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141 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Mon, 24 September 2012 14:06 «»
By: Wayne Parham
Re: Six Pi Review
…the anomalies, which proves the absense of self-interference from the nearest boundaries, the walls adjacent to the corners. The fact that the anomalies move in frequency proves them to be caused by room modes and not by self-interference.
Looking at …
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Forum: Speaker «»
Posted on: Tue, 05 April 2011 15:24 «»
By: Wayne Parham
Room modes, multisubs and flanking subs
…(two subs total). The idea is to counter self-interference from boundary reflections in the modal region using multiple sources to smooth the sound field. Where one sub and its reflection cancel each other out, another sub in a different location can …
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Forum: Pi Speakers «»
Posted on: Mon, 03 December 2018 17:29 «»
By: Wayne Parham
Re: Amp for 4pi speakers
…ing. This is what provides the smoothing of self-interference anomalies from nearest boundaries.
As an aside, I developed the flanking sub approach from three influences, one of which was the 2.5-way configuration. A 2.5-way loudspeaker has a …
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Forum: Pi Speakers «»
Posted on: Sun, 08 March 2015 10:42 «»
By: Wayne Parham
Re: Four Pi Frequency Response
…made indoors. We're seeing room modes and self-interference. The dips around 100Hz to 150Hz look like self-interference from the nearest boundary, which are precisely what flanking subs correct.
You'll notice your first measurement shows this dip too…
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Forum: Room Acoustics «»
Posted on: Tue, 18 December 2012 11:13 «»
By: Wayne Parham
Re: speaker location and type
…are a great idea, because they remove self-interference from the wall they are mounted in. This also largely reduces the need for flanking subs. It's the same thing for constant directivity cornerhorns - They don't really need flanking subs because they…
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Forum: Pi Speakers «»
Posted on: Mon, 24 October 2011 17:36 «»
By: Wayne Parham
Re: Helper Woofer Location
…speaker and the wall behind it. That way, self-interference from those two boundaries is mitigated, as are the higher frequency vertical modes that usually manifest in this range. It doesn't need to be run any higher than the Schroeder frequency, which …
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Forum: Pi Speakers «»
Posted on: Thu, 06 October 2011 14:46 «»
By: Wayne Parham
Re: Speaker placement and wavefront launch
…also what causes it to become distorted by self-interference, room modes, diffraction and refraction. When a wavefront encounters a disturbance like a sharp edge that causes diffraction or an object that refracts part of the wave, then a new vectored …
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Forum: Pi Speakers «»
Posted on: Thu, 31 March 2011 23:40 «»
By: Wayne Parham
Options in a nutshell
…wall behind them, this tends to create a self-interference notch around in the 100Hz to 200Hz region.
So I recommend placing a sub on the ground beside and slightly behind each main speaker, which are generally placed at ear level on stands. Low-pass …
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Forum: Pi Speakers «»
Posted on: Wed, 07 January 2009 11:25 «»
By: Wayne Parham
Re: Floor Bounce ?
…a reflection from the floor that creates a self-interference notch. It usually occurs between 100Hz and 200Hz, but is totally dependent on the height of the speaker and the distance to the listener. What causes it is a path length difference between the…
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Forum: Speaker «»
Posted on: Thu, 27 October 2016 08:42 «»
By: Wayne Parham
Re: Small speaker flanking sub limitations.
…modal region. This smooths room modes and self-interference notches. At low frequencies, smoothing is accomplished by placing subs around the room, distant from one another. At higher frequencies, where localization can occur, you want the sound …
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