https://www.theguardian.com/media/2018/apr/08/an-oasis-of-calm-quaker-groups-30-minutes-of-silence
When I tried to give an audience a chance to experience meditation, I had the whole room stay silent and still while concentrating on some point in what they could see, for one minute. If you stay silent and still for one minute, it can seem like a very long time.
I have never heard any reaction. One of the communication and social problems with meditation and quiet reflection is the logical and historical habit of dreading "dead air". If no voice or music or special sound can be heard, how can we know that the whole broadcasting is working? If we hear no signal, maybe our receiver is on the blink.
I applaud the idea of having the courage and imagination to broadcast from a room of people sitting in silence and stillness, especially if doing so encourages people to try such sitting for themselves. I have been impressed by the sad stories told by Dan Harris (10% Happier, Meditation for Fidgety Skeptics) and Amit Sood, MD (Mindfulness Redesigned for the 21st Century). Both men feel that attention training for 10 minutes a day can enhance body, mind and spirit but like physical exercise, it has not been advertised and promoted well. Few people even try it and fewer still make a regular habit of it.
So you can see the situation: we want to explain the value of sitting still and quietly, just being. In such silence and stillness, one can discern the issues that currently dominate one's life. One can sense what is peripheral and what is central. So, you might want to encourage still, silent presence. And, you might want to offer others a chance to try silent stillness. So, despite the traditions of broadcasting, you might broadcast a room of silent still people sitting that way for half an hour. You might hear a few coughs, maybe a sneeze. Someone had to leave and maybe someone enters late.