A tenacious murmur of music

 "... as soon as the formidable Waindell winter began to penetrate the cosiness by means of sharp little draughts, coming not only from the window but even from the closet and the base plugs, the room had developed something like a streak of madness or mystic delusion - namely, a tenacious murmur of music, more or less classical, oddly located in Pnin's silver-washed radiator. He tried to muffle it up with a blanket, as if it were a caged songbird, but the song persisted until Mrs Thayer's old mother was removed to the hospital where she died, upon which the radiator switched to Canadian French ..."

-One of Timofey Pnin's rented rooms, in Vladimir Nabokov's Pnin