Calm nerves and quick thinking carried you through two grizzly encounters. You don't want a third. Let them know you're coming by making noise - but without a bell or horn, what works best?

Yodeling is the most effective noise-making method because it's continuous, carries far, and is distinctly human - bears learn to avoid human vocalizations. Whistling (B) can mimic animal sounds. A single shout (C) is too brief and intermittent. Alligator noises (D) are irrelevant and ineffective. Consistent human noise prevents surprise encounters.