Would wearing foam earplugs (NRR of 29), along with Rifleman (for gun range) over-the-ear headphones, be sufficient protection for mowing the lawn with a riding mower? It takes about 40 minutes in total. The Rifleman headphones seem to block out more noise than the John Deere ones I got when I purchased the mower. They are not noise-canceling, though.
Based on the dB meter on my iPhone, the mower noise is less than 90 dB, more like mid-80s. I don't feel the sound is uncomfortable using this combo. In comparison, in the past, I would only use foam earplugs at rock concerts, and that was fine.
Also, are anti-vibration gloves really needed? Do they do anything to protect your ears/hearing?