Buzzer Circut Wiring?

[Sweed]

So, I picked up some switches and buzzers the other day, looking to do a mini-project for something. Like if the switch is flipped to 'on', it sends power to a circut. This circut will switch to a permanent 'on' setting (there will be a switch somewhere else to turn if off, but don't consider that), sounding a buzzer. Like you flip the switch to on, buzzer goes of. Even if you flip the switch off, disconnect the power from that, the buzzer stays on, as it runs off a a seperate battery...

The Buzzer will run on up to 14 volts, its a 108db unit. Looking to have it LOUD, so higher voltage? Initial voltage from the trigger switch will be 12 volts. Any ideas/info/help? Thanks.