The first common type of "electrical noise" is the hissing sound coming from the speakers.

This "electrical noise", characterized as a hissing sound from speakers, is a common issue referred to as the baseline noise in audio systems. This noise is intrinsically linked to the quality of the audio equipment. High-quality systems typically produce less of this noise, while cheaper, lower-quality systems may emit a more noticeable hissing sound.

This baseline noise becomes more pronounced as the volume level increases. As you turn up the volume, the baseline noise also gets amplified, making it more distinct and potentially disruptive to the listening experience.

A common misconception about this issue is that it can be mitigated through adjustments to the audio systems settings. However, this is not the case. The baseline noise is inherent to the systems quality, so In dealing with this issue, options are limited. Users can either tolerate the noise or replace the audio system equipment.

The second common type of "electrical noise" is the unstable noise that fluctuates in volume or occurs intermittently.

This noise is mainly caused by electromagnetic interference during signal transmission, which means there is poor shielding.

There are two main reasons for this situation. First, it could be due to poor quality signal cables with inadequate shielding density, resulting in interference and noise. In this case, replacing the cables with higher quality ones is required. Second, it could be caused by high-impedance unbalanced signals, such as those from electric guitars or electric basses. When these signals are transmitted over a distance longer than 10 meters, they are prone to interference and noise.

To address this, a DI box should be added on the end closer to the signal source to convert the high-impedance unbalanced signal to a low-impedance balanced signal before connecting it to the mixing console.

The third most common type of "electrical noise" is a strong humming noise known as Hum noise.

This noise occurs when the grounding points of two audio devices are not at the same point.

Due to the difference in wiring resistance, the noise enters the audio devices through the ground wire, causing interference and noise. We call this common ground noise. This noise often appears in car audio systems, home speakers, radio stations, and recording studios.

To solve this problem, you can connect the FMUSER audio ground isolation device between the audio devices.

The principle of the audio ground isolation device is to use an isolation transformer to cut off the direct connection of the ground wire in the audio line, thus avoiding the occurrence of common ground noise.

Connected between two stereo systems

Connected between the PC and the audio amplifier

Connected between the Car DSP Amplifier and the speaker