Motorola :: EM330 Text Message Notification Alarm?

When I get a text message from anyone, I get this notification chirp sound that is VERY loud. Once I was walking down the hall at work with it in my hand and the alarm went off. Someone jokingly said it sounded like a pacemaker alarm going off. Anyway, this notification usually startles me and since I share an office with 3 other people in a cubicle, I don't want this notification going off. I don't text a lot thankfully, but when I do this loud alarm really is annoying to both me and I'm sure to my co-workers.

Is there a way to change it to where I do not receive the notification when I get a text message without turning off the rest of the ringtones (i.e. putting it on vibrate)? Or is there somewhere on the phone itself I can change it? Or at least lower the volume of this notification? It doesn't seem to be in direct correlation with the volume of the phone because I've got the ring volume at 1 so I can keep down the volume, but still hear the ringtone when the phone is sitting on my desk. But this notification tone is REALLY loud. My choices shouldn't be "off" and "really loud".