Room Noise Test – Background Noise Level & Hum Check
Noise floorReady
- Allow the mic in the address bar
- Choose the right input device
- Audio never leaves the tab
- Runs inside your browser
- No upload, no account
- Nothing saved after you close
Background noise and hum check for recording rooms
This room noise test measures your background noise floor and the strongest noise frequency through your microphone. Run it before recording to catch fans, fridges and mains hum.
Good noise floors
Below −60 dBFS on a typical USB mic is quiet enough for voice recording; above −45 dBFS you will hear hiss and hum.
Common sources
50/60 Hz hum: power supplies, ground loopsBroadband hiss: fans, air conditioningLow rumble: traffic, fridges.
How to Use the
Room Noise Test
- 01
Silence
stay quiet and switch off what you can.
- 02
Start
allow microphone access.
- 03
Read
note the level and strongest frequency.
- 04
Improve
turn off appliances one by one and compare.
Good noise floors
Below −60 dBFS on a typical USB mic is quiet enough for voice recording; above −45 dBFS you will hear hiss and hum.
Common sources
- 50/60 Hz hum: power supplies, ground loops
- Broadband hiss: fans, air conditioning
- Low rumble: traffic, fridges
Related guides and fixes
Learn more in these guides: Microphone not working, Microphone settings, Discord mic fixes, Decibel levels chart, What is LUFS.
Frequently Asked Questions
Q.dBFS vs dB SPL?
dBFS is digital; use the decibel meter for an SPL estimate.
Q.Is this calibrated?
No.
Q.Which mic?
The one you will record with.