У вашего броузера проблема в совместимости с HTML5
This ultra-simple RF sniffer circuit will detect the emission of VHF-UHF radiation. Common sources are: cell phones, wireless phones, microwave ovens, computer screens (even LCD), wifi routers, light dimmers and fluorescent lamps.
Music album:
https://distrokid.com/hyperfollow/rekena/short-stories