ものおと物音monooto
1.
A sound that is produced by an object or event, often emphasizing the impression of being unintended or unexpected.
2.
A noise that is not easily identifiable, typically arising from natural sources like wind or waves, but distinct from specific, recognizable sounds.
3.
An audible expression of a disturbance or interruption in one's environment, implying a lack of clarity about its origin.
Example:
少年は物音に震えた。