KindredHyperion Posted October 10, 2008 Share Posted October 10, 2008 It was close between this forum, TNG and the Training and Education forum for this, so feel free to move if appropriate. Anyway basically wondering if anyone might be able to help me with my music tech homework ( ) by telling me what length of audio cable would cause a noticeable delay? This isn't a situation I've ever come across...! A Link to comment Share on other sites More sharing options...
bruce Posted October 10, 2008 Share Posted October 10, 2008 Clue. It would be too heavy to lift. Perhaps even with a forklift... didn't we discuss this about a week ago? edit: yes, we did... Link to comment Share on other sites More sharing options...
KindredHyperion Posted October 10, 2008 Author Share Posted October 10, 2008 Oh gawd, sorry, so you did... Thanks! Link to comment Share on other sites More sharing options...
rob098 Posted October 10, 2008 Share Posted October 10, 2008 It was close between this forum, TNG and the Training and Education forum for this, so feel free to move if appropriate. Anyway basically wondering if anyone might be able to help me with my music tech homework ( ) by telling me what length of audio cable would cause a noticeable delay? This isn't a situation I've ever come across...! A Hi Adam I'm quoting tinternet here:"All electromagnetic radiation, including light, radio transmission and electricity, travels at approximately 186,000 miles (300,000 kilometers) per second; more than seven times around the equator in one second. More precisely, the speed is 299,792,458 meters per second in a vacuum" So in other words, sounds like electrical signals travel very quickly down cables and wouldn't induce a noticeable delay (not practically anyway)Are you sure the question doesn't relate to sound reinforcement scenarios whereby speed of sound / distances are used to calculate "delay lines" or speakers further up the room/field so that they all sound in time with each other? Namely time alignment. Now don't blame me if I get your coursework wrong for you! All the bestRob Link to comment Share on other sites More sharing options...
drsound Posted October 10, 2008 Share Posted October 10, 2008 Leccy moves near as dammit as fast as light - light is 3 x 10^8 m/s and the average cable will conduct at 2 x 10^8 m/s. The reason for the difference currently eludes me but I'm sure uncle Google will help you there. Anyway, to get back to the point, to have a 1ms delay your cable would have to be 200km long. At that length it's fairly likely that any meaningful signal you'd put in at the other end would be long gone anyway - resistive losses, capacitive deformation and inductive coupling would see to this. I really wouldn't worry about it... Link to comment Share on other sites More sharing options...
mervaka Posted October 10, 2008 Share Posted October 10, 2008 you need to be more worried about things like the resistive, and maybe the inductive and capacitive properties of the cable. EDIT: beaten to the mark Link to comment Share on other sites More sharing options...
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