3db Audioholic Slumlord Sep 7, 2002 16,489 0 113 65 Ottawa Canada Jan 31, 2019 #1 Its a really nice demonstration using pink noise. I wish they would have used some music with both male and female vocals to drive the point home. Pink noise is still to abstract for me to understand. <iframe width="624" height="390" src=" " frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> Reactions: shadyJ, AcuDefTechGuy, Swerd and 1 other person
Its a really nice demonstration using pink noise. I wish they would have used some music with both male and female vocals to drive the point home. Pink noise is still to abstract for me to understand. <iframe width="624" height="390" src=" " frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
S shadyJ Speaker of the House Staff member Oct 16, 2006 12,053 0 113 Jan 31, 2019 #2 Pink noise or white noise is the right tone to use for this. It is the playing of all frequencies simultaneously. It would be more difficult to discern the effects of comb filtering with a vocal. You need to use wide band content to really heard this effect clearly, like a full orchestra, but its still better with a noise color. Keep in mind that demo is more severe than you would hear in a real MTM since that affects all frequency bands. That effect would especially be evident in the small wavelengths of tweeter bands, but that would not occur in an MTM center since it only has one tweeter. By the way, you can do this same trick with an MTM center speaker by simply having someone rotate the speaker with a listener in a single location. That will let you know how much your center is affected by this phenomena. If you want to know what it looks like, see some of my center channel reviews. Look at this graph for instance, where the lobing causes patterns that make this graph look almost like a palm tree:
Pink noise or white noise is the right tone to use for this. It is the playing of all frequencies simultaneously. It would be more difficult to discern the effects of comb filtering with a vocal. You need to use wide band content to really heard this effect clearly, like a full orchestra, but its still better with a noise color. Keep in mind that demo is more severe than you would hear in a real MTM since that affects all frequency bands. That effect would especially be evident in the small wavelengths of tweeter bands, but that would not occur in an MTM center since it only has one tweeter. By the way, you can do this same trick with an MTM center speaker by simply having someone rotate the speaker with a listener in a single location. That will let you know how much your center is affected by this phenomena. If you want to know what it looks like, see some of my center channel reviews. Look at this graph for instance, where the lobing causes patterns that make this graph look almost like a palm tree:
gene Audioholics Master Chief Administrator Jul 1, 2002 10,226 0 120 52 Florida www.audioholics.com Jan 31, 2019 #3 The only company I know of that promotes dual center channels is Axiom. IMO, the only time dual centers make sense is in an Auro 3D setup where the 2 centers are discrete channels (ear level vs height), NOT a single mono source.
The only company I know of that promotes dual center channels is Axiom. IMO, the only time dual centers make sense is in an Auro 3D setup where the 2 centers are discrete channels (ear level vs height), NOT a single mono source.
3db Audioholic Slumlord Sep 7, 2002 16,489 0 113 65 Ottawa Canada Feb 1, 2019 #4 shadyJ said: Pink noise or white noise is the right tone to use for this. It is the playing of all frequencies simultaneously. It would be more difficult to discern the effects of comb filtering with a vocal. You need to use wide band content to really heard this effect clearly, like a full orchestra, but its still better with a noise color. Click to expand... SInce pink noise/white noise is wide band, signicantly wider than that of an orchestra and its using this colored noise to demonstrate comb filtering, is it really that much of an issue in everyday HT life? Is it even audible?
shadyJ said: Pink noise or white noise is the right tone to use for this. It is the playing of all frequencies simultaneously. It would be more difficult to discern the effects of comb filtering with a vocal. You need to use wide band content to really heard this effect clearly, like a full orchestra, but its still better with a noise color. Click to expand... SInce pink noise/white noise is wide band, signicantly wider than that of an orchestra and its using this colored noise to demonstrate comb filtering, is it really that much of an issue in everyday HT life? Is it even audible?
S shadyJ Speaker of the House Staff member Oct 16, 2006 12,053 0 113 Feb 1, 2019 #5 3db said: SInce pink noise/white noise is wide band, signicantly wider than that of an orchestra and its using this colored noise to demonstrate comb filtering, is it really that much of an issue in everyday HT life? Is it even audible? Click to expand... Comb filtering can definitely affect the sound quality. Colored noises will make the effects very audible, but they can still be heard with regular content.
3db said: SInce pink noise/white noise is wide band, signicantly wider than that of an orchestra and its using this colored noise to demonstrate comb filtering, is it really that much of an issue in everyday HT life? Is it even audible? Click to expand... Comb filtering can definitely affect the sound quality. Colored noises will make the effects very audible, but they can still be heard with regular content.
