Specific types of sounds result in the same types of shapes and colors and unexpected sounds particularly when my eyes are closed produce the strongest illusions. There are some color/sound overlaps I can only "see" when my eyes are closed however an unexpected dog bark will result in an effect I perceive in full day light.
The related shapes I "see" are also based on the sound I hear.
For example, a vaccum or motor gives me gentle waves or pulses of blue that start low in my "vision" while that surprise dog bark will be a bright white explosion usually in the top right of my "vision"
The related shapes I "see" are also based on the sound I hear.
For example, a vaccum or motor gives me gentle waves or pulses of blue that start low in my "vision" while that surprise dog bark will be a bright white explosion usually in the top right of my "vision"