sound dispersion pattern with the top and bottom of the ones firing straight – back and front. Do you plan to produce videos or other resources that show panel placement for these in addition to the box speakers you feature in current videos?

  15. Make sure u also watch the other video from the same maker, how sound works. It explains in a very simple way how sound works and why the sound is no good without some treatment.

  16. Even if they are trying to sell something, which is not a bad thing, this video does a great job explaining everything you really need to know in under 5 minutes. Good video.

  17. Wtf…I just have thick curtains on rails on my walls. When the move/music starts I pull them across the walls. When it's done they slide back to all 4 corners and are nicely tucked away.

  18. How about hard to hear (they're loud enough but not discernible at times) vocals – what is the most minimalist thing I can do to try and improve on vocals? Is there a common issue that I should investigate first? I have a decent set-up I think – Bowers and Wilkins in wall speakers, Rythmik subwoofer.

  19. I have an L shaped room on the main floor. The L is with the long part of the letter is facing East and the corner of the L, is facing west and the shorter end is facing North. If that makes any sense. The floor is wood, with some carpeting about 35% of the room. There is a chase in the corner of the L, and a small sofa along the west wall on the shorter end. There is a bay window which we had to insulate and bolt in moving blankets and hung moving blankets are hung over the window. This greatly cuts down the level going outside, but the problem sound is traveling out the front door. That is where it is the most audible from outside. I am thinking that the Auralex Sonalite panels should go in the corner where the drums are usually at. All of the absorbing material can be taken down. We plan on moving everything to the basement, but we have to wait for spring cleaning and some light remodeling first. I was thinking of spreading out the tiles 2 on the corner staggered and 2 by the front door, but I am not sure, if the absorbing material should be closer to the source?

  20. Wahh, your explanation of diffusers at the side wall is totally unlogical. First, you will cover only a small part of the emitted sound from the speaker , so treatment is incomplete. Sound is not a tiny beam but spread much wider. Secondly and worse: Parts of the sound are reflected though which should be avoided. This way you will have a kind of cut out of your reflections directly sent to the listener. Where is the use of that?

  21. The narration has a lot of lively room noise – I can hear the air conditioner 😐 . The noise gate is a bit severe too!

  22. Great, so acoustic panels can improve our basement studio but can it also work as sound-proofing? To not disturb our neighbors….

  23. "As you can see, you don't need to treat every square foot to have great acoustics"
    After suggesting you cover every square foot with their panels.

  24. I'm curious about large rooms like warehouses and sport arenas where the sound doesn't come from only one spot

  25. In other words, cover your entire fucking room with these expensive panels. How ridiculous would your room look if you actually followed this?

  26. if this channel didnt have a nerf gun i wldnt be interested. this applies to all math & related topics.

  27. I don’t think this would be possible unless I take out a few arcade cabinets and movie posters….that can’t happen.

  28. Not enough for the corners… you need a lot of mass to get any real difference for the corners.

    I get it, you're selling a product, but please… be honest!

  29. but then again; how do doors and windows afect the soundwave? do they simply reflect it but on a distorted way or a different speed? do they absorb? do they diffuse? If those points were adressed in the video, I might think for myself how many paneles I might need and where should I place them, but since they were not, I can't.
    Fuck this; I'll buy thick curtains…

  30. , I guess we all just need a round padded cell in our homes to listen to music.
    rubbish I say.
    people tend to over think and over complicate things way to much.
    all you need is carpet, a shit load of velvet Elvis Presly pictures on the walls and about half a million bucks for a McIntosh stereo system.
    right ?
    NO, wrong. bullshit.
    just go with it people unless you live in a solid concrete Yurt with no windows

  31. My house is 150 years old with floor boards that if stepped on in the right spot, at the right time, after you had a shitty day at work, will send what, on my end at least, sounds like I just dropped a bowling ball. The walls are also paper-thin and may not be familiar with insulation. All I'm trying to do is muffle the some bass from my TV and computer speakers, foot steps, and the opening and closing of drawer, making it as inaudible as possible from my parents room on the other side of a wall which is, when said activities take place, 6-18 ft away. I'd like to bless my parents with the illusion that I've moved out. Will these do the trick? (The asshole floor board is at a precise spot in my room and to be avoided, casual stepping only emits a minor vibration)

  32. Just moved into acoustic hell home. My new living room is about 2500sqft, with 30ft ceilings and a staircase to upper floor which opens another 1000sqft open area + 30ft wide balcony looking downstairs, all tile floor except upstairs. Also, I don't want to freeze at single spot, I like to walk around. It echoes like in cathedral, I even cannot understand others speech in here, music sounds rubbish of course. I have 200W stereo hi-fi which is useless now. Do you suggest to hire professional or sell this house? May be I just could cover each sqft with absorbers? Can we assume that covering every single sqft cannot go wrong?

  33. Who has a living room like that? With all that space? All those panels would overlap. Id be in a sound chamber. Id really like to see someone make some more decorative pieces. Maybe geometric shapes that you could place in different patterns? I wouldnt want my room to look like a blank art gallery. he he

  34. Thank you for the video. I have a question: Shouldn't you cover every single wall entirely? or just making a few frames, is enough to absorb any unwanted reverb?

  35. Phase coherence huh.
    I'm not convinced that's a real thing.
    When pertaining to these panels.
    It must be only at small time scales and not for long , before drift occurs and causes fade.
    Even if that's true, how much benefit could that be at such small scales?

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