Ntchito yakuchepetsa phokosondizofunikira kwambiri pamutu. Chimodzi ndicho kuchepetsa phokoso ndi kupewa kukweza kwambiri mawu, kuti muchepetse kuwonongeka kwa khutu. Chachiwiri ndikusefa phokoso kuti muwongolere mawu komanso kuyimba bwino.
Kuchepetsa phokoso kungagawidwe kukhala chete komanso yogwira kuchepetsa phokoso.
Kuchepetsa phokoso lopanda phokoso kulinsokuchepetsa phokoso la thupi, kuchepetsa phokoso lopanda phokoso kumatanthawuza kugwiritsa ntchito mawonekedwe a thupi kuti adzilekanitse phokoso lakunja kuchokera m'makutu, makamaka kupyolera mu mapangidwe a mutu wamutu wamutu wolimba kwambiri, kukhathamiritsa kwa phokoso la makutu a khutu, makutu a khutu mkati mwa zipangizo zoyamwitsa ndi zina zotero. kuti mukwaniritse kutsekereza kwamphamvu kwa ma headset. Kuchepetsa phokoso lopanda phokoso ndikothandiza kwambiri popatula maphokoso okwera kwambiri (monga mawu amunthu), ndipo nthawi zambiri amachepetsa phokoso pafupifupi 15-20dB.
Kuchepetsa phokoso logwira ntchito ndiye ukadaulo wochepetsera phokoso wa ANC,Chithunzi cha ENC, CVC, DSP ndi zina zotero pamene amalonda amalimbikitsa ntchito yochepetsera phokoso la mahedifoni.
Kuchepetsa phokoso la ANC
ANC Active Noise Control (Active Noise Control) imagwira ntchito pa mfundo yakuti maikolofoni imasonkhanitsa phokoso lakunja lozungulira, ndiyeno makinawo amawasintha kukhala phokoso losokoneza ndikuwonjezera kumapeto kwa nyanga. Phokoso lomaliza lomwe khutu la munthu limamva ndi: Phokoso lozungulira + phokoso lozungulira, mitundu iwiri yaphokoso yomwe ili pamwamba kuti muchepetse phokoso, wopindula ndi iyemwini.
Kuchepetsa phokoso lokhazikika kumatha kugawidwa m'malo ochepetsera phokoso la feedforward ndikuyankha kumachepetsa phokoso molingana ndi malo osiyanasiyana a maikolofoni yonyamula.
Kuchepetsa phokoso la ENC
ENC (Environmental Noise Cancellation) ndikuletsa kogwira mtima kwa 90% ya kubweza kwa phokoso lozungulira, potero kuchepetsa phokoso lozungulira mpaka 35dB, kulola osewera kuti azilankhulana momasuka ndi mawu. Kupyolera mu gulu la maikolofoni apawiri, kuwerengetsera kolondola kwa malo a wokamba nkhani, kwinaku mukuteteza malankhulidwe akuluakulu, amachotsa phokoso lamtundu uliwonse m'chilengedwe.
Kuchepetsa phokoso la DSP
DSP ndiyofupika pakukonza ma siginolo a digito. Makamaka phokoso lapamwamba komanso lotsika. Lingaliro ndilakuti maikolofoni amanyamula phokoso kuchokera ku chilengedwe chakunja, ndiyeno dongosolo limakopera phokoso la phokoso lomwe liri lofanana ndi phokoso lozungulira, kuletsa phokosolo ndikupeza kuchepetsa phokoso. Mfundo yochepetsera phokoso la DSP ndi yofanana ndi kuchepetsa phokoso la ANC. Komabe, phokoso labwino ndi loipa la DSP limathetsana mwachindunji mu dongosolo.
CVC kuchepetsa phokoso
Clear Voice Capture (CVC) ndiukadaulo wamawu wochepetsera phokoso. Makamaka pamawu opangidwa panthawi yoyimba. Pulogalamu yoletsa phokoso la maikolofoni yaduplex imapereka ma call echo ndi ntchito zoletsa phokoso, yomwe ndiukadaulo wapamwamba kwambiri wochepetsera phokoso pakati pa mahedifoni a Bluetooth.
Ukadaulo wa DSP (kuchotsa phokoso lakunja) umapindulitsa kwambiri wogwiritsa ntchito mahedifoni, pomwe CVC (kuchotsa echo) imapindulitsa kwambiri mbali ina ya zokambirana.
Nthawi yotumiza: Jul-03-2023
