Throat mikes were used for cadet / instructor intercom by the Air Cadets in the Venture motor glider. We instructors got very good at identifying the onset of air sickness in our cadet passengers (a good instructor could recognise the signs before the cadet!) and whilst being in close proximity to someone filling a Bag - Air Sickness is not exactly pleasant, listening to someone vomiting amplified by throat mikes is a once heard, never again, experience. This is where the skill of the instructor came in, at the first sign of the cadet feeling unwell we instructors would throw our headsets onto the shelf behind us and simultaneously turning the aircraft towards the airfield.
The later headsets with boom mikes were better, but we had to ensure that the cadet removed the mike 'out of the line of fire' if they felt unwell.