You may need to turn up your volume (and make sure you're using headphones) in this part! You'll hear a sound and need to walk in the direction of the sound--if you hear it in your left ear, step to the left, in your right ear, step to the right, and in the center, then walk forward. Note that there's no penalty for stepping in the wrong direction, either! So as the surrounding noises start to make it harder to hear, you can keep trying different directions until you get the right ones!