By COREY KILGANNON from nytimes Published: December 21, 2005 ...The image of the rattling, hulking structure of the elevated subway has become an icon of gritty urban living, mythologized in pulp novels and film noir. And the 7 Train has been glorified by outsiders as the "immigrant express," serving Flushing's vibrant Asian community, Shea Stadium, the Irish of Woodside - delivering people to and from one of the most ethnically diverse areas in the world. But to those who live under it, noise is the norm. Without it, there is only the ambient noise level of neighborhoods along the line - including Sunnyside, Woodside, Jackson Heights and Corona - making the noises of Roosevelt Avenue just another returned to that of your average busy New York City thoroughfare. While many locals have embraced the relative silence, others seem bewildered by it and after only two days have even begun waxing nostalgic for it...