SOUND TOOLS
Decibel calculator
Add independent sound levels by energy, compare decibel differences or estimate ideal distance attenuation.
Ready when you are
dB
01 / Meter
How to use this tool
- Choose level addition or the distance calculation.
- Enter compatible levels or the two distances.
- Read the result alongside the assumptions.
02 / FAQ
Frequently asked questions
Why not add decibel numbers directly?
Decibels are logarithmic. Independent levels combine as 10 log10 of the sum of their linear energy ratios.
What are the limits?
Distance estimates assume a point source in a free field; rooms, barriers and extended sources differ.
03 / IPHONE APP
Keep your noise checks together
dB Pulse: Decibel Meter is for iPhone with iOS 26+. Keep track of daily noise dose, sustained-noise alarms, saved sessions, Lock Screen Live Activity and widgets.
Get dB Pulse for iPhone ↗
Pro adds advanced alarms, a spectrum analyzer, unlimited history, report export, session notes, supported microphone profile matching and an Apple Watch meter.
Back to the meter ↗