1.     Don't be a dotard!
    Read these "rules" AND introduce
    yourself     before your first post
  2. A healthy approach to understanding measurements
    Being true to what the artists intended
  3. After being asked for the 308th time, Merv lists top 5 headphones
    (opinion / entertainment piece)
    Dismiss Notice
  4. $1000 to the first to design a headamp using discrete components with better measurements than Magni 3+
    Dismiss Notice
IMPORTANT: New Members Read This Don't Be a Measurement Fascist Merv's Top 5 Headphones - 2023 Edition $1000 Challenge

Measurement Changelog

Discussion in 'Measurement Setups, Systems, and Standards' started by purr1n, Nov 25, 2015.

  1. purr1n

    purr1n Desire for betterer is endless.

    Staff Member Pyrate BWC
    Joined:
    Sep 24, 2015
    Likes Received:
    90,076
    Trophy Points:
    113
    Location:
    Padre Island CC TX
    11/25/2015

    Added percentage distortion plots to all headphones I've measured on V2 system. Harmonic distortions in percentage makes it easier to compare distortion across the board.

    11/21/2015

    FYI, I've revised the CSD visualizations slightly. Going back to the old Changstar presentation that I used years ago with some tweaks. Here are the changes:
    1. The max time has been reduced from 5ms to 3ms
    2. Floor lowered to -36db from -32db
    3. Incorporated a normalization process to account for peaks and overall volume of the frequency response to set the appropriate level from t=0.
    The CSD plots will look much less forgiving. I feel this is warranted because many of the CSD plots since V2 seemed too clean. Note that Ultrabike's max time is 2.5ms.
     
    purr1n, Nov 25, 2015
    #1
  2. T.Rainman

    T.Rainman Acquaintance

    Joined:
    Oct 12, 2015
    Likes Received:
    57
    Trophy Points:
    18
    Your latest CSD's have a noise floor of -54dB while the post above says new measurements would go to -32dB (instead of -36dB) ?
     
    T.Rainman, Nov 25, 2015
    #2
  3. purr1n

    purr1n Desire for betterer is endless.

    Staff Member Pyrate BWC
    Joined:
    Sep 24, 2015
    Likes Received:
    90,076
    Trophy Points:
    113
    Location:
    Padre Island CC TX
    Hopefully not on the the official measurements in the first post or two of each headphone thread. The -54db floor ones as far as I know were only recently produced and were for separate deeeper comparative analysis specific to the TH-X00 discussions. If I did produce any -54db floor measurements in basic measurement set of a headphone, please let me know immediately. That should not be.

    Also the post says I will make the new floor -36db, not -32db was they previously were with the ARTA presentations.
     
    Last edited: Nov 25, 2015
    purr1n, Nov 25, 2015
    #3
  4. Ash1412

    Ash1412 Friend

    Pyrate
    Joined:
    Sep 27, 2015
    Likes Received:
    667
    Trophy Points:
    93
    Was -36db chosen as the floor because it was a threshold of audibility or was it simply an arbitrary number?
     
    Ash1412, Nov 26, 2015
    #4
  5. purr1n

    purr1n Desire for betterer is endless.

    Staff Member Pyrate BWC
    Joined:
    Sep 24, 2015
    Likes Received:
    90,076
    Trophy Points:
    113
    Location:
    Padre Island CC TX
    Pretty much, according to what I could hear and also by request by some members who preferred the early Changstar CSD presentations.
     
    purr1n, Nov 26, 2015
    #5
  6. ultrabike

    ultrabike Measurbator - Admin

    Staff Member Pyrate MZR
    Joined:
    Sep 25, 2015
    Likes Received:
    8,960
    Trophy Points:
    113
    Location:
    Irvine CA
    I'll change back to 3 ms going forward.
     
    ultrabike, Nov 30, 2015
    #6

Share This Page