Customize sound (volume and type) of notification

Would like to be able to set audible email notifications to custom options. Or at least have other ringtone options that can wake me up at night. I work an after-hours position and need something loud, long, and annoying to wake me up in the middle of the night. Or that I can hear from another room, if I get up and walk away from my phone for a minute.

Would like a different sound for calendar meetings compared with emails