. >> reporter: louise smith has lived in this home in d.c.'or over 50 years. she says whether metro says it or not, these newer trains are having an effect. >> when the train went through here one day, one of these fell and broke all to pieces. >> reporter: is it every day -- >> every day, every day. >> reporter: now, metro does admit some of these newer railcars are a bit louder and more vibration coming from them. they say all that vibration comes from the older railcars. in a recent letter metro's general manager says none of the increased vibrational levels are damage. so, at this point this is all still a bit of a mystery. in the meantime, though, residents like mrs. smith say they'd just like to hear from metro directly about the issue. >> nobody from metro have been here. nobody have called me. >> reporter: along the green line, adam tuss, news4. >> crossing -- well, you know, that rumbling, you've got to appreciate the fact people try to sleep and, you know, it can make -- it can be disturbing. >> it really can, especially if it's happ