The sound of current sizzling in wired headphones is usually caused by a variety of factors, including problems with the headset wiring, the quality of the audio source file, the grounding of the device, and ambient electromagnetic interference.

     First of all, the problem of the headset line itself may be one of the main reasons for the current sound. If the wiring of the headset is aged, broken, or in poor contact, it is possible to generate additional current noise when transmitting audio signals. For example, folding or twisting the headphone cable too often can cause damage to the internal wiring, which in turn can cause a sizzling electrical sound.

     Secondly, the quality of the audio source file will also affect the sound performance of the headset. If the audio file itself has noise or coding issues, these issues may be amplified when played through headphones, showing up as a noticeable electrical sound. For example, some low-quality MP3 files may lose audio information during compression, and are prone to noise when played.

     In addition, poor grounding of the device is also a common cause of current sound in the headset. When the audio device has a poor or missing ground line, the current may not return correctly, resulting in a sizzling noise. This is especially true when using some portable audio devices or computers, which may not be as well grounded as professional audio equipment.

     Finally, electromagnetic interference in the surrounding environment can also have an impact on the sound of headphones. For example, when headphones are used near strong electromagnetic fields (such as high-voltage power lines, radio towers, etc.), or when multiple electronic devices are turned on at the same time, the headphones may pick up the electromagnetic signals of these devices, resulting in a sizzling current sound.

     In summary, the sound of current sizzling in wired headphones may be the result of a variety of internal and external factors. In order to solve this problem, users can try to replace the headphone line, improve the quality of the audio source file, improve the grounding of the device, and reduce the electromagnetic interference of the surrounding environment.