Umsebenzi weukunciphisa umsindoibaluleke kakhulu kumahedisethi. Enye iwukunciphisa umsindo nokugwema ukukhuliswa kwevolumu ngokweqile, ukuze kuncishiswe umonakalo endlebeni. Okwesibili ukuhlunga umsindo ukuthuthukisa ikhwalithi yomsindo kanye nekhwalithi yekholi.
Ukuncishiswa komsindo kungahlukaniswa kube ukuncishiswa komsindo okwenziwayo nosebenzayo.
Ukuncishiswa komsindo okungenzi lutho nakhoukunciphisa umsindo ngokomzimba, ukuncishiswa komsindo okungenzi lutho kubhekisela ekusetshenzisweni kwezici zomzimba ukuhlukanisa umsindo wangaphandle endlebeni, ikakhulukazi ngokwakhiwa kwebhande lekhanda le-headset eliqina, ukwenziwa kahle kwe-acoustic yesikhala se-muffs yendlebe, ama-muffs endlebeni ngaphakathi kwempahla yokumunca umsindo nokunye. ukuze kuzuzwe umsindo ozwakalayo wamahedisethi. Ukuncishiswa komsindo okwenziwayo kusebenza kahle kakhulu ekuhlukaniseni imisindo yefrikhwensi ephezulu (njengezwi lomuntu), futhi ngokuvamile kunciphisa umsindo ngo-15-20dB.
Ukuncishiswa komsindo okusebenzayo yibo ubuchwepheshe obuphambili bokunciphisa umsindo i-ANC,I-ENC, CVC, DSP nokunye lapho abathengisi bekhuthaza umsebenzi wokunciphisa umsindo wamahedisethi.
Ukunciphisa umsindo we-ANC
I-ANC Active Noise Control (Active Noise Control) isebenza ngesimiso sokuthi umbhobho uqoqa umsindo ovela ngaphandle, bese uhlelo luwuguqule lube igagasi lomsindo elihlanekezelwe bese liwungeza ekugcineni kophondo. Umsindo wokugcina ozwiwa indlebe yomuntu uthi: Umsindo we-ambient + umsindo we-ambient we-contra-phase, izinhlobo ezimbili zomsindo ezibekwe phezulu ukuze kuzuzwe ukuncishiswa komsindo wezinzwa, ozuzayo nguyena.
Ukuncishiswa komsindo okusebenzayo kungahlukaniswa kube ukuncishiswa komsindo osebenzayo kwe-feedforward kanye nempendulo esebenzayo yokunciphisa umsindo ngokuya ngokuma okuhlukile kombhobho wokuthatha.
Ukunciphisa umsindo we-ENC
I-ENC (Environmental Noise Cancellation) iwukukhansela okusebenzayo kwama-90% womsindo ozungezile, ngaleyo ndlela kunciphisa umsindo we-ambient ufike ku-35dB, okuvumela abadlali ukuthi baxhumane ngokukhululekile ngezwi. Ngohlelo lombhobho okabili, ukubala okunembile kwendawo yesipika, kuyilapho kuvikela inkulumo eqondiwe eyinhloko, susa zonke izinhlobo zomsindo wokuphazamiseka endaweni.
Ukunciphisa umsindo we-DSP
I-DSP imfushane ngokucubungula isignali yedijithali. Ikakhulukazi ngomsindo wefrikhwensi ephezulu nephansi. Umqondo wukuthi imakrofoni ithatha umsindo endaweni yangaphandle, bese uhlelo lukopisha igagasi lomsindo elibuyela emuva elilingana nomsindo we-ambient, likhansele umsindo futhi lizuze ukuncishiswa komsindo okungcono. Umgomo wokunciphisa umsindo we-DSP uyafana nowokunciphisa umsindo we-ANC. Nokho, umsindo omuhle noma omubi we-DSP ukhanselana ngokuqondile ohlelweni.
Ukunciphisa umsindo we-CVC
I-Clear Voice Capture (CVC) ubuchwepheshe besofthiwe yezwi bokunciphisa umsindo. Ikakhulukazi i-echo ekhiqizwa ngesikhathi socingo. Isofthiwe ye-full-duplex yokukhansela umsindo wemakrofoni inikeza i-call echo nemisebenzi yokukhansela umsindo ozungezile, okuwubuchwepheshe obuphambili kakhulu bokunciphisa umsindo phakathi kwamahedisethi efoni ye-Bluetooth.
Ubuchwepheshe be-DSP (ukuqeda umsindo wangaphandle) buzuzisa kakhulu umsebenzisi wamahedsethi, kuyilapho i-CVC (ekhipha i-echo) izuzisa kakhulu olunye uhlangothi lwengxoxo.
Isikhathi sokuthumela: Jul-03-2023
