Ringing in the ears and tinnitus are terms used to describe the sensation of hearing ringing, buzzing clicking, or hissing that seems to come from inside the ear or head rather than from an outside sound source. Severe tinnitus may cause difficulty hearing, concentrating and sleeping. Exposure to noise may exacerbate or bring on symptoms in some cases. Additionally an audiologist may be helpful in determining how to implement tinnitus management strategies at work, or may be able to fit affected individuals with tinnitus masking equipment. If an individual is using any wearable assistive device fitted by an audiologist and needs to reduce noise exposure due to tinnitus, input from an audiologist may be helpful and in some cases necessary to determine what type of hearing/noise protection would be appropriate.