Why not just replace the otoplastics after 5 years?

Question

Accepted Answer

Applying a standard replacement period (e.g. every 5 years) for otoplastics is neither the safest nor the most cost-effective strategy.
This is because the outer ear changes in a unique way and at a unique speed for each individual. As a result, the actual lifespan of otoplastics varies greatly from person to person.
The risks of a fixed replacement period are twofold:
Risk of hearing damage (false sense of security): In some users, the ear canal changes more quickly, which means that otoplastics can start to leak after only two years, for example. If they are not replaced until after five years, the employee will have been walking around with a false sense of security for three years, which can lead to irreversible hearing damage.Unnecessary costs (waste): For other users, the fit remains good for much longer (e.g. 8 years). If these otoplastics are discarded preventively after 5 years, the company incurs unnecessary costs for replacement that was not yet necessary.
What is the best alternative to a fixed replacement?
Instead of blindly relying on a calendar year, annual checks are the gold standard.
Annual leak test: By testing earplugs for leaks every year, you can be sure that they still provide adequate protection. Leaky earplugs are replaced immediately, while earplugs that are still in good condition remain in use.Maintenance and dialogue: A maintenance appointment provides an important opportunity for contact between the specialist and the wearer. Any complaints, comfort or hygiene issues can be resolved immediately. The filter and the earplug channel are cleared, eliminating any excessive attenuation. This has a positive impact on wear acceptance.

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The risks of a fixed replacement period are twofold:

What is the best alternative to a fixed replacement?