Lifestyle Changes
There are different changes in your lifestyle that might require an upgrade to your hearing aids.
A new job, for instance, can be one of them. If your new occupation involves participating in meetings or conference calls, or is in an especially noisy environment, a new model suited to these conditions might be in order.
Taking up a new sport is another example, as it may require waterproof hearing aids due to the excessive amount of moisture that tends to build up because of physical activity.