Shout back at her in anger and be "straightforward/honest" and tell the neighbour:
"DON'T SCREECH AT ME WOMAN.. WE ARE NOT MAKING ANY NOISE... IF YOU FEEL IT'S NOISY, PUT EARBUDS AND SLEEP"
Well, I chose to go the kinder route and said "Sorry about that ma'am, it won't happen again"
See the difference, folks?