Study Desk · Pomodoro 25/5
25 minutes of work and 5 of rest over grey noise; a bell at each switch. 3 cycles. The noise covers surrounding sounds.
How is it made?
- Grey noise
- Bell · 392 Hz, pattern repeating every 30 min
Sound is generated on this device in real time; no files are downloaded from a server. There is a 2 s fade-in at the start and a 0 min fade-out at the end.
Evidence
B · Moderate evidenceA few controlled studies or meta-analyses; reasonable but limited generalisability.
Helps mask surrounding sounds.
Evidence level B: Moderate evidence- What do we know?
- Auditory masking is an established psychoacoustic phenomenon: a steady sound raises the detection threshold of other sounds in similar frequency bands. This is why noise is used to cover ambient sounds.
- What don't we know?
- It is not clear that masking translates into protected sleep: in a 25-person lab study, adding pink noise to intermittent environmental noise worsened sleep structure further, and earplugs worked better. A systematic review warns that continuous noise may also affect hearing.
A session's level is the weakest of its linked claims; it is never raised by a strong but unrelated claim.
Keep your device volume comfortable, preferably below 60%. You can also use your device's headphone-safety settings.