While Basenjis do not have a sustained bark like your typical domesticated canine, they are capable of making sounds such as howling, screaming, growling, yelping and their famous happy sound, the yodel. Some can even be trained to make sounds on command, while there have been others that seem to say human words. You might get one that is very quiet to for years and then all of a sudden one day they belt out the biggest yodel that appears to have come from deep down and pushed out by the greatest of efforts. Each one is individual.