Why Do Dogs Howl When I Play Flute. The high pitch is believed to be similar to another dog’s communication with them, as they are in close proximity. Your dog thinks you’re howling.
It’s believed that the high pitch reminds them of another dog in the distance communicating with them. It may just be that certain sounds cause your dog to howl in response, whether it's canine or not. Some dogs howl because they're lonely, especially if they're left alone or kept outside for many hours at a time.