一, Qonda umahluko phakathi kwePPI kunye ne-PA
Xa ukhetha isiponji abicah, sihlala sidibana parameters ezimbini PPI kunye PA. I-PPI, okanye inani lemingxuma nge-intshi nganye, iyunithi yokulinganisa ingxinano yemingxuma kwisipontshi, ngelixa i-PA (PASCAL) iyunithi yokulinganisa uxinzelelo. Ezi zimbini zibonisa iimpawu ezahlukeneyo. I-PPI ichaza iimpawu zesakhiwo sesiponji se-silicone, ngelixa i-PA ichaza ukusebenza kwesiponji se-silicone kwinkalo ethile, njengokumelana noxinzelelo. Xa ukhetha isiponji se-silicone, i-PPI ifanelekile ngakumbi njengesalathisi sokulinganisa. Ngenxa yokuba i-PPI ephezulu ithetha ukuba i-pores yesiponji se-silicone ixinene, ngokuqhelekileyo inokubonelela ngesandi esingcono sokufunxa kunye nemiphumo yokugcina ubushushu.
Nangona kunjalo, i-PA, njengeyunithi yoxinzelelo, ayiqinisekisi ngokuthe ngqo umgangatho kunye nokusebenza kwesiponji se-silicone. Isetyenziswa rhoqo kwiimeko ezithile zesicelo, njengaxa ulinganisa amandla oxinzelelo lwesiponji sesilicone.
2,Ukuthelekisa phakathi kwe-40ppi kunye ne-60ppi
Xa siqwalasela i-PPI yesiponji se-silicone, sihlala sithandabuza phakathi kwe-40ppi kunye ne-60ppi. Umahluko ophambili phakathi kwezi zibini zilele kubuninzi bemingxuma kunye neempawu ezibonakalayo ezibangelwayo.
1. I-sponge ye-silicone ye-40ppi inemingxuma emikhulu kunye ne-air permeability engcono, eyenza ilungele ukusetyenziswa kwiindawo ezifuna ukusebenza okuphezulu komoya. Ngaphezu koko, imingxunya emikhulu ikwathetha ukuba olu hlobo lwesiponji kulula ukulucoca kwaye alunakwenzeka ukuba luqokelele uthuli.
2.Ngokwahlukileyo, i-60ppi isiponji se-silicone sinemingxuma e-denser, eyenza ukuba yenze ngcono ngokubhekiselele kwi-sound insulation kunye nokugcinwa kobushushu. Nangona kunjalo, imingxunya exineneyo inokukhokelela ekungeneni komoya omdaka kwaye yenze kube nzima ngakumbi ukucoca.
Xa usenza ukhetho, ukuba uhlawula ingqalelo ngakumbi ekuphefumuleni kunye nokucoca lula, isiponji se-silicone ye-40ppi iya kuba yinto engcono. Ukuba ukufakwa kwesandi kunye nemiphumo yokugcinwa kobushushu kugxininiswa ngakumbi, i-60ppi isiponji se-silicone iya kufaneleka ngakumbi.
Isiphelo:
Ukhetho apho PPI isiponji abicah ukusebenzisa ikakhulu kuxhomekeke kwiimfuno zakho ezithile. Kwiimeko ezininzi eziqhelekileyo, isiponji se-40ppi sele sanele ukuhlangabezana neemfuno. Nangona kunjalo, ukuba ufuna ukufakwa kwesandi esingcono okanye iziphumo zokugcina ubushushu, isiponji se-60ppi sifanelekile. Xa ukhetha, umntu unokuphinda athathele ingqalelo iimeko ezithile zesicelo kunye nezinye iiparitha zesiponji, njengobunzima, ubunzima, kunye noluhlu lokumelana nobushushu, ukuqwalaselwa ngokubanzi.
Ngokubhekiselele kwiparameter PA, ayisetyenziswa ngokubanzi njengesiseko esiphambili sokukhetha ngaphandle kokuba kwiimeko ezithile apho umlinganiselo wokumelana noxinzelelo kufuneka.