🎧 Sound Direction Test: Left Ear or Right Ear?

A short tone plays from somewhere between your two ears and you mark where you heard it on a left-to-right bar, twelve rounds in a row. The scoring is pegged to guesswork: always tapping the centre averages exactly zero, so points come only from genuine localisation and a hunch will not move you up the board. What it measures is how finely you use the tiny timing and loudness gap between your ears. Headphones are essential — laptop speakers collapse the stereo image entirely.