Explore the fascinating phenomenon of micro-lensing in gravitational wave signals, focusing on the effect of galaxy lenses in this insightful 21-minute lecture. Delve into the intricate interplay between gravitational waves and galactic structures as the speaker examines how galaxies can act as lenses, altering the perception of these cosmic ripples. Gain a deeper understanding of this cutting-edge topic in astrophysics and its implications for our observations of the universe.