Hälinänä
Hälinänä is a Finnish word that can refer to a low, continuous humming or buzzing sound. It often describes the sound made by a swarm of insects, such as bees or flies, or the collective noise of many people talking or moving in a confined space. The word conveys a sense of ambient, pervasive sound rather than a distinct, sharp noise.
In a broader, more metaphorical sense, hälinänä can also describe a general atmosphere of busyness or commotion.
The word is onomatopoeic in nature, attempting to mimic the sound it describes. Its usage is common