Am I Normal?habits
I make involuntary sounds or hum when I'm concentrating deeply
Concentration vocalisation is linked to the closed-mouth acoustic filtering effect — low-level humming or sound-making creates a mild white noise that partially masks distracting environmental sounds. It may also function as a proprioceptive grounding signal, keeping the self-monitoring system active during abstract tasks.
Have you ever done this?
Be honest — have you ever done this?
Related fact
Many famous thinkers and composers were habitual hummers or sound-makers during work. Glenn Gould, the pianist, was so audibly vocal during performance that early recordings capture his voice alongside his playing.