Reducing ambient noise without playing back music [Quiet Mode] (NWZ-E573/E574/E575 only)

You can use the Noise Canceling effect to obtain some peace and quiet.
  1. Connect the supplied headphones to your Walkman, and from the Home menu, select [Noise Canceling] [Noise Canceling: On/Off] [On].

  1. From the Home menu, select [Noise Canceling] [Quiet Mode].