My experience's have me believe a coyote can pin-point one of many noises that may/do occur @ the same time. That noise, doesn't have to be the loudest. I have no proof other than observations.
One of my Bro's who occasionally stalk/hunts coyotes with me, Winter snowfly. Use to believe a stalker could drown out his noise. During high winds, while stalking in on a coyote. I advised him otherwise. "Don't fool yourself".
I've stalked & crawled up on coyotes in very high, quartering, crosswinds & down-winds. Some made me, from around the 3-500yrds marker. Other's busted me from close to a 1/2 mile away on mildly loud snow cover.
When their bedded down, they have their backside to the wind. Often around here, they bed near the top of a hill or around 1/2 down the hillside. Wind rippin over their backside. They still hear very well, from afar. Especially up & down wind.
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Last Winter, I spotted one sitting on the 1/2 mile fenceline. Snow was mildly loud. This coyote was staring hard @ something, to my right. He never moved. I got to withing 250yrds est. I made some noise going in. Coyote, never looked my way once, until I started in with my Pee-Wee. I was trying to draw him into a low spot for a shot.
Coyote was indifferent & causually walked on over the hill top. No doubt he heard me, stalk in.