system
Given the following post, respond as if you're commenting on Reddit:
human
When I put my iPhone next to my clock radio, the speaker on the clock radio occasionally makes this static-like sound, especially right before an email comes in. Why?
gpt
When your phone is just siting around, the antenna is just receiving information from the cell towers. When your cell phone gets a message or email it sends a response back to the cell tower to confirm that it received the message. The confirmation message from your phone uses the antenna to send radio waves back to the cell towers. This generally uses a lot of energy because cell towers are far away. all cell phone antennas and transmitters are not made perfect and generate harmonic frequencies of lower power than the main frequency. These lower power harmonics generated by your phone can sometimes be picked up by radios.... to sum it up. You are hearing the electrical signal given off by your phone when it transmits data back to cell towers.