Iyo inotonhodza shongwe yekudzivirira inodzivirira inogona zvakare kunzi: inotonhorera shongwe yekuvharisa sikirini, inotonhorera shongwe yekunyura mundiro, inotonhorera shongwe yekunyura sikirini, inotonhorera shongwe yekuvharisa ruzha, nezvimwewo. Inzwi rekupinza mutsindo, uye zvikamu zvinotevera ndiwo mayunitsi ekudzivirira ruzha.Mushure mekuona zvine mutsindo kureba uye kureba kwechivharidzo chekurira, kuderedzwa kweruzha kwe10-25dB (A) kunogona kuwanikwa.