Sakanizani pogwiritsa ntchito buku lopanga - kapena mwinamwake ngakhale pulogalamu yamalonda yowonongeka - ndipo mumatha kuwerenga mawu akuti Total Harmonic Distortion (omasuliridwa monga THD). Mukhoza kupeza izi pazokamba, mafoni, mafilimu / ma MP3, amplifiers, preamplifiers, olandila , ndi zina. Kwenikweni, ngati zimaphatikizapo kutulutsa phokoso ndi nyimbo, ziyenera (ziyenera) kuti zikhale ndi izi. Kuwonongeka kwakukulu kwa Harmonic n'kofunika pofufuza zipangizo, koma pazinthu zina.
Kodi Kupasuka Kwa Harmonic N'kutani?
Mafotokozedwe a Total Harmonic Distortion ndi omwe amafanizitsa zizindikiro zowunikira komanso zotulutsa zizindikiro, ndi kusiyana mu magawo omwe amawerengedwa monga peresenti. Kotero inu mukhoza kuwona THD yowerengeka monga 0.02 peresenti ndi zikhalidwe zapadera za mafupipafupi ndi magetsi ofanana nawo pambuyo pake (mwachitsanzo 1 kHz 1 Vrms). Pali ndithudi masamu omwe amawerengedwa kuti awonongeke Harmonic Distortion, koma zonse zomwe zimayenera kumvetsetsa ndizo kuti peresenti imayimira kusokoneza kwa harmonic kapena kupotoka kwa chizindikiro chopereka - magawo ochepa ndi abwino. Kumbukirani, chizindikiro chowonetsera ndi kubalana ndipo sichikhala ndipangidwe labwino, makamaka pamene zigawo zambiri zimagwiritsidwa ntchito muwotchi. Poyerekeza zizindikiro ziwiri pa graph, mungaone kusiyana pang'ono.
Nyimbo zimapangidwa ndi maulendo ofunika komanso a harmonic . Kuphatikiza kwa maulendo ofunika ndi a harmonic amapereka zipangizo zoimbira mwapadera ndikumvetsera khutu laumunthu kuti lilekanitse pakati pawo. Mwachitsanzo, violin ikuyimba pakati Alemba imatulutsa mafupipafupi a 440 Hz pamene ikubweretsanso ma harmoniki (kuchuluka kwa mafupipafupi) pa 880 Hz, 1220 Hz, 1760 Hz, ndi zina zotero. Cello imasewera pakati Pomwe mawu akuti violin amamvekanso ngati cello chifukwa cha maulendo ake enieni ndi a harmonic.
Chifukwa Chake Kuwonongeka kwa Harmonic N'kofunika
Pomwe chisokonezo chonse cha Harmonic chawonjezeka pamtunda wina, mutha kuyembekezera kuti molondola mawuwo asokonezedwe. Izi zimachitika pamene maulendo osagwirizana a harmonic - omwe sali nawo mu chizindikiro choyambirira - amapanga ndikuwonjezeka ku zotsatira. Kotero THD ya peresenti ya 0.1 ingatanthawuze kuti 0.1 peresenti ya chizindikiro chowonetsera ndi yonyenga ndipo ili ndi kupotoza kosayenera. Kusintha kwakukulu kumeneku kungabweretse ku chidziwitso chomwe zida zimveka ngati zachilendo osati monga momwe ziyenera kukhalira.
Koma zoona zake n'zakuti, Total Harmonic Distortion silingamveke ndi makutu ambiri a anthu, makamaka popeza opanga amapanga mankhwala ndi THD zomwe zimagawidwa pang'ono. Ngati simungathe kumva kusiyana kwa theka la peresenti, ndiye kuti simungathe kuzindikira chiwerengero cha THD cha peresenti ya 0.001 (zomwe zingakhale zovuta molondola molondola, komanso). Osati kokha kokha, koma mafotokozedwe a Total Harmonic Distortion ndi ofunika mtengo omwe saganizira momwe ma harmoniki amodzi ndi otsika amakhala ovuta kuti anthu amve motsutsana ndi anzawo awo osamvetseka ndi apamwamba. Kotero nyimbo zoimba zimathandizanso.
Chigawo chirichonse chimapanga mlingo wina wa kupotoka, choncho ndibwino kufufuza manambala kuti muteteze mawu oyeretsa. Komabe, kuchuluka kwa Total Harmonic Distortion sikofunikira kwambiri pamene mukuyang'ana chithunzi chachikulu, makamaka popeza chikhalidwe chochuluka nthawi zambiri sichiposa 0.005 peresenti. Kusiyana kwakukulu kwa THD kuchokera ku mtundu wina wa chigawo china kupita ku china kungakhale kosafunikira potsutsana ndi zinthu zina, monga magwero apamwamba a audio, zipangizo zamakono , ndi kusankha oyankhula bwino , poyambira.