Why is there noise in car audio?
2 Answers
Car audio has a buzzing sound, the reasons and solutions are as follows: 1. Poor contact of the audio cable. Check the audio cable to see if it is properly connected. Because the audio cable is most susceptible to current interference. 2. The ground wire is too long. Check the ground wire to see if it is too long (it is recommended that the ground wire be about 0.5 meters). Because the ground wire current is relatively weak, if it is too long, it is easy to produce noise. Regardless of whether the grounding surface is good or not, the ground wire must be polished and cleaned when connecting to the frame screw position, otherwise poor contact will cause current interference noise. 3. The power cable and audio cable are not routed separately. Check whether the 12V power cable and audio cable are routed separately. Because some car modification and car beauty shop workers will connect the power cable and audio cable together, which will produce current interference noise. 4. Software issues. The buzzing sound in the audio caused by software reasons, such as differences in music formats or noise introduced during recording, can be solved by trying to play music in different formats.
That day I was listening to music in the car when suddenly the speakers started crackling. This is most likely due to loose wiring—check if the plugs behind the audio system are securely connected. If the audio system has been modified, poor cable routing during installation can cause interference if it touches metal parts. I’ve also noticed that sometimes when connecting a phone via Bluetooth, there’s static noise—try turning off other Bluetooth devices. Humid weather can also cause oxidation on the audio connectors; cleaning the metal contacts with a cotton swab dipped in alcohol can help a lot. If all else fails, you’ll need to visit a tuning shop to have the circuit checked with professional equipment—it might be that the amplifier module is burnt out. Factory audio systems are particularly sensitive to unstable voltage.
