There was once a couple, married for many years. They were middle-aged. One day the husband after a long debate in his mind, concluded that his wife can not hear so well as in the old days, so he thought she would need a hearing aid. Not sure how to address the problem to his wife, he requested help from the family doctor with who he discussed the problem. The doctor advised him to make a simple test to his wife in order to make a clearer idea of the so called hearing problems.
– This is what you have to do, said the doctor. Stay to about 10 m away from your wife and as if you have a normal conversation speak to her, tell her something and see if she hears. If you do not receive any response then go to 8 m away, then to 5 m and so on until you get an answer.