Probably not practical but there was an interesting video by Tom Scott where investigators used the electrical hum background noise to determine when something

Probably not practical but there was an interesting video by Tom Scott where investigators used the electrical hum background noise to determine when something was recorded. Maybe there is a way to audio record something to prove location. https://youtu.be/e0elNU0iOMY?si=55hbtQ5dZ6Tx3VtJ https://youtu.be/e0elNU0iOMY?si=55hbtQ5dZ6Tx3VtJ