This instrument has a bunch of fans that can rapidly open and close the tubular resonators underneath, creating an undulating pitch.
A musician who primarily played this instrument developed a tune he nervously whistled while waiting for his first plane ride into the song "Flying Home." Tal Farlow and Charles Mingus joined the "trio" of a bandleader who played this instrument, Red Norvo. One player of this instrument referenced the nickname he got for being perpetually sleepless in the title of his standard "Bags' Groove." Milt Jackson, a member of the Modern Jazz Quartet, played this instrument, as did (*) Lionel Hampton. Gary Burton promoted the "four-mallet" style of playing this instrument as an alternative to the "two-mallet" style. This instrument has a bunch of fans that can rapidly open and close the tubular resonators underneath, creating an undulating pitch. For 10 points, name this percussion instrument with tuned metal bars, named for its ability to pulsate. 
A musician who primarily played this instrument developed a tune he nervously whistled while waiting for his first plane ride into the song "Flying Home."
vibraphone [or vibes; or vibraharp] 