Does interior noice for single/twin/tp really matters?

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Some cars are built to enjoy a heartbeat of its engines, like Bugati
or Porsche sports car. It's also similar to those enjoy driving Harly-

How about single-piston/twin-piston/turbo-prop aircraft?
Does anyone want to hear engine sound of their aircrafts? It seems
almost impossible to reduce a noise for those aircraft.

Without a headset, can you talk to each other?
If you use BOSE or Zulu noise cancelling headsets, is it enough or
cheaper ones will do?

-- Junyoung Yun, November 17, 2009