SonicSenses Lab
A/B listening comparator
Expectation shapes what people hear. Switching between two sounds at the same level - and, if you like, without knowing which is which - keeps the comparison honest.
Evidence rating: Established science
Pick two sounds and switch between them.
Headphones give the clearest result, but speakers work for this demo too.
This is a listening aid, not a controlled experiment. Both sources run through the same gain stage, but a true level-matched blind test also needs calibrated loudness matching and repeated trials.
Every Lab demo is generated by your own browser and stops when you leave the page. Start quiet, raise slowly, and see our listening safety guidance. Nothing here is medical advice or a treatment.