R sounds are rough, and L sounds are smooth, according to cross-cultural study

People around the world associate a trilled R sound with a rough texture and a jagged shape, and an L sound with smooth texture and a flat shape, according to the findings of a new study. Researchers believe this association may be more universal than the famous bouba/kiki effect.
Read more: R sounds are rough, and L sounds are smooth, according to cross-cultural study