Kwizixhobo zomsindo, uvakalelo lwesixhobo sesithethi sibizwa ngokuba kukukwazi ukuguqula umbane kwisandi okanye isandi kumbane.

Nangona kunjalo, inqanaba lovakalelo kwiinkqubo zeaudio zasekhaya alinxulumananga ngokuthe ngqo okanye liphenjelelwa ngumgangatho wesandi.

Akunakucingelwa ngokulula okanye ngokugqithisileyo ukuba okukhona uvakalelo oluphezulu lwesithethi, kokukhona umgangatho wesandi ungcono.Kakade ke, ayinakuphikiswa ngokuthe ngqo ukuba isithethi esinovakalelo oluphantsi kufuneka sibe nesandi esiphantsi.Uvakalelo lwesithethi ludla ngokuthatha i-1 (watt, W) njengamandla ophawu lwegalelo.Beka imakrofoni yokuvavanya imitha ye-1 ngqo phambi kwesithethi, kunye nesithethi esipheleleyo seendlela ezimbini, faka imakrofoni phakathi kweeyunithi ezimbini zesithethi.Umqondiso wegalelo ngumqondiso wengxolo, kwaye inqanaba loxinzelelo lwesandi olulinganisiweyo ngeli xesha luvakalelo lwesithethi.

Isithethi esine-wide frequency response sinamandla anamandla okuvakalisa, uvakalelo oluphezulu lwenza kube lula ukuvakala, amandla aphakamileyo enza ukuba izinzile kwaye ikhuseleke, kunye neengqungquthela ezilungeleleneyo kunye noqhagamshelwano lwesigaba esifanelekileyo nesifanelekileyo, esingayi kubangela ukuphazamiseka ngenxa yokusetyenziswa kwamandla angaphakathi.Ngoko ke, iyakwazi ukuvelisa ngenene nangendalo izandi ezahlukahlukeneyo, yaye isandi sinengqiqo eyomeleleyo yemigangatho, ukwahlula okulungileyo, ukuqaqamba, ukucaca nokuthamba.Isithethi esinovakalelo oluphezulu kunye namandla aphezulu akulula nje ukuvakala, kodwa okona kubaluleke kakhulu, inqanaba eliphezulu loxinzelelo lwesandi ngaphakathi kwinqanaba elizinzileyo nelikhuselekileyo linokuthi "ligqithise isihlwele", kwaye inqanaba loxinzelelo lwesandi elifunekayo lingafumaneka ngaphandle kokufuna kwakhona. amandla amaninzi okuqhuba.

Kukho ezininzi iibrendi ezaziwayo zezithethi eziphezulu ezithembekileyo kwiimarike, kodwa uvakalelo lwabo aluphezulu (phakathi kwe-84 kunye ne-88 dB), kuba ukwanda kobuzwe kuza kwiindleko zokunyusa ukuphazamiseka.

Ke njengesithethi sokuthembeka okuphezulu, ukuze kuqinisekiswe inqanaba lokuzala kwesandi kunye nekhono lokuvelisa, kuyafuneka ukunciphisa iimfuno zobuntununtunu.Ngale ndlela, isandi sinokulungelelaniswa ngokwemvelo.

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Ngaba ukuphakama kovakalelo lwenkqubo yesandi, kungcono, okanye kungcono ukuba ngaphantsi?

Okukhona uvakalelo luphezulu, kokukhona lungcono.Okukhona uvakalelo lwesithethi luphezulu, kokukhona inqanaba loxinzelelo lwesandi liphezulu kwisithethi phantsi kwamandla afanayo, kwaye kokukhona isandi esiphuma phezulu sikhutshwa sisithethi.Inqanaba loxinzelelo lwesandi oluveliswe sisixhobo kwindawo ethile kwinqanaba elithile lokufaka (amandla).Inqanaba loxinzelelo lwesandi=10 * amandla elogi+uvakalelo.

Ngokusisiseko, ngokuphindwe kabini kwinqanaba loxinzelelo lwesandi, inqanaba loxinzelelo lwesandi liyenyuka nge-1dB, kodwa kuyo yonke i-1dB yokwanda kovakalelo, inqanaba loxinzelelo lwesandi linganyuka nge-1dB.Ukusuka koku, ukubaluleka kovakalelo kunokubonwa.Kushishino lweaudio yobuchwephesha, i-87dB (2.83V/1m) ithathwa njengeparamitha enesiphelo esisezantsi kwaye ngokubanzi iyeyezithethi ezinobungakanani obuncinci (5 intshi).Uvakalelo lwezithethi ezingcono ziyakudlula i-90dB, kwaye ezinye zinokufikelela ngaphezulu kwe-110. Xa sithetha ngokubanzi, ubukhulu besayizi yesithethi, kokukhona buphezulu ubuntununtunu.

Iindlela ezimbini zeSithethi esiPheleleyo