deep absorption can make a wall acoustically transparent above the schroeder range. its not a myth.
I use 12 inch deep panels at the early reflection points
you know whats a myth? RT60 being a relevant data in small rooms.:
https://gearspace.com/board/showpost.php?p=13344287&postcount=39
https://repforums.prosoundweb.com/index.php/topic,29752.0.html
https://tech.ebu.ch/docs/tech/tech3276.pdf
12 inch deep panels ??
and at the reflection points.
hahaha
yeah whatever
nice
do you have real measurements of your room we can see?
legit question. Not being snarky.
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you and me both man.
just waiting for me to install the new external xo.
then I will put in the new tweeters
if there are any tweaks I need to do to the xo after I install the new tweeter, I want it to be external of course.
the truth is, it’s really hot here now and not so conducive to listening to music unfortunately A/C is on and that adds noise.
hey Tony
in the last week, ive posted measurements of my new speakers. some measurements are 1.5m away, some are from the listening position.
yep, it might appear absurd to use very thick early reflection panels. but its not. The early reflections points also acts as bass traps, so its a double whammy. acoustician recommend to do always do this, if possible. Of course, for most, its not possible since often their main system is in the living room; in that case, even 2'' thick panels at the various early reflection points will do wonders! But if you can and have the space, thicker the better!
is this the room you have the 12” panels in?
can you post measurements from your seating area?
waterall, freq ,spectrogram and RT60
Nick
can you post measurements from your seating area?
waterall, freq ,spectrogram and RT60
Nick
yes. the Bookshelf is gone since I had to make more room and the bookshelvef with the books really affected my response with these new speakers
look at my previous posts? from about a week ago ive shown some...I guess i could do decay measurement though! i have never tried, but hey i have all early refletion points treated (ceiling, behind the LP, the floor and side walls)
my room is irregular shape, its actually a horrible room ( in terms of bass modes). ive managed to do something half decent with it, but yeah, i wish i had a normal 4 wall room, but i dont.
nothing different about a decay measurement.
it’s the same measurement you do but allow REW Or whatever software you have calculate it into RT60 decay
you Only have bass mode issues with the speaker so close to a boundary?
I think that’s a bed the speaker is touching on the right of it
where do you fit a 12” bass trap in there?
i personally don’t know of anyone who sells 12” bass traps either
it’s the same measurement you do but allow REW Or whatever software you have calculate it into RT60 decay
you Only have bass mode issues with the speaker so close to a boundary?
I think that’s a bed the speaker is touching on the right of it
where do you fit a 12” bass trap in there?
i personally don’t know of anyone who sells 12” bass traps either
BTW.
i hope you were trying to mess with me , telling me to put 12” panels on the early reflection points.
if you didn’t. I don’t know man. Lol
The Schroeder is a freq not a ‘range’.
it differs a bit depending on each room.
its kinda the ‘ crossing point’ from where your room behaves like a resonator and above it , it behaves like a reflector and diffuser.
RT60 is useful even in smaller rooms. Of course you will be only paying attention to whatever is above 300hz or so.
Acoustic panels also reflect a lot of freq above 6kHz.
you should read Dr Floye Tooles book ‘ Sound Reproduction’.
it has some good stuff in there about acoustic treatments.
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ive literally never done burst decay measurements l;ol. only frequency response
in Arta, its not quite simple. ive just did for the first time. clearly the mid is a bit too hot imo. or maybe the measurements are really related to the height of the mic
I also just took the frequency response of the left speaker, mic at the listening position 7.5 feet away from the speaker.
interesting to note ive just installed the PHL mids. first time i take measurements of them from the listening position!
@AllenB
I just started on speakers, so of course I don’t know much about crossovers and speaker design.
not room acoustics. That’s pretty different.
some overlapping stuff , but still quite different.
for acoustics I spent over two years , reading, taking guidance from a pro and experimenting. So yeah I know a bit on acoustics.
but i haven’t done measurements in other rooms.
why is that strange to you?
it’s completely logical.
just because I don’t know about speakers doesn’t mean I know nothing about sound or acoustic treatment
or are you trying to tell me that a 12” panel is feasible and makes a wall disappear ?
i don’t know. That was a weird statement Allen.
i played violin , piano and guitar for over 35 years. Does that make me not know anything about music or sound because I don’t know about speaker design?
weird
I just started on speakers, so of course I don’t know much about crossovers and speaker design.
not room acoustics. That’s pretty different.
some overlapping stuff , but still quite different.
for acoustics I spent over two years , reading, taking guidance from a pro and experimenting. So yeah I know a bit on acoustics.
but i haven’t done measurements in other rooms.
why is that strange to you?
it’s completely logical.
just because I don’t know about speakers doesn’t mean I know nothing about sound or acoustic treatment
or are you trying to tell me that a 12” panel is feasible and makes a wall disappear ?
i don’t know. That was a weird statement Allen.
i played violin , piano and guitar for over 35 years. Does that make me not know anything about music or sound because I don’t know about speaker design?
weird
the 12'' thick 2x4 feet acoustic panels are located on the left and right side wall, horizontally. The panels are DIY made with Roxul construction foam. Very easy to make and literally what professional uses
It looks like you have reflections from 500hz to around 2khz.
you could take a sweep at your listening position and look at it as an impulse.
this will show you your first reflections and doing some math you can actually calculate how far away they are from the listening position and thus where they are coming from in the room.
i can show you how to do that if you want
you could take a sweep at your listening position and look at it as an impulse.
this will show you your first reflections and doing some math you can actually calculate how far away they are from the listening position and thus where they are coming from in the room.
i can show you how to do that if you want
lol
no i was not kidding!
you should read what ive posted. theres thread with many known acoustician literally discussing the lack of usefulness of RT60 measurements. you should go and debate this with them. i wont argue and take their professional opinion.
Ive read Tooles!
yeah i have no idea what the 500hz to 2khz mean. nor if i did a good impulse measurements. im sure i didnt actually as this was not even a sweep but a frequency response. Do you use Arta?
Here is a good example of when my room had no acoustic treatments and after.
The first pic is of course before I had acoustic treatment.
You can see from the pic that I had a very strong reflection with energy almsot high as the direct sound.
That was the rear wall since my sofa is pushed up against it.
the second one was a large coffee table I had in front of the sofa and the third is the ceiling.
i have my speakers on the long side of the room. So i hardly get any reflection from there. And what I do get from there contribute to a nice large soundstage. Floyd toole said that some reflections from the side walls are good for special width.
but it is room dependent of course.
the second pic of course shows how much the room improved greatly after two years of trial and error with acoustic treatment.
i could put something on the ceiling to get rid of that second reflection , but I don’t want to put anything on the ceiling. For aesthetic reasons. So the reflection stays.
lol
plus it’s a vertical reflection. So it doesn’t matter much at all.
The first pic is of course before I had acoustic treatment.
You can see from the pic that I had a very strong reflection with energy almsot high as the direct sound.
That was the rear wall since my sofa is pushed up against it.
the second one was a large coffee table I had in front of the sofa and the third is the ceiling.
i have my speakers on the long side of the room. So i hardly get any reflection from there. And what I do get from there contribute to a nice large soundstage. Floyd toole said that some reflections from the side walls are good for special width.
but it is room dependent of course.
the second pic of course shows how much the room improved greatly after two years of trial and error with acoustic treatment.
i could put something on the ceiling to get rid of that second reflection , but I don’t want to put anything on the ceiling. For aesthetic reasons. So the reflection stays.
lol
plus it’s a vertical reflection. So it doesn’t matter much at all.
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from the look of your room in that one pic , those freq could be the bed and part of the wall/acoustic panel next to it.
you would have to do an impulse sweep to see where the reflections are coming from.
i personally would raise the speakers in that room so they are at least over the bed and reduce that panel on the side in thickness. You have a very narrow room, so you don’t want to make it even smaller acoustically.
i assume you took a mirror and had someone put it on the side wall while you were in your listening spot to see where to put that panel?
and is that a nice kitty on the radiator?
No I use REW. It’s free! Lol