Plangent
/ˈplændʒənt/
Definition 1 of 1
Pro Tip 1/3Emotional Weight
Plangent often implies a deep emotional impact or a sense of melancholy. 
Her voice had a plangent quality that moved the audience to tears.
Pro Tip 2/3Audiobook Use
It's frequently used in literature to describe sounds evoking sadness, useful for setting a scene. 
In the audiobook, the narrator's plangent tone perfectly captured the sorrow of the scene.
Pro Tip 3/3Expressive Sounds
'Plangent' captures more than loudness; it suggests sounds that resonate emotionally. 
The plangent wail of the violin stirred up a haunting atmosphere.