Rodenstock ColorMatic IQ® lenses are the most quickly self-tinting lenses in the world. We want to raise awareness of this among potential customers by applying a groundbreaking concept: We have translated the purely visual feature of darkening and lightening glasses into the purely acoustic medium of radio. The speed with which the lenses tint and untint is symbolized by our voice-over artists, whose pitch alternates between the high and low. In other words, they use a light voice when they are in darkness, and change to a dark voice when they are in the light.