Yes, and also a relative scale like percentages are. A change of 87% is about nine decibels. If earplugs need to be 30+ decibels that makes me wonder if nine de

Yes, and also a relative scale like percentages are. A change of 87% is about nine decibels. If earplugs need to be 30+ decibels that makes me wonder if nine decibels is enough to have a significant impact (but another comment suggests it does)