tolley1466 Posted November 23, 2008 Share Posted November 23, 2008 Could someone define harmonics for me? Thanks, Link to comment Share on other sites More sharing options...
boswell Posted November 23, 2008 Share Posted November 23, 2008 Wiki, Google Link to comment Share on other sites More sharing options...
paulears Posted November 23, 2008 Share Posted November 23, 2008 Simple mathmatical relationships between frequencies, as in a 100Hz fundamental will have harmonics at 200, 400, 800 etc. If you use the wiki or Google you'll find out that it gets much more complicated - as the 200 and 400 hz components can also produce an output at 600 - being the sum. In the audio band it is harmonics that give instruments a particular timbre - odd numbered harmonics or even numbered harmonics mean instruments sound very different. Up in radio frequency land, harmonics can be responsible for wiping out your radio mics on some channels, but not others. Plenty to do some research on - a huge and complicated subject. Link to comment Share on other sites More sharing options...
Vanjast Posted November 28, 2008 Share Posted November 28, 2008 Simon and Garfunkel Link to comment Share on other sites More sharing options...
gareth Posted November 28, 2008 Share Posted November 28, 2008 http://www.emerald-isle-gifts.com/images/big/harmonica.jpg ? Link to comment Share on other sites More sharing options...
Andrew C Posted November 28, 2008 Share Posted November 28, 2008 Oh boy. Friday night and they've been on the sauce again... Listen to Paul, (and Simon & Garfunkle) There lots to be learned there! Link to comment Share on other sites More sharing options...
gareth Posted November 28, 2008 Share Posted November 28, 2008 Oh boy. Friday night and they've been on the sauce again...Sorry! Just a little bit of irrelevant frivolity! I'll stop now. In my defence, I haven't touched a drop .... Link to comment Share on other sites More sharing options...
tolley1466 Posted November 28, 2008 Author Share Posted November 28, 2008 I meant the kind of hamonics you hear in acoustics and stuff. Boring definitions! Link to comment Share on other sites More sharing options...
gareth Posted November 28, 2008 Share Posted November 28, 2008 I meant the kind of hamonics you hear in acoustics and stuff.Ah, another prime example of asking the right question being essential if you want the right answer! Link to comment Share on other sites More sharing options...
Bobbsy Posted November 29, 2008 Share Posted November 29, 2008 Actually, in this case the basic principles of harmonics (and their mathematical relationship) are the same whether you're talking sound or RF. As for an actual answer, I started typing one, then checked the Wikipedia entry on the subject and I can't better the first few paragraphs there. Bob Link to comment Share on other sites More sharing options...
drsound Posted December 9, 2008 Share Posted December 9, 2008 Actually, in this case the basic principles of harmonics (and their mathematical relationship) are the same whether you're talking sound or RF.And indeed electrical harmonics (even harmonics is mechanical structures are the same). Harmonics are why switch mode power supply = noise = bad thing in electrical supplies - especially when they're feeding sound gear. You might be interested to also look up how harmonics change the crest factor for some interesting information on why your 16A breaker trips when you think you've only got it loaded to 8A. This is analogous to acoustic harmonics and explains (partly) why distorted music can hurt ears and drivers at low apparent power. Link to comment Share on other sites More sharing options...
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