A cikin aiwatar da sautin kewaye, duka Dolby AC3 da DTS suna da halayyar da suke buƙatar masu magana da yawa yayin sake kunnawa.Koyaya, saboda dalilai na farashi da sarari, wasu masu amfani, kamar masu amfani da kwamfuta na multimedia, ba su da isassun lasifika.A wannan lokacin, ana buƙatar fasahar da za ta iya sarrafa siginar tashoshi da yawa kuma ta mayar da su cikin lasifika guda biyu masu kama da juna, kuma ta sa mutane su ji tasirin sauti na kewaye.Wannan fasaha ce ta kewaye da sauti.Sunan Ingilishi na kama-da-wane kewaye sauti shine Virtual Surround, wanda kuma ake kira Simulated Surround.Mutane suna kiran wannan fasaha mara daidaiton fasahar sauti kewaye.

Tsarin sauti mara daidaituwa na kewaye yana dogara ne akan sitiriyo tashoshi biyu ba tare da ƙara tashoshi da masu magana ba.Ana sarrafa siginar filin sauti ta hanyar kewayawa sannan a watsa shi, ta yadda mai sauraro zai ji cewa sautin yana fitowa daga wurare da yawa kuma ya samar da filin sitiriyo da aka kwaikwayi.Ƙimar sautin kewayawa mai kama-da-wane Ƙimar fasahar kewayawa mai kama da ita ita ce amfani da lasifika biyu don kwaikwayi tasirin sautin kewaye.Ko da yake ba za a iya kwatanta shi da ainihin gidan wasan kwaikwayo na gida ba, tasirin yana da kyau a mafi kyawun sauraron sauraro.Rashin lahanta shi ne cewa bai dace da sauraro gaba ɗaya ba.Bukatun matsayi na sauti suna da girma, don haka yin amfani da wannan fasaha na kewaye da ita zuwa belun kunne zaɓi ne mai kyau.

A cikin 'yan shekarun nan, mutane sun fara nazarin amfani da ƙananan tashoshi da ƙananan masu magana don ƙirƙirar sauti mai girma uku.Wannan tasirin sauti baya da gaske kamar balagaggen fasahar sauti na kewaye kamar DOLBY.Koyaya, saboda ƙarancin farashinsa, ana ƙara amfani da wannan fasaha a cikin amplifiers, talabijin, sautin mota da multimedia AV.Wannan fasaha ita ake kira fasahar sauti mara misaltuwa.Tsarin sauti mara daidaituwa na kewaye yana dogara ne akan sitiriyo tashoshi biyu ba tare da ƙara tashoshi da masu magana ba.Ana sarrafa siginar filin sauti ta hanyar kewayawa sannan a watsa shi, ta yadda mai sauraro zai ji cewa sautin yana fitowa daga wurare da yawa kuma ya samar da filin sitiriyo da aka kwaikwayi.

Ka'idodin Sauti na Kewaye Mai Kyau Makullin gane kama-da-wane Dolby Surround Sound shine sarrafa sauti na kama-da-wane.Ya ƙware wajen sarrafa tashoshin sauti da ke kewaye da su dangane da acoustics physiological na ɗan adam da ka'idodin psychoacoustic, yana haifar da tunanin cewa kewayen sautin sauti yana zuwa daga baya ko gefen mai sauraro.Ana amfani da tasiri da yawa bisa ka'idodin jin ɗan adam.Tasirin binaural.Masanin kimiyyar lissafi dan Burtaniya Rayleigh ya gano ta hanyar gwaje-gwaje a cikin 1896 cewa kunnuwa biyu na ɗan adam suna da bambance-bambancen lokaci (0.44-0.5 microseconds), bambance-bambancen ƙarfin sauti da bambance-bambancen lokaci don sautunan kai tsaye daga tushen sauti ɗaya.Za'a iya tantance yanayin ji na kunnen ɗan adam bisa waɗannan ƙananan bambance-bambancen na iya ƙayyade ainihin inda sautin yake da kuma tantance wurin da sautin yake, amma ana iya iyakance shi kawai don tantance tushen sautin a cikin madaidaiciyar shugabanci a gaba. , kuma ba zai iya warware matsayar tushen sautin sarari mai girma uku ba.

Tasirin Auricular.Muryar ɗan adam tana taka muhimmiyar rawa wajen nuna raƙuman sauti da kuma jagorancin tushen sauti na sarari.Ta hanyar wannan tasirin, ana iya ƙayyade matsayi mai girma uku na tushen sauti.Yawan tace tasirin kunnen mutum.Na'urar tantance sauti na kunnen ɗan adam yana da alaƙa da mitar sauti.Bass na 20-200 Hz yana samuwa ta hanyar bambance-bambancen lokaci, tsakiyar kewayon 300-4000 Hz yana samuwa ta bambancin ƙarfin sauti, kuma treble yana samuwa ta bambancin lokaci.Bisa ga wannan ka'ida, ana iya nazarin bambance-bambancen harshe da sautunan kiɗa a cikin sautin da aka sake kunnawa, kuma ana iya amfani da jiyya daban-daban don ƙara fahimtar kewaye.Aikin canja wuri mai alaka da kai.Tsarin sauraron ɗan adam yana samar da nau'i daban-daban don sautuna daga wurare daban-daban, kuma ana iya kwatanta wannan sifa ta hanyar aikin canja wuri mai alaka (HRT).A taƙaice, wurin zama na kunnen ɗan adam ya haɗa da kwatance guda uku: a kwance, a tsaye, da gaba da baya.

Matsayin tsaye yana dogara ne akan kunnuwa, matsayi na tsaye ya dogara ne akan harsashi na kunne, kuma matsayi na gaba da na baya da kuma fahimtar filin sauti na kewaye ya dogara da aikin HRTF.Dangane da waɗannan tasirin, Dolby kama-da-wane da ke kewaye ta hanyar wucin gadi yana ƙirƙirar yanayin yanayin sauti iri ɗaya kamar ainihin tushen sauti a kunnen ɗan adam, yana ƙyale kwakwalwar ɗan adam ta samar da daidaitattun hotunan sauti a cikin daidaitaccen yanayin sararin samaniya.