Hearing aids can be quite expensive and problems from moisture damage usually occur at some stage during their lifetime. They are body-worn electronic devices that can be exposed to perspiration, body heat and humidity. Hearing aids include a multitude of advanced circuit boards and micro-electronics so are particularly prone to damaging corrosive effects. With good maintenance and removal of accumulated moisture, hearing aids will work better and last longer.
There have been many advances in hearing aid manufacture in recent years, however most hearing aids are not waterproof but are water-resistant meaning they can tolerate only a very small amount of moisture. Hearing aids are classified according to International standards by two “IP” ratings (Ingress Protection rating) depending on resistance to dust and water. The first digit rates the degree of protection against debris, such as dust or sand, and is rated on a scale of 1-7. The second digit rated on a scale from 1-9, indicates how resistant the electrical device is to moisture and can be useful when purchasing hearing aids.