How do you type a minus sign if your keyboard does not have one? A couple ways: - use the hyphen key (above P and to the right on a QWERTY board) - open the character map and copy and paste-use your system's method for entering Unic â¦ ode and enter 002D.or Windows operating systems, ensure the number lock is on, hold down the Alt key and using the numeric keypad type in 0178. The symbol 2 will appear in your document at the cursor position. Alternatively, use the 'Insert' menu heading and find symbols.
At present there are no preventative measures known; treatment is by hearing aid or surgical implant. Presbycusis is the most common cause of hearing loss, afflicting one out of three persons by age 65, and one out of two by age 75. Presbycusis is the second most common illness next to arthritis in aged people.
Auditory Brain Stem Response (ABR) Test: This test is used to evaluate the auditory brain stem (the part of the nerve that carries sound from the ear to the brain) and the brainâs response to sound. During this test, miniature earphones are placed in the ear and sounds are played. Band-Aid-like electrodes are placed along the babyâs head to detect the brainâs response to the sounds. If the babyâs brain does not respond consistently to the sounds, there may be a hearing problem.