Very well put Dale, exactly as I see it too. 73 Stephen G4SJP
On 17 February 2015 at 02:17, d...@lightstream.net <d...@lightstream.net> wrote: > It seems that the term "Polarity" could be applicable to a single device, > such as a loudspeaker, without reference to any other device. Connect the > plus terminal of a 1.5v battery to the (+) terminal of a loudspeaker, and > presumably the cone will move outward. Reversing the polarity of either > the battery or the loudspeaker (but not both), will cause the cone will > move in the opposite direction. > > But the "Phase" of a single device/measurement is kind of a meaningless > concept without reference to another device/measurement. > > So perhaps the proper terminology is dependent upon context. At least that > distinction works for my simple mind. > > 73, Dale > WA8SRA > > > > > On Mon, Feb 16, 2015 at 2:09 PM, Stephen Prior <eastbrantw...@gmail.com> > > wrote: > > > >> ... polarity is to do with the direction in which the loudspeaker cone > >> moves for a given direction of > >> audio frequency current (Fleming's left hand rule etc.). So if two > >> speakers have the same "polarity" then they will both move forwards or > >> backwards at the same time... > > > > =========== > > I realize this discussion is kinda pointless and not worth prolonging, > but > > nonetheless... it seems that if both speakers go in and out at the same > > time, the resulting sound waves would be in phase; whereas if one speaker > > goes out when the other goes in, the sound waves would be considered to > be > > out of phase (i.e. the compressions and the rarefactions would cancel). > So > > at least in the case of a pair of speakers sitting side-by-side and fed > > with the same audio, switching the so-called "polarity" of one would > > indeed > > change its phase relative to the other by 180 deg. > > > > Tony KT0NY > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to eastbrantw...@gmail.com > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
