Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

A convolution based alternative to electrical loudspeaker correction networks
A convolution based alternative to electrical loudspeaker correction networks
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th December 2017, 10:34 PM   #581
BYRTT is offline BYRTT  Denmark
diyAudio Member
 
Join Date: Dec 2009
A convolution based alternative to electrical loudspeaker correction networks
Quote:
Originally Posted by gmad View Post
The rabbit was fed a steady diet of Apple earbuds after that ...
...

Quote:
Originally Posted by gmad View Post
...Thanks for sharing those curves. The attached graph is the JBL curve vs. my 2 ch avg room response with my psycho filter and the Katz 1kHz "knee" (1/24 oct fdw + psychoacoustic smoothing used for graph)...
Looks great and beautiful documented .

Quote:
Originally Posted by gmad View Post
...Nice work on that headphone response. That's something I'd like to try as well with my HD580s. My understanding at this point is that the curve with the ~2.7kHz peak is more for earphones while a flatter response is more appropriate for headphones. Let me know if you have any thoughts about that.
My thoughts on that is really hope not have used it wrong way on innerfidelity.com under resources there is a part one and part two explanation touching HARMAN research curve, direct link is here Headphone Measurements Explained - Frequency Response Part One | InnerFidelity and here Headphone Measurements Explained - Frequency Response Part Two | InnerFidelity.

Also under resources you can find a measurement named "HD 580 (HD600 headband)" that you could try out how it sounds transfer it to HARMAN curve, on paper HD580 looks a lot like HD650 except above 10 kHz. Method myself used was in pdf document viewer maximize the top left plot to fill hole screen to capture it into MS paint where a new other colour trace than grey was drawn as average of the multiples of raw data (grey traces), thereafter used FPGraphTracer : fprawn labs to get cans average curve traced.

If you look at miniDSP site they announce a new unit to measure cans so maybe we in future can do it better and not just make predicted correction but a documented one.
  Reply With Quote
Old 18th December 2017, 04:53 PM   #582
gmad is offline gmad  United States
diyAudio Member
 
gmad's Avatar
 
Join Date: Apr 2011
Location: Long Island, NY
Thanks again, BYRTT. That's a lot of new info for me; I'll be looking into it when I'm ready.


Virtual demo folder now contains an uncorrected room sample as a secondary reference (response shown in attached graph). The speaker's quasi anechoic freefield response is -6dB@80Hz (Qtc: 0.5) with a 1dB/decade "tilt". Even with a "nearfield" position, you can see the drastic effect the room acoustics have on the response. Although probably hard to believe after listening to the virtual demo, it actually sounds pretty good in reality and I have enjoyed it this way for many weeks. What I'm trying to show with this demo is how effective this automated correction method is despite its fairly low resolution (1-4 cycles) and very limited dip correction. The benefit of this should be less chance of response issues outside of the sweetspot even with single point measurements, along with possibly reduced cone excursion/increased efficiency of amplifier power.
Attached Images
File Type: jpg NoRoomCorrection.jpg (87.3 KB, 23 views)
  Reply With Quote

Reply


A convolution based alternative to electrical loudspeaker correction networksHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
STAHL - 'Acebass' Synthesis of Loudspeaker Mechanical Parameters by Electrical Means mike.e Subwoofers 51 11th June 2013 07:33 AM
Loudspeaker electrical damping zebra100 Multi-Way 1 7th July 2009 10:48 PM
Alternative offset correction for Alephs. Netlist Pass Labs 4 28th September 2005 08:39 AM


New To Site? Need Help?

All times are GMT. The time now is 01:54 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki