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Cornerhorns and constant directivity [message #61729 is a reply to message #61728]

Fri, 15 January 2010 23:50

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

You're about right. I wouldn't expect much directivity control below 500Hz in freespace. The corners set the pattern for a couple octaves below that. In my opinion, this is the biggest benefit from corner placement: It gives the loudspeaker designer the opportunity to create a pattern having constant directivity all the way down to the Schroeder frequency.

On a related aside, I love good horn loaded loudspeakers and have always built them. But it cracks me up to watch people talk about cornerhorns and focus on the acoustic loading of a truncated basshorn. To me, that is trivial compared to the possibility of constant directivity. To build a loudspeaker designed to be placed in a corner and fail to incorporate constant directivity horns or waveguides is a huge mistake. The biggest benefit of a cornerhorn is how it directs the sound field above the Schroeder frequency, not below it. A good cornerhorn is probably the only configuration I know of that can provide constant directivity all the way down to the Schroeder frequency, approximately 100Hz or so.

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[Message index]

		4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Wed, 16 December 2009 22:57
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Thu, 17 December 2009 09:44
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: tom-m on Thu, 17 December 2009 18:32
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Thu, 17 December 2009 19:28
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Thu, 17 December 2009 19:16
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Thu, 17 December 2009 21:12
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Fri, 18 December 2009 09:09
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: tom-m on Fri, 18 December 2009 09:51
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Fri, 18 December 2009 10:41
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: tom-m on Fri, 18 December 2009 16:52
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Fri, 18 December 2009 18:44
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: tom-m on Mon, 28 December 2009 13:00
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Mon, 28 December 2009 13:10
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Mon, 21 December 2009 19:44
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Mon, 21 December 2009 20:55
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: feket663 on Sun, 27 December 2009 11:02
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Sun, 27 December 2009 12:12
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: feket663 on Sun, 27 December 2009 14:53
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Sun, 27 December 2009 17:52
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: feket663 on Mon, 28 December 2009 14:56
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Mon, 28 December 2009 21:41
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Thu, 31 December 2009 17:37
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Fri, 01 January 2010 08:39
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Tue, 12 January 2010 22:39
		Cornerhorn Ruminations By: Wayne Parham on Wed, 13 January 2010 08:56
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Wed, 13 January 2010 18:14
		Room Treatments By: Wayne Parham on Wed, 13 January 2010 21:25
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Wed, 13 January 2010 22:58
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: tom-m on Wed, 13 January 2010 23:22
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Thu, 14 January 2010 17:30
		seven π photos By: Wayne Parham on Thu, 14 January 2010 19:32
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: tom-m on Fri, 15 January 2010 15:31
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Fri, 15 January 2010 16:55
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: tom-m on Fri, 15 January 2010 22:01
		Cornerhorns and constant directivity By: Wayne Parham on Fri, 15 January 2010 23:50
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Sat, 13 March 2010 04:56
		Crossover considerations - power handling, frequency, slope, etc. By: Wayne Parham on Sat, 13 March 2010 10:35
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Sat, 13 March 2010 17:38
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Infrasonic on Tue, 16 March 2010 17:54
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Tue, 16 March 2010 18:29
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Infrasonic on Tue, 16 March 2010 19:06
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Tue, 16 March 2010 21:15
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Wed, 27 November 2013 20:16
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Thu, 28 November 2013 09:35
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Infrasonic on Wed, 17 March 2010 00:50
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Sun, 06 June 2010 06:25
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Sun, 06 June 2010 09:22
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Mon, 07 June 2010 20:19
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Mon, 07 June 2010 21:01
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Psychoacoustic on Mon, 07 June 2010 21:11
		Re: 4 Pi and 7 Pi bass response- More similar or different? By: Wayne Parham on Tue, 08 June 2010 08:17

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