Many thanks to SWLing Post contributor, Dan Van Hoy (VR2HF), who writes:
LISTEN TO THE MUSIC OF THE METEORS!
No matter what the skycover in the coming few days you can hear the Perseid Meteor Shower live via my receiver on 49.749 MHz USB. The hollow PINGS are brief bursts of signal from a TV station transmitter here in Asia enabled by meteors as they streak through the ionosphere. As with viewing the Perseids, patience pays rich rewards of hearing the amazing music of the meteors. Enjoy! Dan…VR2HF
Thank you for sharing this Dan. I have heard a number of pings over the past few hours. Amazing!