My Galaxy S4 makes a strange sound when I scroll in Chrome, but only on the Wikipedia search results page. Here is a sample I recorded as a .wav file. To make this I held my phone to my laptop's case which conducted the sound quite well. You can hear the difference between the scrolling sound and the normal "vibrate" tone (set by increasing the volume from mute). It happens when scrolling in any direction in any orientation. ...is that weird?