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rt60
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  1. REW Forum
    Dear All, I am using REW 5.1 on Mac El Capitan with a Scarlett 2nd gen 2i4 sound card and a Dayton Mic, both of them with a cal file. I am measuring RT60 on an empty room that is about 58K2 cubic feet. ( 1650 m3 ). I used two speakers and one sub to generate the sweep. I tried sweep ranges from...
  2. REW Forum
    Hi Forum, love REW, and read a lot here in the forum. I have some questions and it would be nice to get a little help and support from you. Thank you. 1)Is there a way to get a more static reading of REW RT60 graph? Everytime i measure it is really fluctuating a lot. If i measure 4 times at...
  3. REW Forum
    Hello I use REW for teaching and this issue constantly arises. When analysing the RT60 of an impulse response a certain frequency range will show zero reverb time (see attachment). I am very familiar with REW and am quite sure I am doing everything correctly, though maybe not ;) Has anyone...
  4. Home Audio Acoustics
    Hi, I've finally achieved a satisfactory FR (thread here and here) with my mains + subwoofer; however, with concrete walls and wooden floors there is a lot of reverb and I'm thinking this is why the sound isn't *that* good at all... My first RT-60 is shown below, and I'm wondering, is this...
  5. REW Forum
    Hi All, Trying to figure out how my room measures. So I did the following Noise Floor - Position 1-3 Front Left only - Position 1-3 Front Right only - Position 1-3 Position 1 is MLP and 600mm right and left is P2 and P3 - based on facing the screen. Using REW 5.13 and a UMIK calibrated MIC...
  6. REW Forum
    I'm trying to decide which settings are most appropriate for evaluating RT60 in my listening room. From what I gather, Topt is the preferred metric, however I'm less clear on whether I ought to use reverse filtering and zero-phase filtering. The help box suggests that reverse filtering provides...
  7. REW Forum
    Fairly flat response of my stereo set-up (no sub). I see plenty of decay in the waterfall which says absorption needed. I have plenty of diffusion going on and very little room for absorption with my layout. What do you think?
  8. REW Forum
    I have a small village hall that sounds bad. I don't need the RT values to tell me that, most of the users complain about it. What I need to do is get some sort of value to quantify the problem. The hall is 15M by 10M by 6.5M at its ridge with hard walls, large windows and no soft interiors...
  9. REW Forum
    I've noticed that in all the measurements that I'm doing in my demo rooms and customers rooms as well, the RT60 value below 200 Hz start to increase esponentially and can reach a value of about 1.6/1.8 below 100 Hz and in one case even 3 from and below 80 Hz. What does this means and how to...
  10. REW Forum
    Hi, My name is Aimee. I am using REQ v. 4, Build 673. I would like to import my impulse responses and measure RT60 (reverb time). I have a few questions. It says online that I can use RoomEQ to read RT60, and REQ has a time vs DB graph in the Impulse section, so, I'm assuming it's giving me...
  11. REW Forum
    Hi all. I hope that I didn't use a bad thread for this - I have a minor problem with numeric data export. I am trying to export RT60 data as text, but the text delimiter options didn't work - exported text uses still just space regardless of the delimiter selected. I am using WinXP and REW...
  12. REW Forum
    Hello there. I am a newbie using REW program. If i were to measure acoustic properties of a dinning room full of echos. when just only a few people speak in the room. Echos don't stop as quickly as it should. There is no sound system in the room, just one TV. So far, REW must work with two...
  13. REW Forum
    does anybody know how to extend the rt60 time past 1500 ms
  14. REW Forum
    Hello, I mesured my system, and now I have a probelm with understanding the RT60 plot. For me there is no such Rt60 graph, only T30 and RT20 - so do I have to multiply them by 2 or in case of RT20 by 3 to get my RT60. Thats what is writen in my acustic book. But there must be a RT60 graph ...
  15. REW Forum
    Hello Folks, REW is an excellent tool, but - from my point of view - lacks of a tutorial that guides the average mid-level audiophile user. Personally I feel the need to have a quick guide/easy tutorial on Basic Room Anylize & Correction, where the complex aspects related to RT60 and Decay...
  16. REW Forum
    Do the graph in the RT-60 measurement of REW represent Sabine or Eyring? Thank You
  17. Home Audio Acoustics
    I reran REW in my room after some minor changes over the last few weeks. Suddenly I have an almost off the chart spike in RT60 at 10k+. Waterfall shows a weird decay. It seems linear, so I'm not thinking a buzz or other equipment problem. What could be causing this? I am using a beta...
  18. REW Forum
    Hello and Happy Holidays I am hoping someone might be able to tell me why my RT60 graph begins at 90hz? I am measuring full range from 20hz and the graph shows no bar for RT60 from 20hz to 90 hz? Could this be a hardware issue, perhaps? Thanks
  19. REW Forum
    Hi This is my first thread and post. I have a problem with exporting RT60 results as text. I've tried to export measurements as text, EQ settings as text and everthing works fine, but the result of exporting RT60 as text is empty text file. I use REW V5 on MAC Mini with WinXPSP3 & Bootcamp, but...
  20. Home Audio Acoustics
    So, after reading threads recommending .35 - .5 RT60 times, and coming up with .2s based on calculations (1400 cuft), I had a few minutes to play with ETF5 last night. I know that I need to adjust the levels, and do a sweep rather than white noise to get a more accurate measurement... but is...
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