I gave noise-training a shot at the strong encouragement of a friend, Robin. After all, Allie used to fall asleep in the living room with the TV on when she was a newborn, and right up until she got sick and I had to nap her in her room for the elevated crib mattress and humidifier, she did take some naps in the living room. So maybe she’s not a light sleeper, but this is just a phase cuz she’s getting more alert, right? Here’s what happened as relayed in a conversation between me and Robin:

Me: THE JERK NEIGHBOR’S CIRCULAR SAW ON THE FRONT YARD WOKE THE BABY AGAIN!@#$ Why can’t he do his crap in the garage like everyone else?
Robin: Again, let the baby be exposed to some noise. You can’t tiptoe around her forever. She will never get used to noise. Leave a tv on at a normal level while getting her to sleep and nap in the room with it. Stuff like that. Your sanity and sleep will improve. 🙂
Me: okay, I’ll try to put her down for her next nap in the living room with the TV on, but history tells me that she won’t go down with that much noise around anymore.
Robin: Keep her around noise all the time and she will fall asleep even if she fights it. It’s not easy but not having dinner parties etc. because your kid is a light sleeper just doesn’t make for a fun few years.
Me: I don’t think it’s possible to turn a light sleeper into a deep sleeper, but I’ll use more background noise and see if it makes any difference.
Robin: It really does help. [Son] could sleep during anything. Even when we went bowling! 🙂
Me: oh, I thought he was born a good sleeper.
Robin: He was. But as kids get older stuff changes and you have to flex. So, when I couldn’t rock him to sleep, he got car rides. Then more noise as he could walk so he would stay in bed (if he was awake and could hear you in the next room would crawl out of crib). Had to stay up late and keep up with noise so he could ignore it and allow himself to sleep. For me noise would keep him up more than wake him up
Me: [8 minutes later] Allie’s now in her activity walker “listening” to a Friends episode with her back to the TV.
Me: [40 mins later] She couldn’t do it. I started soothing her to sleep in the living room by the TV. She kept looking around and wouldn’t relax. Then she got tired enough to start fussing. I took her to her room upstairs, and as soon as we went in and she was in the darker room with the air purifier humming, she relaxed and started dozing. As she was falling asleep on me, I started slowly walking out into the hall where some TV could be heard. She woke up, and I kept soothing, trying to get closer and closer to the living room again, but she kept waking up. So I finally gave up and went back in her room where she fell asleep immediately, and set her in her crib and closed the door.