- The Isolator Earbuds have a 25 dB noise reduction rating that protects your hearing against loud noises at the range or on the job. They feature integrated omnidirectional microphones and full dynamic range speakers that deliver crisp, clear sounds. Along with advanced technology, Isolators provide a comfort level above and beyond similar products by incorporating the patented Walkers Secure Fit™ system. Three different-sized contoured fins and foam buds allow for a customized fit.