Ubusanzwe aho igikorwa cyabereye, iyo abakozi baho batagifashe neza, mikoro ikora ijwi rikaze iyo iri hafi y'indangururamajwi. Iri jwi rikaze ryitwa "howling", cyangwa "feedback gain". Iyi nzira iterwa n'ikimenyetso kinini cy'iyinjizwa rya mikoro, rigahindura ijwi risohoka rigatera urusaku.

Gusubiza ijwi mu ijwi ni ikintu kidasanzwe gikunze kubaho muri sisitemu zo gushimangira amajwi (PA). Ni ikibazo cyihariye cy’amajwi mu buryo bwo gushimangira amajwi. Bishobora kuvugwa ko byangiza imikorere y’amajwi. Abantu bakora amajwi y’umwuga, cyane cyane ababigize umwuga mu kongera ijwi mu buryo bw’ikoranabuhanga, banga cyane ijwi ry’umuziki, kuko ikibazo giterwa no gusohora ijwi kitagira iherezo. Abenshi mu bakozi b’umwuga b’amajwi bagiye bagerageza kugikuraho. Ariko, biragoye gukuraho burundu ijwi ry’umuziki. Gusubiza ijwi mu ijwi ni ikintu giterwa n’igice cy’ingufu z’amajwi zoherezwa muri mikoro binyuze mu kohereza amajwi. Mu gihe cy’amajwi akomeye aho nta ijwi ry’umuziki rihari, ijwi ry’umuziki riragaragara. Muri iki gihe, muri rusange bifatwa nk’aho hari ikintu cy’umuziki. Nyuma yo kugabanya 6dB, bisobanurwa ko nta kintu cy’umuziki kibaho.

Iyo mikoro ikoreshwa mu gufata amajwi muri sisitemu yo kongera amajwi, kuko bidashoboka gufata ingamba zo gutandukanya amajwi hagati y'aho mikoro ifatira n'aho icurangira. Amajwi ava mu ndangururamajwi ashobora kunyura mu mwanya ujya muri mikoro bigatuma ivuza urusaku. Muri rusange, sisitemu yo kongera amajwi ni yo yonyine ifite ikibazo cyo gucura, kandi nta mpamvu yo gucura urusaku na gato muri sisitemu yo gufata amajwi no kuyasubiza. Urugero, hari indangururamajwi zo mu icungamutungo gusa muri sisitemu yo gufata amajwi, aho mikoro ikoreshwa muri studio yo gufata amajwi n'aho icurangira indangururamajwi zo mu icungamutungo ziba zitandukanyijwe, kandi nta mpamvu yo gutanga amajwi. Muri sisitemu yo kongera amajwi ya filime, mikoro ntabwo ikoreshwa, nubwo iyo ukoresheje mikoro, ikoreshwa no mu gufata amajwi hafi mu cyumba cyo kwerekana amajwi. Indangururamajwi zo mu icungamutungo ziba kure ya mikoro, bityo nta mpamvu yo gucura urusaku.

Impamvu zishoboka zo kurira:

1. Koresha mikoro n'indangururamajwi icyarimwe;

2. Ijwi riva mu ndangururamajwi rishobora koherezwa muri mikoro binyuze muri icyo kibanza;

3. Ingufu z'ijwi zitangwa n'indangururamajwi ni nini bihagije, kandi ubushobozi bwo gufata mikoro buri hejuru bihagije.

Iyo ikibazo cyo gucuranga kibaye, ingano ya mikoro ntishobora guhindurwa cyane. Gucuranga bizaba bikomeye cyane nyuma yo kuzamuka, bizatera ingaruka mbi cyane ku mikorere y'amajwi, cyangwa gucuranga amajwi bibaho nyuma yuko mikoro ifunguye cyane (ni ukuvuga iyo mikoro ifunguye. Ijwi ry'inyuma ry'amajwi ya mikoro ku gice cy'ingenzi cyo gucuranga), ijwi rigira ibyiyumvo byo kuzura, bigasenya ubwiza bw'amajwi; Mu bihe bikomeye, indangururamajwi cyangwa amplifier y'amashanyarazi izatwikwa bitewe n'ibimenyetso byinshi, bigatuma imikorere idashobora gukomeza uko bisanzwe, bigatera igihombo gikomeye mu bukungu no gutakaza izina. Ukurikije urwego rw'impanuka z'amajwi, guceceka no gucuranga ni byo impanuka zikomeye, bityo injeniyeri w'indangururamajwi agomba gufata ingamba zikomeye zo kwirinda ikibazo cyo gucuranga kugira ngo arebe ko amajwi arushaho gutera imbere mu buryo busanzwe.

Uburyo bwo kwirinda kurira neza:

Kura mikoro kure y'indangururamajwi;

Gabanya ijwi rya mikoro;

Koresha imiterere y'indangururamajwi na mikoro kugira ngo wirinde aho zireba;

Koresha frequencing shifter;

Koresha equalizer na feedback suppressor;

Koresha indangururamajwi na mikoro mu buryo bushyize mu gaciro.

Ni inshingano z'abakozi b'amajwi kurwanya badacogora bakoresheje amajwi avuza induru. Hamwe n'iterambere rirambye ry'ikoranabuhanga ry'amajwi, hazabaho uburyo bwinshi bwo gukuraho no gukumira amajwi avuza induru. Ariko, mu buryo bw'imitekerereze, ntabwo bishoboka cyane ko sisitemu yo kongera amajwi ikuraho ikibazo cy'amajwi avuza induru na gato, bityo dushobora gufata ingamba zikenewe gusa kugira ngo twirinde amajwi avuza induru mu mikoreshereze isanzwe ya sisitemu.