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.
Age-related hearing loss, known as presbycusis, affects most older adults to some degree. The most frequent cause of age-related hearing loss is the natural breakdown of nerve cells in the inner ear.Sound reaches the inner ear, but the breakdown of nerve cells prevents proper hearing.This is known as sensorineural hearing loss.here is no known way to reverse age-related hearing loss. But if you have age-related hearing loss, there are devices that can help you hear and communicate more easily, including hearing aids, telephone amplifiers, pagers, and email.