Sound Quality Vs. Measurements - Page 242 - diyAudio
Go Back   Home > Forums > Member Areas > The Lounge

The Lounge A place to talk about almost anything but politics and religion.

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 15th February 2012, 08:37 PM   #2411
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
Originally Posted by sonidos View Post
Yeesh, that old NASA story has long legs on the internet. That story gets bigger and better all the time and is not entirely true.
Good instincts. Urban Legend.

snopes.com: NASA Space Pen
__________________
And while they may not be as strong as apes, don't lock eyes with 'em, don't do it. Puts 'em on edge. They might go into berzerker mode; come at you like a whirling dervish, all fists and elbows.
  Reply With Quote
Old 15th February 2012, 08:43 PM   #2412
dvv is offline dvv  Serbia
Sin Bin
 
Join Date: Sep 2004
Location: Belgrade, Serbia
Quote:
Originally Posted by ThorstenL View Post
Sy,



The reason that I am not interested in establishing audibility limits is that my research concerns other areas. It is strictly directed at practical applications and at preferences of experienced (and modestly well off) listeners, however, i would like solid evidence that the extra cost is justified.

My ideal outcome would in each and every case be that no differences exists and I can use the cheapest and simplest solution and increase the profit.Ciao T
Hah! You wish!

And to make it just that wee bit more complicated, long gone is the rule of thumb that if you pay more, you get more. These days, the only rule is that there is no rule, you have to test just about everything yourself, and not once, but every time you get a new batch.

I've seen some serious variances in batches from some supposedly big names. I've seen warranty periods of some big and expensive names go down from 2 years to 6 months. And I'm supposed to give my customer a 5 year warranty?
  Reply With Quote
Old 15th February 2012, 08:48 PM   #2413
diyAudio Member
 
Join Date: Feb 2009
Location: UK
Quote:
Originally Posted by ThorstenL View Post
There would be room to quibble. In some areas -110dB may be insufficient
This is where I can only but defer to the Golden Ears. If I put my ear right next to my speakers I can just about hear a hiss from the amplifier. It's certainly not audible to me more than a couple of inches away, even when not playing any audio - I imagine even Brownian motion of the air molecules probably swamps it after that. The idea that when playing music at any SPL, that level of underlying noise or distortion, even if completely non-harmonic, would be perceivable is, to me, incredible. And -110dB is much quieter than that!
  Reply With Quote
Old 15th February 2012, 08:49 PM   #2414
dvv is offline dvv  Serbia
Sin Bin
 
Join Date: Sep 2004
Location: Belgrade, Serbia
The POINT of that little tale is nicely expressed by the very first sentence right after the word: Origins.

Please take another look.
  Reply With Quote
Old 15th February 2012, 08:52 PM   #2415
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
Originally Posted by CopperTop View Post
The idea that when playing music at any SPL, that level of underlying noise or distortion, even if completely non-harmonic, would be perceivable is, to me, incredible. And -110dB is much quieter than that!
Bill Waslo's brilliant Sousa band demo is very enlightening in this regard.
__________________
And while they may not be as strong as apes, don't lock eyes with 'em, don't do it. Puts 'em on edge. They might go into berzerker mode; come at you like a whirling dervish, all fists and elbows.
  Reply With Quote
Old 15th February 2012, 08:53 PM   #2416
dvv is offline dvv  Serbia
Sin Bin
 
Join Date: Sep 2004
Location: Belgrade, Serbia
Anyone remember the movie "The Ghostbusters"? The scene in which Harold Ramis and Dan Aykroyd are sitting on the steps of the university they have just been fired from and are discussiong their options, when Harold says something like:

"Well, we could try the private sector",

and Dan Aykroyd quickly answers:

"Oh no, not them, they want RESULTS!"
  Reply With Quote
Old 15th February 2012, 10:02 PM   #2417
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by dvv View Post
All this reminds oh-so-STRONGLY of that old story:

When the first atronauts went to space, it was discovered that ball point pens will not operate at zero gravity. NASA immediately summoned all its staff on leave, cancelled some of its current projects and reallocated the resources, the current administration immediately passed a bill through congress and senate funding the project with $4 billion. 4 years later, they came out with a novel pen, costing $1,000 per unit, which works.

The Russians used a pencil.
One more similar story: during some international scientific conference they needed to calculate overnight percentage of land and ocean water on the Earth surface. Russian programmer printed globe strips on paper, took scissors, cut prints carefully, and weighted them. Soviet economy was very inertial: they could not give financing before planning. Plans were calculated for each 5 years, for the whole huge country, incuding education, resources, manufacturing, medicine, everything...
But they could give orders to do something "here and now", so engineers and scientists had to be creative in making results without resources.
__________________
The Devil is not so terrible as his math model is!
  Reply With Quote
Old 15th February 2012, 10:45 PM   #2418
a.wayne is offline a.wayne  United States
Sin Bin
 
Join Date: May 2008
Location: Front Row Center
Ohhh those smart "Russians" they have given the world so much ... DVV where are the pics of their moon landings, i must admit , i never saw them ....
  Reply With Quote
Old 15th February 2012, 11:40 PM   #2419
GloBug is offline GloBug  Canada
Banned
 
Join Date: Jun 2011
Luna 2 was a Russian object that landed on the moon almost 10 years before the USA.

Give credit were credit is due. It was the GERMANS who put a man on the moon.

You didn't really think those guys are from Huntsville Alabama did you?

The pretzels and the funny shorts should have been your first clue.
  Reply With Quote
Old 16th February 2012, 12:05 AM   #2420
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Quote:
Originally Posted by a.wayne View Post
those smart "Russians" have given the world so much
List of Russian composers - Wikipedia, the free encyclopedia
Shostakovich - Piano Concerto No. 2: II. Andante - YouTube
__________________
The buck stops Here
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Quality Control differences = variations in sound quality? KT Class D 3 4th June 2014 01:02 AM
Sound Card for Measurements Marik Solid State 2 2nd January 2012 09:59 PM
Sound Card Recommendations (For Audio Measurements) dchisholm Equipment & Tools 5 16th July 2011 10:40 AM
How to protect sound card during amp measurements? okapi Everything Else 13 2nd September 2008 04:06 PM
Sound cards - test and measurements jackinnj Everything Else 2 5th July 2003 04:02 PM


New To Site? Need Help?

All times are GMT. The time now is 06:48 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2