Howtosignalprocessing
Your phone is transmitting/receiving those electromagnetic signals. What is happening between the speaker and the phone: The wires in your speakers are inappropriately acting as antennas and are picking up your phones transmissions.
- Why do speakers make a noise before a phone call?
- Why do cell phones cause interference with speakers?
- Why do speakers make things vibrate?
- Why do my speakers make a noise when my cell phone gets a call?
Why do speakers make a noise before a phone call?
So what causes this noise? Basically, it's the cell phone talking to the tower, and nearby speakers picking up that radio transmission.
Why do cell phones cause interference with speakers?
A cell phone may cause a speaker to hum or buzz as data is transmitted to and from the phone. The transfer of information produces electromagnetic disturbances in the medium around the speakers, resulting in noise in the audio and, therefore, humming/buzzing in the sound outputted by the speaker.
Why do speakers make things vibrate?
When the coil moves, it pushes and pulls on the speaker cone. This vibrates the air in front of the speaker, creating sound waves. The electrical audio signal can also be interpreted as a wave.
Why do my speakers make a noise when my cell phone gets a call?
The circuit that powers your speaker acts as an antenna and "catches" the mobile phone RF communication. This interference adds onto the normal audio that your speakers are playing.
