Cats express their emotions in a voice. It is not less true, than the gestures and poses. Cats always pronounce those sounds which are considered suitable in a given situation. The owner, carefully and often listen to your pet and talk to him, soon begins to grasp the different shades of sounds produced by animals, hence, what it “says”. Of course, this understanding does not occur immediately. For communication it is necessary not only to listen but to respond.
To master the cat dictionary is a snap. So, in the evenings the cat will harass you to certain sounds, making the “go to sleep”. Cats love to sleep at the same time.
On your return home and the cat will welcome special cooing sounds (usually these are called purring). Especially if you’re welcome in response.