Radios for the North American market, even Sangean and Tecson, don't go below 87.5.
Transmitting below would be on unreceivable space and very few have a Sony ICF-801 or similar made for the Japanese, Asian, Russian markets.
Better to get a wireless mic that is 87.5, 7, 9 etc so most radios can get it. You can get the Sony ICF-801 on Amazon and you would have to tell your listeners. Most cars go to 87.7.
As for 84.922?, you are off center frequency and a digital radio like a Sangean or Tecson or a car even if it went there would be detuned and causing adjacent interference., and if very selective would just get the fringes. An analog tuner would get it but still with the other mentioned problems.
This wireless mic loophole is interesting but seems like getting one operating on 87.5-87.9, right on frequency, is the stumbling block.
But just thought of this.....there's 1000s, maybe millions?, of radios out there with TV audio bands VHF (old channel 2-13) and would get this nicely! And these radios come a dime a dozen on Ebay.
Yes analog between 5-6. But my listeners need a Radio with a sensitivity of 0.9 microvolts as I wrote to the FCC agent who visited me about. If people like The Legacy and we find them affordable Radios they will listen and a Channel Master or Wineguard antenna on the roof they should hear me 2 miles out.
Now we have our National Hobby Broadcast frequency 84.922 Mhz @ 50 me as the agent told me the Wireless headphone made by ONN is 100% legal and if I wanted to experiment and post it on the Deltaville VA Facebook page I could.
He is saying that not everyone will get the same range but being that I'm near water you're in Deltaville it may cause the signal to carry out pretty far to a very sensitive radio and there's nothing bend the rules that prevent me fromm telling whoever I want my frequency and the fact that I'm transmitting there you.
These headphones are quite affordable and I think it could be the resolution that will stop FM piracy as I have explained to the agent and told him I am very excited to let everyone know about this. He sort of laughed but he also says to be careful that there is not a Channel 6 to close to you that you might interfere with but that's easily to find out about. He did say that most Channel 6 has that are operating at low power will be off the air in 2020 and that the frequency should be blank for everybody. This means hobby Broadcasting on that frequency.
Thanks to everyone that brought this to my attention the new radio Revolution has now done everyone a great favor bye making this loophole as the agent says and very legal a way that we can broadcast without getting into trouble. So the Legacy will be promoting radios that will go down there. I suspect the makers of these headphones are going to be getting tons of orders now. I'm also going to spread this all over the internet this is going to be the national hobby broadcast frequency.