Izinto okufanele uziqaphele lapho ukhetha izinsiza zokuzwa zabantu abadala

Izinsiza-kuzwa emakethe zihlukaniswe ngezinhlobo ezimbalwa: uhlobo lwebhokisi, ngemuva--kohlobo lwendlebe,{2}}-ohlotsheni lwendlebe, kanye nohlobo lwe-ndlebe.
1. Ibhokisi-izinsiza zokuzwa zibuye zibizwe ngokuthi iphakethe-uhlobo noma uhlobo lwephakethe-. Makhulu kancane kunebhokisi likamentshisi. Umzimba nama-earphone kuxhunywe ngezintambo. Uma isetshenziswa, izindlebe zifakwa endlebeni yangaphandle bese ibhokisi lifakwa ephaketheni lesifuba. Izinzuzo zayo ukuphazanyiswa okuncane, amandla amakhulu, kulula ukuyisebenzisa, kulula ukulungisa, isikhathi eside sokusebenzisa, kanye nenani eliphansi, elingahlangabezana nezidingo zabantu abanenkinga yokungezwa. Kodwa-ke, lolu hlobo lwebhokisi lensiza yokuzwa lizokhipha umsindo wokungqubuzana lapho lifakwa ephaketheni, okuthinta ukucwaswa kolimi. Igqama kakhulu uma igqokwe, ngakho-ke kwesinye isikhathi izwakala ingalungile.
2. Ukubonakala kwengemuva-losizo lokuzwa indlebe iyihhuku egobile engu-3-4 cm ubude. Ibekwa ngemuva kwe-auricle futhi ithumele umsindo endlebeni yendlebe ngehuku lendlebe elimise okwephondo kanye neshubhu lepulasitiki. Izinzuzo zayo azikho izintambo, usayizi omncane, zifihliwe kakhulu, ukuphazamiseka okuncane, futhi zingahlonywa ikhoyili yokungeniswa ukuze kwandiswe umsebenzi wokulalela ifoni. Ukungalungi ukuthi isikhunta esikhethekile sendlebe siyadingeka, okungelula ukujwayela ukusetshenziswa kokuqala futhi akulula ukulungisa.
3. Ezindlebeni{1}}izinsiza-kuzwa ezindlebeni nasezindlebeni ziyizinsiza-kuzwa ezincane ezinobuhle bokuba zincane, zifihlekile, zingabi nacingo{2},asikho isidingo sokwenza isikhunta ezindlebeni, ukuzwa kahle, futhi kungathuthukisa ukuzwa; kodwa akulula ukuzilungisa futhi kuyabiza, futhi adinga ukwenziwa ngendlela oyifisayo ngokuya ngomsele wendlebe womuntu ngamunye kanye nomgodi we-concha. Ngenxa yamandla ayo aphansi, ilungele kuphela ubuthulu obusesilinganisweni futhi ayilungele ukungezwa okunzima nokubi kakhulu.
Lapho ukhetha insiza yokuzwa, kungcono ukuya esibhedlela ukuze uthole ukuhlolwa okuphelele kokuzwa, ukusebenzisa i-audiometry kagesi nezinye izinsimbi ukuze uhlole ngokunembile izinga lokungezwa, bese ukhetha insiza yokuzwa. Uma singekho isibhedlela esinezimo ezihambisanayo endaweni yasendaweni, izinga lokungezwa kanye nokukhethwa kwamandla okusiza ukuzwa kungalinganiselwa ngokuya ngokuhlolwa komlomo. Ngokwesibonelo, abantu abangezwa ukuhlebeza bangasezwa kahle ngama-decibel angu-30 kuya kwangu-40, kanti abantu abangezwa amazwi athambile bangasezwa ama-decibel angaba ngu-40 kuya kwangu-50. Ngalesi sikhathi, kuyatuseka ukuthi uthenge izinsiza zokuzwa{{7}ezinamandla namaphakathi{8}ezimaphakathi; abantu abangakwazi ukuzwa inkulumo evamile baba nezindlebe ezicishe zibe ngama-decibel angu-50 kuya kwangu-60, kanti abantu abangezwa inkulumo ezwakalayo bangasezwa kahle ngama-decibel angu-60 kuya kwangu-70. Bangakhetha izinsiza zokuzwa{14}ezimaphakathi kanye{15}ezinamandla aphezulu; abantu abangakwazi ukuzwa ukumemeza okukhulu baba nokulahlekelwa izindlebe okungama-decibel angu-70 kuya kwangu-80, ngakho-ke bangakhetha izinsiza zokuzwa ezimaphakathi{18}}naphezulu{19}ezinamandla; abantu abangakwazi ukuzwa{20}ukumemeza okunamandla okugcwele balahlekelwa izindlebe cishe ngama-decibel angu-80 kuya kwangu-90 noma ngaphezulu, ngakho-ke bangakhetha{23}amandla aphezulu kanye{24}nezinsiza{25}eziphakeme{25}}eziphezulu zokuzwa.