Psensor, audible repeating sound for alert alarm?
Since psensor 0.8.0.4, open psensor preferences and set "Script executed when an alarm is raised" to the path of a shell script playing a sound.
Example of a trivial script which plays a sound:
#!/bin/sh
play -q /usr/share/sounds/alsa/Noise.wav
You can upgrade psensor to a newer version than Ubuntu Trusty 11.04 (psensor 0.8.0.3) by using the PPA: ppa:jfi/ppa.
sudo apt-add-repository ppa:jfi/ppa
sudo apt-get update
sudo apt-get install psensor