There’s a company located in South Korea called petpuls that has developed over the span of 3 years that collected over 10,000 samples from about 50 breeds of dogs analyzing their barks and then found a way to turn them into emotions. Those emotions are happy, sad, anxious, relaxed, sad and angry.
Using A.I, they turned each bark into a real time emotion. It uses an app through your phone so you can know how your dog feels at any given time when it barks. The app is free but you need the collar which will set you back $99 or if you have a larger breed it’ll cost you $108.
You can see a picture of it here.