Uluhlu lwesithethi somgca Intshayelelo:
Isithethi soluhlu lwemigca Sikwabizwa ngokuba zizithethi ezidibeneyo.Izithethi ezininzi zinokudityaniswa zibe liqela lesithethi kunye ne-amplitude efanayo kunye nesigaba (uluhlu lomgca), kwaye isithethi sibizwa ngokuba sisithethi soluhlu lwelayini.Iisistim zoluhlu lwemigca zihlala zigoba kancinane ukuphumeza i-engile yokugquma enkulu.Inxalenye ephambili idibanisa intsimi ekude kunye nenxalenye egobileyo kwindawo ekufutshane.Yenza i-asymmetry ye-directivity ethe nkqo, amandla athile e-acoustic anokuqokelelwa kwinxalenye kunye nokungonelanga okuphezulu.

Umgca woluhlu lwesithethi Umgaqo:
Uluhlu olunemigcaliqela leeyunithi zemitha ezilungelelaniswe ngokwemigca ethe tye kwaye zibekwe ngokusondeleleneyo, kwaye zine-amplitude kunye nesigaba esifanayo.Phucula umgama wothumelo kwaye unciphise ukuthotywa ngexesha lokuhanjiswa kwesandi.Ingqikelelo yoluhlu lomgca ayikho kuphela namhlanje.Yayicetywa kuqala nguHF Olson, ingcaphephe edumileyo yaseMelika.Kwi-1957, uMnu.Olsen wapapasha i-classical acoustic monograph "i-Acoustic Engineering" (i-AcousticEngineering), eyayixubusha ukuba i-linear arrays ifaneleka ngokukodwa kwi-radiation acoustic ekude.Oku kungenxa yokuba ii-arrays zomgca zibonelela ngolungelelwaniso olululo oluthe nkqo kwiziphumo zesandi ezilungileyo.
Uluhlu lwemigca thethar izicelo:
Ingasetyenziselwa ukusetyenziswa kweselula okanye ukufakela okusisigxina.Iyakwazi ukupakishwa okanye ixhonywe.Inoluhlu olubanzi lwezinto ezisetyenziswayo, ezifana nemidlalo yokukhenketha, iikonsathi, iithiyetha, izindlu zeopera, njalo njalo.Ingasetyenziselwa ukusetyenziswa kweselula okanye ukufakela okusisigxina.Uluhlu lwesithethi somgca Iplani ethe nkqo ye-axis ephambili yintsimbi emxinwa, kwaye i-superposition yamandla inokukhanya kwimigama emide.