There are two basic types of tinnitus, subjective and objective. Subjective tinnitus is the most common and is caused by ear problems in your outer or inner ear or the auditory nerve and the auditory pathways. This tinnitus is only heard by you and it can be heard as a low pitch or a high squeal. Objective tinnitus your doctor is able to hear during an examination. This is a rare type of tinnitus and is typical of a blood vessel, an inner ear bone condition or contractions. You can get started by clicking the link below: http://tinyurl.com/omq426a