[HOW-TO] - Turn Off Audible Notifications from New Email

If this is for your gmail account do the following:

• Open Gmail
• Hit the menu button and select settings
• Tap the account you want to turn notifications off for
• Tap on Ringtone & Vibrate ("Sound & vibrate" after Gmail updates")
• Tap on Ringtone and select Silent, then tap OK
• Hit the back button until it takes you back to your inbox. No more audible notifications