Thank You all very much for the wireless microphone advice.
Tried an easily available Martin Ranger WM-100 for two sessions of a 70 person senior class. Regardless of prompting, the “students” would not consistently keep the microphone close to their mouths. Reverted to “stand up and speak loudly”. Regret that the sponsoring university did not respond to a request for advice. I’m a long retired EE but not an audio expert.
Bob Knepper
