You can use the newly available Voice Recorder ICs with 100 years of data retension without battery. You can record the sound of TUG in it and connect its output to a high power audio amp. to get desired loud sound.
I think HT81003 Voice IC will best suit your application. A small IC in 16-pin DIP package with 3 second recording.
Visit these pages for more info. on Voice ICs
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