What literary device is the trickle trickle trickle of the creek water was soothing?

The phrase "trickle trickle trickle" employs onomatopoeia, a literary device where Words imitate the sounds they describe. This repetition of the Word "trickle" evokes the soothing sound of flowing water, enhancing the imagery and sensory experience for the reader. Additionally, the use of alliteration with the "t" sound adds a rhythmic quality, further emphasizing the calming nature of the creek.