Hearing aids are essentially mini computers with a lot of technology packed onto a chip housed inside the casing. Any extreme swing of temperate and/or humidity can have an effect on the components of a hearing aid. Hearing aids are comprised of a chip, microphone, speakers, a receiver, a battery and sometimes rubber tubing. Changes in humidity can cause rubber tubing to become hard, brittle and even crack. If the integrity of the tubing changes, the individual is not hearing the sound quality that they were intended to hear because the tube in which the sound passes through is compromised.
Electronics are also subject to negative effects when temperatures change. Electronics tend to run slower when the temperature is too high or too low. Too much humidity in the environment can cause moisture to build up on the hearing aid and the components causing the electronics to malfunction and corrode. The best way to combat those environmental changes is to store the hearing aids in a hearing aid dry box when not in use and to keep the batteries out of extreme cold or hot temperatures. By maintaining proper conditions of the hearing aid and the components, the lifespan of the electronics will be much longer than devices that have been subjected to more harsh conditions.