As mentioned, sonus complete in some cases are simple and easily treated while others are not so easy to correct. The loss of hearing can be mild or severe, and temporary or permanent, depending on the cause. Most illnesses temporarily induce hearing impairment while some rare ones can permanently take away a person's hearing completely.sonus complete Not Hearing Decline First the ability to distinguish high-pitched sounds is affected, causing speech to become unclear or muffled. Therefore, this hearing impairment occurs in not only the outer and/or middle ear but also the inner ear and/or hearing nerve. Everybody needs conversation because a normal conversation can make us laugh, elevate a mood, relive family experiences, and generally make our day.