Ribbed sound is a urethral sound with a special ribbed texture made for more intense stimulation. There are many different types of ribbed sounds so there is not just one model you can choose from. Ribbed sounds are typically a sub-type of textured sounds. Textured sounds have beads, bumps, waves and other textures made for a more intense stimulation. However, ribbed sounds go one step further: these have ribs as a texture so they can produce very intense and powerful feelings. Depending of the size and the number of ribs, a sound can be more or less extreme. These are some important things to keep in mind when choosing a ribbed sound for yourself.
It is important to note that ribbed sounds are mainly made for the more experienced users or those who are into painful pleasures. Beginner users are strongly advised to start with smooth, comfortable sounds to get used to the feeling of urethral stimulation. It is also important to use plenty of lube. Once you are more experienced and once you want to have some additional stimulation during urethral play, start experimenting with a ribbed sound. It is important to use even more lube to make a ribbed sound comfortable. On the other hand, those who are into pain and cock and ball torture (CBT) will appreciate ribbed sounds because they can be used to produce extreme sensations.