The iPhone has many White Noise apps for cheap money so you can afford to find the best one. We like the ocean noise. Also, the iPhone is ready for Europe with GSM quad technology so it works for phone and data in europe AND it recognizes 220v so you don't need a transformer, just a plug adapter. So, you can keep the white noise generator on all night. ALSO, the iPhone can give u European maps, GPS, Internet, AND language translators that will even pronounce.
I use a BlueTooth wireless headset for the white noise on the plane, train and in the hotel.