Li-harmoniki li u thusa ho khetholla liletsa tse fapaneng tsa 'mino
Haeba u ithutile taeo leha e le efe ea li-acoustics , thekenoloji ea seea-le-moeeng, kapa boenjiniere ba elektronike, u ka 'na ua hopola ho koahela taba ea frequency ea harmonic. Ke karolo ea bohlokoa ea hore na 'mino o utloahala mme oa lemoha joang. Maqhubu a harmonic ke karolo e le 'ngoe e re thusang ka mokhoa o nepahetseng hore re tsebe boleng bo ikhethang ba molumo o entsoeng ka liletsa tse sa tšoaneng, esita le ha ba bapala lintlha tse tšoanang.
Tlhaloso ea Kakaretso ea Harmonic
Kakaretso ea li-harmonic ke mokhoa o tloaelehileng le o pheta-phetoang oa mokoloko oa maqhubu oa pele, o tsejoang e le motlakase oa mantlha. Haeba leqhubu le leholo le thehiloe ho hertz ea 500, le hlaheloa ke lekhetlo la pele la li-harmonic ho hertz ea 1000, kapa habeli ka makhetlo a mabeli. Palo ea bobeli ea li-harmonic e hlaha ka li-hertz tse 1500, e leng mararo a makhetlo a mararo, 'me lekhetlo la boraro la li-harmonic ke 2000 hertz, e leng quadruple ea metsoako ea motheo, joalo-joalo.
Ketsahalong e 'ngoe, harmonic ea pele ea mokokotlo oa hertz 750 ke hertz ea 1500, le harmonic ea bobeli ea 750 hertz ke 2250 hertz. Li-harmonic tsohle li na le nako le nako hangata 'me li ka senyeha ka har'a letoto la li-node le li-antinodes.
Liphello tsa Palo ea Harmonic
Hoo e batlang e le lisebelisoa tsohle tsa 'mino li hlahisa sebopeho se emeng sa maqhubu se nang le mefuta e meholo le ea ma-harmonic. Sebopeho se nepahetseng sa maqhubu ana se etsa hore tsebe ea motho e lemohe phapang pakeng tsa lintlha tse peli tsa lipina tsa thoriso ka bonngoe ka nako e le 'ngoe (maqhubu) le boima ba matla (amplitude). Hona ke kamoo re tsebang kateng hore katara e utloahala joaloka katara, eseng oboe kapa terompeta kapa piano kapa drum. Ho seng joalo, bohle le ntho e 'ngoe le e' ngoe e ne e tla utloahala. Libini tse nang le bokhoni li ka etsa liletsa tsa tlhaho ka ho mamela le ho bapisa mekhahlelo ea li-harmoniic pakeng tsa liphetoho.
Harmonics Versus Overtones
Lentsoe "overtones" le atisa ho sebelisoa lipuisanong tse amanang le li-frequencies tsa harmonic. Le hoja ho le joalo-hamonate ea bobeli ke ea pele ho feta, harmonic ea boraro ke ea bobeli, le joalo-ka mantsoe ana a mabeli a arohane. Li-overtones li tlatsetsa boleng ba kakaretso kapa nako ea molumo oa liletsa.
Harmonic Frequency Distortion ho Lipuo
Bomameli ba na le boikarabelo ba ho fana ka litšoantšo tse nepahetseng tsa li-harmonic tsa liletsa tseo ba li etsang. Ho lekanya phapang pakeng tsa melumo e kenang le sehlahisoa sa libui, moqapi oa Total Harmonic Distortion (THD) o abetsoe ho sebui se seng le se seng-ho fokotsa lintlha, ho ntlafatsa mokhoa oa ho bua ha sebui. Ka mohlala, THD ea 0.05 e bolela hore karolo ea 0.05 lekholong ea molumo o tsoang ho sebui o sothehile kapa o silafalitsoe.
Litaba tsa THD ke bareki ba lehae hobane ba khona ho sebelisa lipalo tsa THD tse thathamisitsoeng bakeng sa sebui ho hlahloba boleng bo utloahalang boo ba ka lebella ho bo fumana ho sebui seo. Ha e le hantle, phapang pakeng tsa li-harmoniki li nyenyane, 'me batho ba bangata ba ke ke ba bona phapang ea karolo ea halofo lekholong ho THD ho tloha ho sebui se seng ho ea ho se latelang.
Leha ho le joalo, ha palo ea harmonic e sothehile ka esita le karolo ea 1 lekholong, lisebelisoa tsa ho rekota li utloahala e seng tsa tlhaho, kahoo ke bohlale ho lula hōle le libui qetellong ea THD.