Ever wonder what a dog whistle actually sounds like to animals?In this video I use a special microphone, the Sanken CO-100k that can record frequencies up to 100 kHz, way higher than typical ...

This explains why a dog can hear the ultrasound produced by a dog whistle, but humans cannot. A builder uses an ultrasonic device to measure the length of a room. The device shows that the ...

This explains why a dog can hear the ultrasound produced by a dog whistle, but humans cannot. A builder uses an ultrasonic device to measure the length of a room. The device shows that the ...