You probably can’t hear a dog whistle because the frequency is too high. Dogs hear higher freqencies better than people do. That’s why dog whistles seem to be silent. High frequency sounds usual travel further than voices.
Dog trainers use dog whistles to get a dog’s attention. Some think different breeds react to different high frequecies. Smaller dogs are more sensitive to higher frequencies.
These dog whistle MP3 files can be used to train yor pet. Download them and make dog whistle ringtones for your cell phone. Or use them as the startup sound or mail notification sound in your computer to fool your pet. (Think prank!)
Each MP3 file is 10 seconds long at the specified frequency. The frequency of each file is 400 Hz higher than the previous one. Dogs lose their hearing as they age just like people do. Test each of the sounds with your dog(s) to see which one(s) works better. Remember: the higher the number in the name, the higher the dog whistle's frequency.
Your computer speaker probably won’t reproduce these high pitched sounds accurately. My suggestion is to download them onto your computer and burn a CD. Or simply play them through better speakers than your computer’s.
Dog whistles are also called Galton's whistles after Francis Galton who invented them. Galton was Darwin’s half cousin and coined the phrase nature versus nurture. So blame him, not someone else.
Don’t think dogs are man's best friend? Put a dog & your wife in the trunk of a car for an hour. When you open it, who’s really happy to see you? More dog jokes.