HPF
in [Live Sound]
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From: Arny Krueger on 15 Jul 2008 08:10 "Eeyore" <rabbitsfriendsandrelations(a)hotmail.com> wrote in message news:487992CC.38ADE6BC(a)hotmail.com > "Ron(UK)" wrote: > >> Arny Krueger wrote: >>> Proximity effect is an example of an acoustical filter. >> How can an effect that boosts frequencies be described >> as a filter? >> Filters remove > Sorry Ron, totally wrong. Filters can either cut or boost > by design. Never heard of a 'peaking filter' for example ? Just a friendly reminder about all-pass filters, which may neither cut nor boost, but just change phase or timing. Note that Steve Maki just posted: www.national.com/an/AN/AN-779.pdf From section 1.1: "In circuit theory, a filter is an electrical network that alters the amplitude and/or phase characteristics of a signal with respect to frequency" My definition, that I was repeatedly flamed at for posting: "...anything that changes the frequency response is some kind of a filter." I guess my problem is that I read too much. I've also been working with audio filters for over 50 years. So that must be my other problem - too much real-world experience.
From: liquidator on 15 Jul 2008 09:25 "Steve Maki" <steve(a)nospam.com> wrote in message news:v1ao74lj9fpp8lqsjsjppmobpu9trvhefp(a)4ax.com... > On Sun, 13 Jul 2008 06:29:48 +0100, Eeyore <rabbitsfriendsandrelations(a)hotmail.com> wrote: > > >> > Proximity effect is an example of an acoustical filter. > > >> How can an effect that boosts frequencies be described as a filter? > >> > >> Filters remove > > >Sorry Ron, totally wrong. Filters can either cut or boost by design. > >Never heard of a 'peaking filter' for example ? > > www.national.com/an/AN/AN-779.pdf > > From section 1.1: > > "In circuit theory, a filter is an electrical network that alters the > amplitude and/or phase characteristics of a signal with respect to > frequency" > > It's a very informative filter primer. One should come away from it > with the idea that the "gain", or lack of it, in a filter is a secondary, > trivial characteristic. > > -- > Steve Maki I suppose someone will now suggest a microphone is an electrical network...
From: George's ProSound Company on 15 Jul 2008 09:30 "liquidator" <mikeh(a)mad.scientist.com> wrote in message news:g5i8gm$b6c$1(a)aioe.org... > > "Steve Maki" <steve(a)nospam.com> wrote in message > news:v1ao74lj9fpp8lqsjsjppmobpu9trvhefp(a)4ax.com... >> On Sun, 13 Jul 2008 06:29:48 +0100, Eeyore > <rabbitsfriendsandrelations(a)hotmail.com> wrote: >> >> >> > Proximity effect is an example of an acoustical filter. >> >> >> How can an effect that boosts frequencies be described as a filter? >> >> >> >> Filters remove >> >> >Sorry Ron, totally wrong. Filters can either cut or boost by design. >> >Never heard of a 'peaking filter' for example ? >> >> www.national.com/an/AN/AN-779.pdf >> >> From section 1.1: >> >> "In circuit theory, a filter is an electrical network that alters the >> amplitude and/or phase characteristics of a signal with respect to >> frequency" >> >> It's a very informative filter primer. One should come away from it >> with the idea that the "gain", or lack of it, in a filter is a secondary, >> trivial characteristic. >> >> -- >> Steve Maki > > I suppose someone will now suggest a microphone is an electrical > network... we beat this dead horse a few months ago with arnii and eyesore claiming that everyfucking thing is a filter the air, the audience, the room, the parking lot the street lamps, as everything effects sound in some way with thier IDIOTIC brainless attempt to be right they in fact have made everything on earth into a filter its pointless to try to get through to them that a stop sign, is called a stop sign, not a octangle and there are things that are called filters, and other things that effect sound which simply are not called filters such as microphones george > >
From: Ron(UK) on 15 Jul 2008 09:36 liquidator wrote: > "Steve Maki" <steve(a)nospam.com> wrote in message > news:v1ao74lj9fpp8lqsjsjppmobpu9trvhefp(a)4ax.com... >> On Sun, 13 Jul 2008 06:29:48 +0100, Eeyore > <rabbitsfriendsandrelations(a)hotmail.com> wrote: >>>>> Proximity effect is an example of an acoustical filter. >>>> How can an effect that boosts frequencies be described as a filter? >>>> >>>> Filters remove >>> Sorry Ron, totally wrong. Filters can either cut or boost by design. >>> Never heard of a 'peaking filter' for example ? >> www.national.com/an/AN/AN-779.pdf >> >> From section 1.1: >> >> "In circuit theory, a filter is an electrical network that alters the >> amplitude and/or phase characteristics of a signal with respect to >> frequency" >> >> It's a very informative filter primer. One should come away from it >> with the idea that the "gain", or lack of it, in a filter is a secondary, >> trivial characteristic. >> >> -- >> Steve Maki > > I suppose someone will now suggest a microphone is an electrical network... > > How come these ancient old threads have been resurected? They were put to bed months ago! Ron(UK)
From: Eeyore on 15 Jul 2008 11:10
Steve Maki wrote: > Eeyore wrote: > > >> > Proximity effect is an example of an acoustical filter. > > >> How can an effect that boosts frequencies be described as a filter? > >> > >> Filters remove > > >Sorry Ron, totally wrong. Filters can either cut or boost by design. > >Never heard of a 'peaking filter' for example ? > > www.national.com/an/AN/AN-779.pdf > > From section 1.1: > > "In circuit theory, a filter is an electrical network that alters the > amplitude and/or phase characteristics of a signal with respect to > frequency" > > It's a very informative filter primer. One should come away from it > with the idea that the "gain", or lack of it, in a filter is a secondary, > trivial characteristic. Never mind acoustic filters ! Ever heard of a 'bass trap' ? Graham |