Top 5 communication a dog does by braking 

Dogs often communicate using a combination of pitch and sound in their bark, here are Top 5  dog bark breakdown to understand the same.

• Growling: if you hear a low, rumbling bark sound, understand the dog is growling
• Warning: A slow, deep bark can be a warning to a person, another dog, or an animal. 
• Threat: A low-pitched, sustained bark can signal a dog feeling threatened and protective. 
• Howling: A howl to the sky indicates loneliness, boredom, or a desire to communicate with other dogs. 
• Whining: A whiny bark with an attempt to grab attention indicates a need for attention, discomfort, or a desire for something.