Many of us have had the experience of following along with a joke and not hearing the punch line correctly. Or, to be watching a television show only to realize that unless you can see the actor's faces, you cannot follow the story. You might be in a kitchen with the family and if the dishwasher is turned on, you are pretty much turned off. As we age there is a loss of hearing from a variety of factors. You may have worked in a noisy environment and have some damage to your ears.
Some people have a genetic hearing loss.
Others may have a condition that is medically treatable but have yet to let anyone know they are having difficulty. There are a multitude of causes and just as many ways to make communication easier. Between them, they have had 33 years of experience working with people who are dealing with hearing loss. They know that hearing loss is a very isolating disability. They have seen it force people to avoid scenarios because they know that they will not be able to follow the conversation and ultimately, feel stupid.