Free hearing & audio tools
Simple browser tools for measuring and testing sound and hearing. No signup, no download, nothing recorded or uploaded. Built by the team behind Spy Hearing.
Decibel Meter
Measure ambient sound level (dB SPL) using your device microphone.
Open tool →Hearing Age Test
Find the highest frequency your ears can hear. 60-second test with headphones.
Open tool →Live Listen Compatibility Checker
Pick your AirPods and iPhone. See which Apple hearing features work with your setup.
Open tool →Safe Listening Time Calculator
How long a given dB level is safe, using NIOSH and OSHA workplace exposure formulas.
Open tool →Frequency Range Test
Test both the bottom (bass) and top (treble) of your audible frequency range. 20 Hz to 22 kHz.
Open tool →