Sound Meter - Decibelscope
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About this app
Sound meter apps give you a number. How far can you trust it? Decibelscope shows only the range it can trust.
Every phone has a different microphone, so the same sound reads differently. Most apps never say so - they just show a big number.
Decibelscope first shows the range this phone can measure reliably, and for anything outside it, gives you the reason instead of a made-up number.
Who this is for
- Anyone tracking noise from upstairs neighbours or nearby construction
- Anyone bothered by noise at a cafe, office or workshop
- Anyone checking how quiet the room is while a child sleeps
- Anyone who wants to know not just the number, but whether to trust it
How it shows you
- Trusted range - see at a glance whether the current value is inside the range this device can be trusted.
- Too quiet: "Below this phone's floor". Too loud: "At the limit - input clipped". It never invents a value it cannot measure.
- Values before calibration are marked "estimate".
- If this device cannot turn off microphone processing (auto gain), the app tells you.
Fit it to your phone (calibration)
- Enter a reference reading - if you own a sound level meter, type what it reads at the same spot to set the offset.
- 30 seconds in a quiet room - measure the quietest sound this phone can read (its floor).
What you can do
- Real-time now / average (Leq) / peak dB
- A-weighted (dBA), C-weighted (dBC) or unweighted, Fast/Slow response
- Keeps measuring with the screen off - with notifications on, it logs noise while you sleep or construction noise while you are out.
- When you stop, the log keeps the average and peak, plus how many moments were outside the trusted range.
- CSV export - open the log in a spreadsheet or share it as a file.
Promises
- Sound is never recorded or stored. The app only computes loudness, and no sound leaves your phone.
- No account, no sign-in.
Please note
This app is not a medical device and does not diagnose or treat any condition. It is not meant as evidence in noise disputes.
Use a certified sound level meter where legal accuracy is required. Because of microphone limits, error grows at very high levels (roughly above 100 dB).
Every phone has a different microphone, so the same sound reads differently. Most apps never say so - they just show a big number.
Decibelscope first shows the range this phone can measure reliably, and for anything outside it, gives you the reason instead of a made-up number.
Who this is for
- Anyone tracking noise from upstairs neighbours or nearby construction
- Anyone bothered by noise at a cafe, office or workshop
- Anyone checking how quiet the room is while a child sleeps
- Anyone who wants to know not just the number, but whether to trust it
How it shows you
- Trusted range - see at a glance whether the current value is inside the range this device can be trusted.
- Too quiet: "Below this phone's floor". Too loud: "At the limit - input clipped". It never invents a value it cannot measure.
- Values before calibration are marked "estimate".
- If this device cannot turn off microphone processing (auto gain), the app tells you.
Fit it to your phone (calibration)
- Enter a reference reading - if you own a sound level meter, type what it reads at the same spot to set the offset.
- 30 seconds in a quiet room - measure the quietest sound this phone can read (its floor).
What you can do
- Real-time now / average (Leq) / peak dB
- A-weighted (dBA), C-weighted (dBC) or unweighted, Fast/Slow response
- Keeps measuring with the screen off - with notifications on, it logs noise while you sleep or construction noise while you are out.
- When you stop, the log keeps the average and peak, plus how many moments were outside the trusted range.
- CSV export - open the log in a spreadsheet or share it as a file.
Promises
- Sound is never recorded or stored. The app only computes loudness, and no sound leaves your phone.
- No account, no sign-in.
Please note
This app is not a medical device and does not diagnose or treat any condition. It is not meant as evidence in noise disputes.
Use a certified sound level meter where legal accuracy is required. Because of microphone limits, error grows at very high levels (roughly above 100 dB).
Sound meter that shows only what it can trust. Out of range, it tells you why.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
What’s new
· Stability improvements and bug fixes
