If there is no noise in the sound heard from the headphones at this time, you can confirm that the noise of the car equipment is caused by the common ground. Use headphones to connect with car MP3 and car navigation 3.5mm interface. Determine Whether the Noise is Caused by Common Ground: 1. Therefore, this product can only eliminate the noise and current noise caused by the common electric and common ground products, but cannot eliminate the noise caused by other reasons, so you need to personally confirm the source of the noise. In the car audio, there is a kind of audio interference, like a whistle sound, the frequency of this noise will change with the engine speed. Because the grounding points of the two devices are different, common ground noise may be generated. Due to the difference in grounding resistance, noise is transmitted into the electrical equipment through the ground wire, causing interference. To put it simply, common ground means that the grounding points of two electrical appliances are not at the same point. What is a common ground? This product is an audio common ground isolator, which is effective for the noise caused by the common ground of the audio source and the receiving device. 53 x 32mm / 2.1 x 1.3in Here are Some Common Sense of Noise and Common Ground: Audio isolation transformer is a transformer used for audio signal transmission between systems or equipment, which can avoid some problems caused by cascading audio systems and realize the safe transmission of audio signals. Stereo Audio Isolator, Stable Common Ground Noise Isolation Modules Lossless Output Compact Size XH-M372 High Sensitivity for Small Cars for Indoor Devices Specification: Item Type: Isolation Module Material: Resin Model: XH-M372 Input/Output: 3.5MM headphone jack Size: Approx.
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