Modern hearing aids are engineered to withstand moisture exposure, though the term “waterproof” is often a simplification. Many devices are highly water-resistant and designed to survive daily moisture challenges. This advanced protection uses specialized casings, water-repelling coatings on components, and seamless seals to keep the delicate electronics dry. The industry uses a standardized technical rating system to communicate the exact level of protection against solid particles and liquids.
Understanding Water Protection Ratings
The level of protection a hearing aid has against environmental intrusion is defined by its Ingress Protection (IP) rating, a standard created by the International Electrotechnical Commission (IEC). This rating uses the letters “IP” followed by two digits, each specifying a different type of resistance. The first digit indicates protection against solid particles, such as dust and dirt, on a scale from 0 to 6.
The second digit rates resistance to liquids on a scale from 0 to 9 and is the most relevant for water protection. A higher number in either position indicates a greater degree of protection. Most high-end hearing aids carry a rating of IP67 or IP68, signifying the highest level of dust protection and significant water resistance.
An IP67 rating means the device is completely dust-tight (“6”) and can handle temporary immersion in water up to 1 meter (about 3 feet) for a maximum of 30 minutes (“7”). This resistance is sufficient for surviving accidental drops into a shallow sink or brief exposure to heavy rain. The highest rating commonly found is IP68, where the “8” signifies protection against continuous immersion beyond 1 meter. The specific depth and duration for IP68 are defined by the manufacturer, making it the most durable option for moisture exposure.
Real-World Use and Activity Limitations
Translating the technical IP rating into daily life sets realistic expectations for device use. Hearing aids with high ratings like IP67 or IP68 are designed to handle common moisture exposure, such as heavy perspiration during exercise, accidental splashes, or sudden rain. The internal components are protected enough to manage these brief encounters with water.
Despite high IP ratings, manufacturers generally do not recommend wearing hearing aids during activities that involve prolonged or deep water exposure. This includes swimming, bathing, or showering, as the device is not designed to withstand continuous submersion, even with an IP68 rating. The high pressure or extended duration of water exposure in these scenarios can overwhelm the seals and coatings.
Specific liquid types also pose a risk beyond pure water. Saltwater and chlorinated pool water are more corrosive than fresh water, and soap residue from showering can degrade the protective seals on the casing over time. Therefore, even if a device can technically handle a brief drop in a pool, repeated or prolonged exposure to these harsher liquids can accelerate damage. The water resistance is intended as a safeguard against accidents and daily wear, not as permission for water-based recreation.
Essential Maintenance After Moisture Exposure
Regardless of the IP rating, immediate and proper maintenance is necessary after any significant moisture exposure, such as heavy sweat or accidental soaking. The first step is to turn the device off immediately. If using disposable batteries, remove them, as water can cause a short circuit; rechargeable devices should simply be powered down.
Next, gently wipe the entire hearing aid with a soft, dry cloth to remove any visible moisture on the surface. It is crucial to leave the battery door open overnight to allow any trapped internal moisture to evaporate naturally. Never attempt to use high heat sources like a hairdryer or microwave, as this will melt or distort the delicate internal components beyond repair.
For a more thorough drying process, specialized tools are recommended. Placing the hearing aids in a hearing aid dehumidifier or drying kit overnight is the most effective method. These devices use a desiccant or gentle warm air to draw out accumulated moisture. Consistent use of a drying kit, especially in humid climates or after active use, helps prolong the lifespan and optimal function of the device.