and Test Tones
Average price : less than $10 for a box (7 pairs).
NRR stands for Noise Reduction Rating. It is a standardized measure expressed in decibels (dB), and represents the overall attenuation offered by the earplug. The higher the NRR, the stronger the attenuation. Differences in the NRR of less than 3 dB between earplugs have no importance in practice.
ΔF represents an important factor for musical applications, as it measures the standard deviation from a spectrally flat attenuation between 60Hz and 16kHz. The smaller the ΔF, the higher the fidelity. ±3dB is virtually inaudible and can be considered as the very best one can get.
|At Home||•••||Great all-around earplug. Some users like the comfort offered by wax.|
|On the go||••||Efficient but more difficult to handle than foam earplugs.|
|Industry||•||Difficult to handle in an industrial environment.|
|Music||•||Rather flat frequency-wise, but attenuation is too strong.|
Alternative : foam earplugs are nearly as efficient but easier to handle and exert less pressure in the ear canal.