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Re: Mono "flanking sub" [message #83336 is a reply to message #83335]

Wed, 10 August 2016 15:01

Wayne Parham
Messages: 18688
Registered: January 2001

Illuminati (33rd Degree)

When we talk about phase anomalies (time domain) or when we talk about peaks and dips in the amplitude response (frequency domain), we're essentially talking about flip sides of the same coin. I've always been more focused on the frequency domain because I know that anomalies in frequency response are audible, when the peaks or dips are large and wide enough. Anomalies in the time domain are a little more controversial, unless the defects are large enough to cause a time delay between two sounds that were supposed to be simultaneously presented. But again, the two things are really inter-related, and problems in the time domain are presented in the frequency domain, and vice-versa.

Beyond that, see the Pi Speakers FAQ, and especially the sections about Crossovers, Room Effects and Loudspeaker Interactions and Simulations and Measurements. They talk a lot about what is required to get proper summing between adjacent subsystems. This will address what you asked "how important you feel phase is between the drivers in a speaker?" They also talk a lot about room interactions, room modes and the ways to correct the problems that result. That will answer your questions about flanking subs and the frequency range they're used in.

In a nutshell, it is important to get summing right in the statistical range, above 200Hz. This is what you're calling "phase between drivers." We want them to act as a single point source. On the other hand, it is impossible to do this in the modal range, below 200Hz, because of the multiple reflections from each room boundary. Since we can't achieve a point source in the modal region, we want dense interference to smooth the sound field instead.

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[Message index]

		Mono "flanking sub" By: jonone on Sat, 24 October 2015 05:50
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 25 October 2015 15:20
		Re: Mono "flanking sub" By: jonone on Mon, 26 October 2015 08:14
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 26 October 2015 08:44
		Re: Mono "flanking sub" By: jonone on Mon, 26 October 2015 12:05
		Re: Mono "flanking sub" By: jonone on Mon, 26 October 2015 15:06
		Re: Mono "flanking sub" By: Wayne Parham on Tue, 27 October 2015 13:23
		Re: Mono "flanking sub" By: johnnycamp5 on Tue, 27 October 2015 18:14
		Re: Mono "flanking sub" By: jonone on Thu, 29 October 2015 04:10
		Re: Mono "flanking sub" By: johnnycamp5 on Thu, 29 October 2015 11:24
		Re: Mono "flanking sub" By: jonone on Thu, 29 October 2015 14:23
		Re: Mono "flanking sub" By: johnnycamp5 on Fri, 30 October 2015 05:10
		Re: Mono "flanking sub" By: jonone on Fri, 30 October 2015 05:17
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 30 October 2015 16:37
		Re: Mono "flanking sub" By: johnnycamp5 on Fri, 30 October 2015 17:58
		Re: Mono "flanking sub" By: jonone on Sat, 31 October 2015 13:21
		Re: Mono "flanking sub" By: Wayne Parham on Sat, 31 October 2015 15:37
		Re: Mono "flanking sub" By: jonone on Sun, 08 November 2015 13:52
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 09 November 2015 12:57
		Re: Mono "flanking sub" By: jonone on Mon, 09 November 2015 14:44
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 09 November 2015 21:14
		Re: Mono "flanking sub" By: jonone on Tue, 10 November 2015 14:06
		Re: Mono "flanking sub" By: Wayne Parham on Tue, 10 November 2015 14:43
		Re: Mono "flanking sub" By: jonone on Tue, 10 November 2015 15:21
		Re: Mono "flanking sub" By: jonone on Tue, 10 November 2015 16:21
		Re: Mono "flanking sub" By: Wayne Parham on Wed, 11 November 2015 14:16
		Re: Mono "flanking sub" By: jonone on Wed, 11 November 2015 14:38
		Re: Mono "flanking sub" By: jonone on Tue, 24 November 2015 11:01
		Re: Mono "flanking sub" By: Wayne Parham on Tue, 24 November 2015 12:46
		Re: Mono "flanking sub" By: jonone on Tue, 24 November 2015 14:01
		Re: Mono "flanking sub" By: jonone on Wed, 25 November 2015 16:12
		Re: Mono "flanking sub" By: Wayne Parham on Wed, 25 November 2015 18:08
		Re: Mono "flanking sub" By: jonone on Thu, 26 November 2015 02:58
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 27 November 2015 16:23
		Re: Mono "flanking sub" By: jonone on Sat, 28 November 2015 11:29
		Re: Mono "flanking sub" By: jonone on Sun, 29 November 2015 14:41
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 30 November 2015 10:31
		Re: Mono "flanking sub" By: jonone on Mon, 30 November 2015 12:27
		Re: Mono "flanking sub" By: johnnycamp5 on Tue, 01 December 2015 12:01
		Re: Mono "flanking sub" By: jonone on Tue, 01 December 2015 16:05
		Re: Mono "flanking sub" By: johnnycamp5 on Tue, 01 December 2015 20:10
		Re: Mono "flanking sub" By: jonone on Wed, 02 December 2015 02:58
		Re: Mono "flanking sub" By: johnnycamp5 on Wed, 02 December 2015 05:19
		Re: Mono "flanking sub" By: jonone on Wed, 02 December 2015 07:07
		Re: Mono "flanking sub" By: jonone on Sat, 05 December 2015 08:27
		Re: Mono "flanking sub" By: johnnycamp5 on Sat, 05 December 2015 15:54
		Re: Mono "flanking sub" By: jonone on Sun, 06 December 2015 04:26
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 03:00
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 08:46
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 10:50
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 11:08
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 12:39
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 12:46
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 13:01
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 13:40
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 14:30
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 15:00
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 15:32
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 03:27
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 08:36
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 08:49
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 10:25
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 11:09
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 13:41
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 13:53
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 17:16
		Re: Mono "flanking sub" By: jonone on Sat, 16 July 2016 01:37
		Re: Mono "flanking sub" By: Wayne Parham on Sat, 16 July 2016 09:06
		Re: Mono "flanking sub" By: jonone on Sat, 16 July 2016 09:25
		Re: Mono "flanking sub" By: johnnycamp5 on Sat, 16 July 2016 11:48
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 17 July 2016 09:31
		Re: Mono "flanking sub" By: jonone on Sun, 17 July 2016 10:04
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 17 July 2016 11:16
		Re: Mono "flanking sub" By: jonone on Sun, 17 July 2016 12:05
		Re: Mono "flanking sub" By: jonone on Sun, 17 July 2016 12:55
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 17 July 2016 15:31
		Re: Mono "flanking sub" By: johnnycamp5 on Sun, 17 July 2016 16:18
		Re: Mono "flanking sub" By: jonone on Mon, 18 July 2016 07:52
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 18 July 2016 10:46
		Re: Mono "flanking sub" By: jonone on Wed, 10 August 2016 13:25
		Re: Mono "flanking sub" By: Wayne Parham on Wed, 10 August 2016 15:01
		Re: Mono "flanking sub" By: jonone on Thu, 11 August 2016 08:00
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 11 August 2016 08:40
		Re: Mono "flanking sub" By: jonone on Thu, 11 August 2016 14:54
		Re: Mono "flanking sub" By: jonone on Fri, 21 October 2016 12:52

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