Answer:
The 3M 1110 delivers a Single Number Rating (SNR) of 35 dB (H=33 dB, M=33 dB, L=31 dB) and an NRR of 29 dB (CSA Class AL). It accommodates nominal ear canal diameters from 6 mm to 13 mm.
The 3M 1110 corded disposable foam earplugs provide high-level hearing protection rated across international acoustic standards:
- Single Number Rating (SNR): 35 dB (EN 352-2:2020)
- High-frequency (H): 33 dB
- Medium-frequency (M): 33 dB
- Low-frequency (L): 31 dB
- Noise Reduction Rating (NRR): 29 dB (ANSI S3.19-1974 / CSA Class AL)
The slow-recovery polyurethane foam bullet/tapered design expands to fit a nominal ear canal size range of 6 mm (smallest fitted) to 13 mm (largest fitted), making it suitable for moderate to high occupational noise exposures up to 100 dBA TWA.
