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.
How to Read Your Hearing Test. This is the most common type of hearing loss seen in older workers in noisy industries. It is generally due to the effects of too much noise for too many years on the inner ear and related structures.Note that in the lower frequencies, the hearing sensitivity is good enough to give you some vowel information.You will therefore be able to know that someone is talking. However, look at how far below the consonant areas (in the upper right hand portion of the yellow area of the graph) your hearing sensitivity falls.t is generally due to the effects of too much noise for too many years on the inner ear and related structures. Note that in the lower frequencies, the hearing sensitivity is good enough to give you some vowel information. You will therefore be able to know that someone is talking.