ePresence Interactive Media is an Open Source Web Conferencing and
Webcasting system that delivers video and synchronized presentation
media over the internet using multiple streaming formats for multiple
platforms. Freeware from the University of Toronto, Canada
A nice small freeware tool to display live microphone input levels (meaning audio gain and frequency - the starting point for audio quality control in a gain structure), plus a mic volume and mute switch, and a headset volume level switch
In order to enable this module, some course material must be prepared and installed. So it might be favorable to consider converging The Basic Program into WizIQ/Moodle first. Check the relevant module for this.
Try using an Amplifier with anEqualizer (built-in one) to boost the energy of some of the audio bands. Many are like guitar amplifiers (with a MIDI input for instruments), but look for softwares that have a Microphone input, like this one:
