iLounge has discovered that the microphones in the Wi-Fi and 3G models of the iPad 2 have different sonic qualities. As noted in our comprehensive review, the microphone hole of the iPad 2 has been moved from its position beside the headphone port in the original to the middle of the device, over top of the front-facing camera; the shape has also changed from a circle to a pill-shaped hole. These changes mean that the microphone of iPad 2 Wi-Fi models sits in the metal housing, but in the plastic antenna strip at the top of both the GSM and CDMA 3G models. Perhaps due to this change in materials, the Wi-Fi model offers markedly cleaner audio than that of the 3G, which sounds slightly muffled and echo-prone as a result. Curiously, we found the GSM 3G model’s audio to be slightly preferable to that of the CDMA model, which seemed to suffer the issues more severely. The problem is particularly evident when the iPad’s screen is facing the user, as is the case when using FaceTime and a great many other apps; it is unclear whether Apple will make any modifications to the devices’ microphones mid-production to help minimize the differences.