We've had a lot of windy days recently, and the math geek in me got thinking about how far sound carries in the wind and how that might affect my coyote calling success.
We all know that scouting and knowing where/when coyotes may be around is a critical factor, and we can improve success on windy days by heading into areas of thick cover/lee side of hills etc. These areas are not only sheltered from some of the wind, so the call sound might travel a little further, but are also more likely to be holding the coyotes who are dozing out of the wind.
Getting back to my math musings, it seems pretty basic that if no coyote can hear my call I'm not going to call any in. Sound will travel differently downwind vs. upwind and in hilly vs. level terrain, open country vs. woods, etc. but (because I'm really not that smart) I assumed all other variables are equal and the sound radiates out from the caller in a perfect circle. If on a calm day the sound of the call might be heard by coyotes up to 750m away (which I think is a reasonable estimate) and I use that as the radius of the area I could draw coyotes in from, that means I'm reaching approximately 1.77 sq. km. As the wind picks up the distance the call may be heard would begin to diminish - if a moderate wind reduced the radius my call is reaching to 500m, the area of effect drops to 0.79 sq. km so that 1/3 decrease in sound travel distance means the area I'm hunting is essentially cut to less than half. If a stronger wind reduced the effective calling range to 250m, the area is further reduced to 0.20 sq. km - just 12% of the area being covered on a calm day! Even if my distance estimates are a little off, it's still easy to see the odds get stacked against us very quickly as the wind increases.
Just some food for thought that will have me banking some time in my home office, watching for those calm days in the forecast.
We all know that scouting and knowing where/when coyotes may be around is a critical factor, and we can improve success on windy days by heading into areas of thick cover/lee side of hills etc. These areas are not only sheltered from some of the wind, so the call sound might travel a little further, but are also more likely to be holding the coyotes who are dozing out of the wind.
Getting back to my math musings, it seems pretty basic that if no coyote can hear my call I'm not going to call any in. Sound will travel differently downwind vs. upwind and in hilly vs. level terrain, open country vs. woods, etc. but (because I'm really not that smart) I assumed all other variables are equal and the sound radiates out from the caller in a perfect circle. If on a calm day the sound of the call might be heard by coyotes up to 750m away (which I think is a reasonable estimate) and I use that as the radius of the area I could draw coyotes in from, that means I'm reaching approximately 1.77 sq. km. As the wind picks up the distance the call may be heard would begin to diminish - if a moderate wind reduced the radius my call is reaching to 500m, the area of effect drops to 0.79 sq. km so that 1/3 decrease in sound travel distance means the area I'm hunting is essentially cut to less than half. If a stronger wind reduced the effective calling range to 250m, the area is further reduced to 0.20 sq. km - just 12% of the area being covered on a calm day! Even if my distance estimates are a little off, it's still easy to see the odds get stacked against us very quickly as the wind increases.
Just some food for thought that will have me banking some time in my home office, watching for those calm days in the forecast.