Vuvuzela
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From: amdx on 1 Jul 2010 14:18 -- MikeK "amdx" <amdx(a)knology.net> wrote in message news:f0ad$4c25468a$18ec6dd7$29412(a)KNOLOGY.NET... > > > -- > MikeK > "RST Engineering" <jweir43(a)gmail.com> wrote in message > news:i0da269vgn1g0un1gb3epl61hjhvcspiic(a)4ax.com... >> On Fri, 25 Jun 2010 14:14:35 -0500, "amdx" <amdx(a)knology.net> wrote: >> >>>The vuvuzela produces notes at approximately 235Hz frequency and its >>>first >>>partial at 465Hz. >>> American tv soccer fans need a filter to rid the audio of the constant >>>noise caused be the vuvuzela. >>> >>> Here's your chance to be a hero! >>> Mike >>> >> What is a "partial". If you mean second harmonic, it is at 470, not >> 465. >> >> Jim > I didn't mean anything by it, that was a line from wikipedia. > > How about a few hemholtz resonators near the tv, > And how would that work with thousands of signals out of phase? > I added sci.physics.acoustics for their input. > MikeK I have had some second thoughts about a helmholtz resonator. Can a helmholtz resonator do it's job with thousands of signals coming in at all different phases? Mike
From: Rich Webb on 8 Jul 2010 08:19
On Fri, 25 Jun 2010 14:14:35 -0500, "amdx" <amdx(a)knology.net> wrote: >The vuvuzela produces notes at approximately 235Hz frequency and its first >partial at 465Hz. > American tv soccer fans need a filter to rid the audio of the constant >noise caused be the vuvuzela. Looks like somebody else got there first. "The Vuvuzela Eraser New sound-separating technology removes vuvuzela horns from World Cup broadcasts. But only for French listeners" http://spectrum.ieee.org/podcast/at-work/innovation/the-vuvuzela-eraser and at the company's site http://audionamix.com/Vuvuzela/ -- Rich Webb Norfolk, VA |