DAC suggestion - Page 8 - AVS Forum
Forum Jump: 
Reply
 
Thread Tools
post #211 of 214 Old 08-14-2012, 01:13 PM
AVS Special Member
 
mcnarus's Avatar
 
Join Date: Nov 2007
Posts: 6,009
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Liked: 265
Quote:
Originally Posted by arnyk View Post

One way to do blind testing with devices like this is to have a person who is hidden from all of the listeners.
Let him flip a coin in secret and make a numbered secret list of unknowns. Since there are more than 2 choices he should flip a number of coins, count heads as 0 and tails as 1 on the first coin he picks up after each toss, then heads as 2 and tails as 3 on the second coin he picks up, etc., and sum the value of the coins tossed for each unknown.
Then when the listeners call out a trial number, he consults the list and selects the filter associated with that number. They write down the filter number they think they are listening to and keep their results to themselves.
When all of the trials are complete, compare the secret operator's list with the listener's lists.
Score in accordance with this:
http://home.provide.net/~djcarlst/abx_bino.htm
I would not do the test this way. The task of identifying one of 8 filters is absurdly difficult. The risk of a false negative would be high. All we need to know is, can they distinguish between any two filters. You could pick two at random. Or you could let the subjects decide in advance which two filters are most distinguishable.

If you can't explain how it works, you can't say it doesn't.—The High-End Creed

mcnarus is offline  
Sponsored Links
Advertisement
 
post #212 of 214 Old 08-15-2012, 03:42 AM
AVS Addicted Member
 
arnyk's Avatar
 
Join Date: Oct 2002
Location: Grosse Pointe Woods, MI
Posts: 13,848
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 403 Post(s)
Liked: 1047
Quote:
Originally Posted by mcnarus View Post

I would not do the test this way. The task of identifying one of 8 filters is absurdly difficult. The risk of a false negative would be high. All we need to know is, can they distinguish between any two filters. You could pick two at random. Or you could let the subjects decide in advance which two filters are most distinguishable.

I totally agree with this. But I was under the impression that the people doing the test were shall we say very optimistic about their hearing abilities.
arnyk is online now  
post #213 of 214 Old 08-15-2012, 06:57 AM
AVS Special Member
 
mcnarus's Avatar
 
Join Date: Nov 2007
Posts: 6,009
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Liked: 265
Quote:
Originally Posted by arnyk View Post

I totally agree with this. But I was under the impression that the people doing the test were shall we say very optimistic about their hearing abilities.
Yeah, Arny's, but let's at least give 'em a fighting chance!

If you can't explain how it works, you can't say it doesn't.—The High-End Creed

mcnarus is offline  
post #214 of 214 Old 08-15-2012, 08:02 AM
AVS Addicted Member
 
arnyk's Avatar
 
Join Date: Oct 2002
Location: Grosse Pointe Woods, MI
Posts: 13,848
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 403 Post(s)
Liked: 1047
Quote:
Originally Posted by mcnarus View Post

Yeah, Arny's, but let's at least give 'em a fighting chance!

The bad news is that they don't have one and never will, no matter how they simplify the test.

There is only one way to "hear" differences among the settings of this product, and that is with a sighted or single-blind evaluation. ;-)
arnyk is online now  
Reply 2 Channel Audio

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off