One of the owners of a popular game call company keeps telling listeners that ultrasonics don't travel through the atmosphere. As most of you know, we have been using ultrasonic sounds which occur naturally to improve calling success for sometime. Above you will see that ultrasonics do travel just fine as I googled "How far sounds travel from a silent whistle". As you know, almost 100% of sound produced by a silent dog whistle is ultrasonic as we only hear the sound of air passing through the call.
My next question is why would anyone who tells you that ultrasonic sounds are not effective for calling be in the process of trying to bring an e-caller to the market that produces ultrasonic sounds?
Adios,
Gary

Not looking for a debate or discussion because I know I'm not a physicist, but I just happen to remember this physics principle.

Same AI Overview for "ultrasonic sound vs regular sound"

"Compared to regular sound, ultrasonic sound can generally travel a shorter distance due to its higher frequency, meaning it dissipates faster and is more easily absorbed by the environment; however, in specific situations like underwater or when focused into a beam, ultrasonic waves can travel further distances due to their ability to penetrate certain mediums better than audible sound waves."

^^^^^ Yup.
Predators are more attuned to high pitch stuff, squeaks, snapping twigs, etc. Communication is normally lower toned, danger/fighting and pain/fear are higher. Ever hear a scared deer scream? Weird sound.

What we have found is that the ultrasonic sounds tend to broadcast in a wider field while the lower tones tend to be more directional. I think that this ties into what you are quoting about the sound being absorbed by the environment. At any rate, it is safe to say that ultrasonics are traveling much further than some folks would want you to believe.
Adios,
Gary

You should video yours and a traditional e caller with a decibel meter so everything is equal at 10 feet or so and then move away at 100 yard or so increments and see what the difference is at greater distances.

A decibel meter measures sound volume, not frequency. A traditional e-caller is going to be louder as you sacrifice volume for sound quality. We have 15 volumes steps on the FREQ and I can only remember going to full volume on two occasions. Both were on a huge ranch in western NM when the wind was blowing 20-30 mph and I was wasting my time. Normally, I call at volume level 8 in South Texas where there's little wind and work down from there. If calling the Panhandle or other big rolling plains, I will call at about volume level 12 with 5-10 mph winds.
Most hunters grossly underestimate just how well a predator's hearing really is. Murry Burnham would tell me that a coyote could hear 7 time better than I could and I was still in my 30's back then.
Adios,
Gary

I have tested to see what makes dogs bark like crazy and found the wind speed and humidity levels make a big difference to critters being able to hear calls. On windy nights I run my Foxpro at about 1/4 volume for a few minutes, 1/2 for at least 5 minutes and if nothing responds, full volume for one minute. Then I go back to about 1/2. Many times I’ve heard the domestic dogs only cut loose after going to full volume on the windy nights. Providing they are upwind.