Do I say,<br/><br/>1 We should lower the volumn of sounds to prevent our hearing impairment.<br/><br/>2 We need to lower the volumn to prevent our hearing impairment.<br/><br/>3 Loud noise from the machines and vehicles cause noise pollution. We need to stay away from the mentioned places.<br/><br/>3 Lower down the volumn from eveything around you that may avoid getting hearing impairment.