The noise is mainly reflected in the car audio, that is, there is an audio interference, like the whistling sound, the frequency of this noise will change with the engine speed.
This product is an audio common ground isolator, which effectively suppresses the noise caused by the common ground for the sound source and the receiving device.
Because the grounding points of the two devices are different, it is possible to generate common ground noise.
So what is the common ground? To put it simply, the ground point of the two electrical appliances is not at the same point. Due to the difference in grounding resistance, noise is transmitted into the electrical equipment through the ground wire to form interference.
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