I've long felt that the truest luxury in today's world is silence.
I'll likely always prefer some amount of white noise to a totally silent space. A smooth-running fan has regenerative properties for me. Up to certain thresholds, I can turn that fan up to drown out the majority of whatever noise might be going on outside my room or building. It's helpful to be able to disconnect and float in your cocoon, whether for work, play, meditation or sleep.