[PSUBS-MAILIST] Matilda - you'll never dive alone

[Jon Wallace]

Thought this might interest some of you.  With little effort I can 
incorporate some basic audible alarms into my environment monitoring 
project to notify me of off-scale sensor conditions.  At first I 
considered just sounding a buzzer and flashing a light next to the 
sensor that was off scale.  For just a few dollars more I can include 
mp3 playback of synthesized voice warnings for a particular off-scale 
operating condition, ie. low oxygen, high carbon dioxide. I edited 
together some aircraft warning sounds along with synthesized voice from 
an online text-to-speech convertor to create a small library of voice 
warnings I call "Matilda".  MP3 recordings attached.  It requires a bit 
more hardware but from a software perspective the program is only a few 
lines longer than implementing a basic piezo buzzer alarm.

Pre-dive checklist will include testing alarms to ensure they are 
working correctly and an override button will allow stopping the alarm 
during operations so you don't have to listen "Matilda" all the way to 
the surface.  I've decided to use the "buzz,buzz,buzz,buzz" sound for 
informational alarms and the "whoop,whoop" sound for emergency alarms.  
Now if only I could find text-to-speech translator for Yosemite Sam or 
Foghorn Leghorn to make it really unique.

Jon
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