Isticmaalka mabda'a cabbiraadda heerkulka mawjada acoustic ee dusha sare, macluumaadka heerkulka galay qaybaha calaamadaha soo noqnoqda hirarka korantada. Dareemka heerkulka ayaa si toos ah loogu rakibay dusha qaybaha heerkulka shayga la qiyaasay, waxay mas'uul ka tahay helitaanka signalka soo noqnoqda raadiyaha, oo ku soo celi signalka raadiyaha xogta heerkulka ururiyaha, marka heerkulka heerkulka uu si caadi ah u shaqeeyo, uma baahna awood dibadda ah. sahayda sida baytari, CT loop korontada. Gudbinta goobta calaamadda ee u dhaxaysa dareeraha heerkulka iyo heerkulka ururiyaha waxaa lagu gartaa hirarka korantada ee wireless-ka.