hmmm i dont know about your girl but when pin was born, my house here was also doing upgrading, so alot of drilling n stuff n those construction workers also keep shouting.
actually my house area is always noisy bah,(i live in chinatown btw) but pin was ok...
think she got used to it already..
but i think if you put her inclined, she will feel quite uncomfy.
most ppl will place the childon a flat surface instead.
if you r worried, maybe you can invest in a babysafe mattress.