Announcement

Collapse
No announcement yet.

Flat Response

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Flat Response

    I would like your opinions on actual vs. perceived flat frequency response. Some say a flat response sounds to forward or even harsh when auditioned in typical listening rooms,
    yet it seems a flat response is an important design goal for many designers.

    Do you like or dislike the way speakers with measured flat response sound and why? People who have actually listened to measured flat speakers can add worthwhile insight into this. I?m certain some speakers sound nice with a flat response while others do not. Let?s examine the causes for this. I believe we can gain valuable incites into speaker design that?s not possible just studying books and learning theory. It has been said Experience is the greatest teacher.

    I would like to keep this informal and friendly if possible. Anyone who wishes to participate is welcome and encouraged to voice their opinions. I don?t expect to solve this debate here. I think it will be interesting to hear everyone?s views. Disagreements are good, and I?m confident everyone will be courteous and respectful.
    ________
    LAMBORGHINI BRAVO
    Last edited by dano; 04-28-2011, 06:56 PM.

  • #2
    Re: Flat Responce

    A flat on axis response in a room may result in a non-flat response at the listening position when all reflections are factored in. Flat power response along with a flat on axis response is preferred for that reason.

    A well treated room is as important as a good system.
    R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
    Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

    95% of Climate Models Agree: The Observations Must be Wrong
    "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

    Comment


    • #3
      Re: Flat Responce

      He got everything right. Forgetting about your room is a bad, bad thing.

      FR at both the assumed listening position, and the power response (off-axis) must be accounted for. A 'bright' sound is almost certainly a lot of upper-midrange reflection (in a well-designed system.)
      I am trolling you.

      Comment


      • #4

        Comment


        • #5
          Re: Flat Response

          Consider what flat anechoic response means -- that the speaker is accurately reproducing the spectral content of the source at the measurement angle. Axially, Job #1 by most metrics, but not the entirety of it by any means or measure, and also not to be confused with in-room response....

          Comment


          • #6
            Re: Flat Responce

            3Khz? The human voice is fundamentally from about 80Hz-800Hz .. I don't believe this business about 1-3Khz. Listen to a sine wave at those frequencies and tell me you've heard someone speak that high :eek: ... The harmonics in my voice probably don't get above 320Hz, besides things like glottal noises and fricatives.

            Vocal intelligibility is based - at least in english - in vowels; a dipthong, for instance, is not going to include high harmonics like the "ess" or "t" noise, which are the things that get amplified in the 1-3Khz range.
            I am trolling you.

            Comment


            • #7
              Re: Flat Responce

              Originally posted by dano View Post
              I believe we can gain valuable incites
              I'm with you on this


              A well treated room is as important as a good system.
              ...and I would say, a good system importantly needs no room "treatment".
              (Or as Sean Olive might say, why waste heat in these energy conscious times?)

              cheers,

              AJ

              Comment


              • #8
                Re: Flat Responce

                Originally posted by MSaturn View Post
                3Khz? The human voice is fundamentally from about 80Hz-800Hz .. I don't believe this business about 1-3Khz. Listen to a sine wave at those frequencies and tell me you've heard someone speak that high :eek: ... The harmonics in my voice probably don't get above 320Hz, besides things like glottal noises and fricatives.

                Vocal intelligibility is based - at least in english - in vowels; a dipthong, for instance, is not going to include high harmonics like the "ess" or "t" noise, which are the things that get amplified in the 1-3Khz range.
                Well, then you haven't been listening to vocals while watching a spectrum analyzer.

                I have, and the harmonics reach well past 1KHz. And some female vocals have fundamental notes over 800Hz, with the obvious harmonics above that.
                R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                95% of Climate Models Agree: The Observations Must be Wrong
                "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                Comment


                • #9
                  Re: Flat Responce

                  Originally posted by ajinfla View Post
                  ...and I would say, a good system importantly needs no room "treatment".
                  (Or as Sean Olive might say, why waste heat in these energy conscious times?)

                  cheers,

                  AJ
                  I wonder how a system would sound in a tiled bathroom?
                  R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                  Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                  95% of Climate Models Agree: The Observations Must be Wrong
                  "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                  Comment


                  • #10
                    Re: Flat Responce

                    Perhaps I'd expand it to 1Khz. That's about the 'soprano C'. Keep in mind .. well, I'll say everyone speaks lower than they sing (tessitura-wise.) When we're talking about speaking intelligibility, I'm sticking with definitely below 1Khz. C7 is a silly-*** note, and doesn't happen very often at all.

                    Extraordinary examples (women like Mariah Carey, for instance, who can get up to 3Khz, even if that's basically a whistle and not a voice fundamental ..) are excluded here. In that case, I'd have to say the voice gets to 10Hz, too - looking for backup on that, apparently you can get to sub-1Hz. beee-essss
                    I am trolling you.

                    Comment


                    • #11
                      Re: Flat Responce

                      I wonder how a system would sound in a tiled bathroom?
                      Reductio ad absurdum this early?
                      C'mon Pete, let's let it play out a little longer before pulling that card eh?

                      So how did your system sound in the bathroom?
                      Did you listen to it in the refrigerator also? ;)

                      p.s. Remember, this is another "A" flat response thread

                      Comment


                      • #12
                        Re: Flat Responce

                        Well, AJ has a point - reducing, as much as possible, interactions with frequency modes in a theoretical room is a desirable. I also agree that a system is best-designed when it could work in more than one space without a bunch of hassle.

                        Dipoles, of course, help greatly in this regard
                        I am trolling you.

                        Comment


                        • #13
                          Re: Flat Responce

                          MSaturn, check this out: http://hyperphysics.phy-astr.gsu.edu...sic/vowel.html
                          and here: http://hyperphysics.phy-astr.gsu.edu.../vowel.html#c3

                          Not necessarily fundamentals. Oh man, a lot of posting since I looked for these links.

                          Dan
                          "guitar polygamy is a satisfying and socially acceptable alternative lifestyle."~Tony Woolley
                          http://dtmblabber.blogspot.com/
                          http://soundcloud.com/dantheman-10

                          Comment


                          • #14
                            Re: Flat Responce

                            I wonder how a system would sound in a tiled bathroom?
                            Like Villchur and Allison wanted.... ;)

                            http://www.classicspeakerpages.net/l...d_in_home_lis/

                            Comment


                            • #15
                              Go

                              Thanks everyone. This is better than I hoped.Don't stop.
                              ________
                              SEXUAL HEALTH FORUMS
                              Last edited by dano; 04-28-2011, 06:56 PM.

                              Comment

                              Working...
                              X