European Standard · Hearing Protection
EN 458 – Hearing Protectors: Selection, Use, Care and Maintenance Guidance
EN 458 is the European standard providing recommendations for the selection, use, care and maintenance of hearing protectors, complementing the product performance requirements set out in EN 352 for the hearing protectors themselves.
1. Scope
EN 458 provides guidance rather than product certification requirements, helping employers and workers select appropriate hearing protectors based on workplace noise levels, calculate effective attenuation, and establish good practices for fitting, wearing time and maintenance.
2. Exclusions & Related Standards
- Complements the product requirements of EN 352, which specifies hearing protector performance and testing.
- Used alongside workplace noise assessments conducted under occupational noise exposure regulations.
- Relevant when combining hearing protection with head protection meeting EN 397 or eye protection meeting EN 166.
3. Key Requirements & Marking
The standard provides methods for estimating effective noise attenuation in real workplace conditions (accounting for real-world performance being lower than laboratory-rated attenuation), guidance on selecting protectors to avoid both under-protection and over-protection, and recommendations for wear-time and hygiene practices.
4. Testing Overview
As a guidance standard, EN 458 does not itself involve product testing; instead it references attenuation data obtained through EN 352 product testing and provides calculation methods to translate that data into expected real-world protection levels.
5. Selection Guide
Use workplace noise measurements combined with the hearing protector’s labelled attenuation data to estimate the effective noise level reaching the ear, aiming for adequate protection without excessive over-attenuation that could isolate workers from important warning sounds or communication.
6. Inspection, Care and Maintenance
- Follow the specific care instructions for the hearing protector type in use (earplugs, earmuffs or electronic protectors)
- Replace foam or disposable earplugs regularly and never reuse single-use plugs between different workers
- Clean reusable earmuffs and replace cushions or foam liners according to manufacturer schedules
- Ensure hearing protectors are worn for the full duration of noise exposure, since even short unprotected periods significantly reduce overall effective protection
7. Frequently Asked Questions
What is the difference between EN 458 and EN 352?
EN 352 specifies the performance and testing requirements for hearing protector products, while EN 458 provides guidance on selecting, using and maintaining those products effectively in the workplace.
Can hearing protectors provide too much protection?
Yes, over-protection can isolate workers from important warning signals and communication, so EN 458 encourages selecting protection that adequately but not excessively reduces noise exposure.
Why does real-world hearing protection differ from labelled attenuation?
Laboratory-rated attenuation values are typically achieved under ideal fitting conditions, while real-world use often involves imperfect fit, so EN 458 provides methods to estimate more realistic effective protection.
How often should hearing protection be worn during noisy tasks?
It should be worn for the entire duration of noise exposure, since even brief unprotected periods can substantially reduce the overall daily protection achieved.
Does EN 458 apply to a specific hearing protector product?
No, EN 458 is a guidance document for selection and use practices rather than a certification standard for a specific product.