Dog whistles work by emitting a high-pitched sound that dogs can hear but humans can't. This is because dogs' hearing range is much wider than ours, and they can hear sounds up to 45,000 hertz (Hz), while humans can only hear sounds up to 20,000 Hz.
Making a dog whistle is a simple project that can be done with a few household items.
Materials:
* A metal tube (such as a drinking straw or a piece of PVC pipe)
* A piece of wood or plastic
* A sharp knife
* A drill
* A small nail or screw
Instructions:
1. Cut the metal tube to about 3 inches long.
2. Drill a small hole in the center of the piece of wood or plastic.
3. Insert the nail or screw into the hole, making sure that it is tight enough to stay in place.
4. Place the metal tube over the nail or screw, making sure that it is centered over the hole.
5. Blow into the tube.
The dog whistle should emit a high-pitched sound that dogs can hear. You can experiment with the length of the tube and the size of the hole to change the pitch of the whistle.
Tips:
* To make a louder whistle, use a larger metal tube.
* To make a higher-pitched whistle, use a smaller hole.
* To make a lower-pitched whistle, use a larger hole.
* You can also experiment with different materials for the tube and the wood or plastic piece. Different materials will produce different sounds.
Safety:
* Always wear eye protection when working with sharp objects.
* Be careful not to blow too hard into the whistle, as this could damage your ears.