The ER-9 Musician Filters have a reduced diaphragm stiffness for less attenuation (reduction). These filters earplugs are most commonly used by small or large string performers, vocalists or acoustical guitar performers.
- Reduced attenuation (better audibility) than the ER-15
- For use when a small amount of protection is adequate
- Good frequency response
- 9dB attenuation through 2 kHz
- Compact style