Today I noticed that after the click sound (the sound that plays when you click on buttons, etc. For example, when you open the apps drawer, press on the home button, etc), about 1 second or so after the sound finishes, there is a barely audible "pop". I tried putting my ear close to the speaker, and it seems that the click sound file stays open (for lack of a better word) for about 1 second, and then makes that popping noise as it's closing.
Has anyone else noticed this, or is this just a defect on my phone?
EDIT: Just noticed that this popping noise also happens on other sounds, not just the click sounds. It seems this happens every time the sound file closes.