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16 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Thu, 18 July 2013 22:18 «»
By: Wayne Parham
Re: 4Pi crossover study
The π crossover will not work very well on the SEOS12 because SEOS horns have too much ripple. Designers using this horn usually incorporate notch filters to get decent response. To me, this is a deal breaker. That's why I did not adopt that horn in m...
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Forum: Speaker «»
Posted on: Thu, 08 October 2009 10:28 «»
By: Keith Larson
Re: Audibility of Phase
We are definitely on the same path and these are good words for refining the point. I guess another way to state this would be that speaker POLARITY effects both phase AND non-linear distortion. Since our ears are phase agnostic, this leaves the distortio...
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Forum: Speaker «»
Posted on: Wed, 07 October 2009 21:30 «»
By: Wayne Parham
Re: Audibility of Phase
You're right about the condition that exists at high drive levels. You and I have discussed this before. At extreme levels, where a driver becomes non-linear, some (most) act differently in one direction than the other. I've seen that in woofers in pa...
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Forum: Speaker «»
Posted on: Wed, 07 October 2009 16:32 «»
By: Keith Larson
Re: Audibility of Phase
The way I understand how the ear works is that the cells that are packed in the cochlea tube are tickled linearly along the tube path depending on the excitation signal wavelength. This is somewhat like a spectrum analyzer, except it is amplitude, not the...
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Forum: Speaker «»
Posted on: Sun, 04 October 2009 11:57 «»
By: Wayne Parham
Audibility of Phase
This has been a sort of hot-button topic of mine, over the years. There are a few manufacturers that have made "time alignment" a marketing catch phrase. It always sort of irks me. I prefer to discuss the position of lobes and nulls, because...
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Forum: Speaker «»
Posted on: Sun, 04 October 2009 09:46 «»
By: Keith Larson
Re: Dense Interference
Here is an example that might be of interest. It shows how sensitive our ears are (NOT) to phase. It shows that what we do perceive is the in-air superposition of interacting sources.
Constructive and Destructive Interference, Is Phase Audible or In-...
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Forum: Speaker «»
Posted on: Sun, 04 March 2007 06:08 «»
By: Marlboro
Re: anyone tried equidistant spacing?
My thought is to space the tweeters equidistantly - probably packed tightly together at the middle and expand to maybe 3" apart at the ends of the line. That way I would get earlier nodes but it should blur the frequency where I get nodes making them (hop...
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Forum: Speaker «»
Posted on: Fri, 13 January 2006 13:49 «»
By: Wayne Parham
Re: Interesting quote
There are some things we can hear pretty well, other things we can't. Here's one of the hot-button topics I've noticed pops up every few years, usually when some marketer has a new widget they want to sell:
Audibility of absolute phase
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Forum: Speaker «»
Posted on: Mon, 19 December 2005 16:53 «»
By: robertG
Re: What measurements matter to audibility?
Floyd Toole wrote very interesting papers a while back when he was at the CNRC.He also wrote less interesting papers at the head of Harman International R&D!For one, he wrote that any half decent engineer (or hobbyist for that matter) could design a "flat...
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Forum: Speaker «»
Posted on: Sun, 19 December 2004 13:49 «»
By: tomservo
Re: Accuracy versus subjective preference, yes
If one presumes that the speakers job is to reproduce the music as opposed to be part of its production (as in a guitar amp etc), then one can look at it from the perspective of the speaker deviating from an ideal device where what goes is in = what comes...
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