A Hidden Dog Whistle
If you thought The Beatles couldn’t find any more way to surprise you, hold your horses. The song, A Day in the Life, by the legendary Beetles rock group, was one of the most experimental songs of its time. But it did not only vary its structure in ways that few other songs did before. It also has a secret sound that humans cannot even hear.
The end of the song features a high-pitched frequency that is difficult for a lot of humans to pick up on. However, this sound is within the hearing range of a dog. If you have a dog, try playing the end of this song to see how they react! Hopefully, they’ll find it amusing rather than annoying.