Ear canals come in different sizes and shapes, affecting both fit and protection levels, as well as comfort. Bigger variety will go far in providing a better fit for more ears, and protecting significantly more of workers.
Here is an ANSAC Guide on ‘Earplug Selection Tips.
1. Shape
Ear canal openings may appear round, oval or as a split. For oval or slit openings, round reusable earplugs will often not fil the ear canal-try a foam earplug.
2. Size
If an earplug is too large or too small it will never achieve an acoustic seal.
3. Ease of Insertion
Some workers have difficulty rolling or inserting foam earplugs due to restricted dexterity or arthritis, or because they are wearing gloves. Try a no-roll foam or reusable earplug.
4. Others Factors
Corded/Uncorded
Uniform attenuation across frequencies
Single-use or reusable
Push-in foam
Detectable earplugs (for food service industry)