Maybe a Dash-7, they had/have very high aspect ratio wings (STOL). They are very quiet.
http://www.airliners.net/open.file/694304/M/
Most of the photos have the
big flaps extended.
IIRC, only 100 were built. Not enough people needed the STOL.
They used to used by commuter lines from KDCA. The plane would line up on the runway, there'd be a gentle "whirr whirr" and it would amble a few plane-lengths down the runway and float magestically up into the air. A drsmatic difference from jets.