Unraveling the Mystery: How My Scanner Picked Up Bluetooth Audio

Recently, I encountered an intriguing situation that left me scratching my head. My wife often listens to her favorite playlists using a pair of Bluetooth headphones connected directly to her phone—no adapters or docks involved. While I was experimenting with my radio scanner, I stumbled upon a frequency—151.940 MHz—where, to my astonishment, I could clearly hear the music she was streaming on Spotify.

This unexpected experience prompted me to investigate further. I initially thought that Bluetooth signals were encrypted and typically operated on the 2.4 GHz band, making it puzzling to hear her audio through my radio scanner. What I was hearing wasn’t just a faint interference or static; the sound was crisp and clean, resembling an actual analog transmission.

Curious about how this was possible, I double-checked with my wife, who confirmed that she was indeed listening to Spotify through her headphones at that moment. I carefully examined the setup and found no visible transmitter or wireless audio adapters—just her phone and the headphones.

This led me to wonder: How could my scanner receive a clear audio signal from her Bluetooth headphones? If you’ve encountered something similar or have insights into this phenomenon, I would love to hear your thoughts. It seems to challenge some of the fundamental assumptions I had about Bluetooth technology and its functionality. Join the conversation—let’s unravel this mystery together!