Crónán describes the kind of sound that hovers at the edge of melody — a bee's drone, an old woman's humming, the low wash of waves — and its poetic use draws on this quality of half-heard, continuous sound. In Irish folk poetry it is associated with domestic peace, the turning of seasons, and the gentle rhythms of rural life. Poets drawn to the textures of Irish landscape and sound found crónán useful for capturing an acoustic atmosphere that felt distinctively Celtic. Nora Hopper Chesson and her contemporaries used such sonic imagery to evoke an Ireland of drowsy beauty and ancient unhurried time.

Crónán describes a low humming or droning sound, such as that of bees, the sea, or a soft chant. In poetry, it evokes a sense of continuous, underlying presence or meditation. The crónán is often associated with the creative process, where the poet hums while composing. It can also represent the soothing sounds of nature that provide comfort or the ominous drone of approaching danger. This auditory image adds texture to poetic descriptions, appealing to the ear as well as the eye.