60Hz hum is a low-frequency noise that is caused by the alternating current (AC) power that is used in most homes and businesses. The frequency of 60Hz hum is determined by the frequency of the AC power, which is 60 cycles per second in the United States and Canada.
60Hz hum can be caused by a variety of things, including:
- Power lines: Power lines emit a magnetic field that can induce a current in nearby conductors. This current can create a 60Hz hum in audio equipment.
- Electronic devices: Other electronic devices, such as computers and televisions, can also emit a 60Hz hum. This is because they use AC power to operate.
- Ground loops: Ground loops can occur when there are multiple devices connected to the same power outlet. This can create a loop of electricity that can cause a hum.
- Improper grounding: If the audio equipment is not properly grounded, it can pick up noise from the power lines.
- Poorly shielded cables: Cables that are not properly shielded can pick up noise from the power lines.
If you are experiencing 60Hz hum, there are a few things you can do to try to fix the problem:
- Check the power lines: Make sure that the power lines are not running near the audio equipment.
- Move the audio equipment away from other electronic devices: If possible, move the audio equipment away from other electronic devices that may be emitting a hum.
- Check for ground loops: Use a ground loop isolator to break the loop of electricity that is causing the hum.
- Have the audio equipment grounded: If the audio equipment is not properly grounded, have it grounded by a qualified technician.
- Use shielded cables: Use cables that are properly shielded to reduce the amount of noise that is picked up.
By following these tips, you can help to reduce or eliminate 60Hz hum from your audio equipment.
Here are some additional things to keep in mind about 60Hz hum:
- 60Hz hum is most noticeable in audio equipment that is sensitive to low-frequency noise. This includes turntables, phono preamps, and amplifiers.
- 60Hz hum can be difficult to eliminate completely. However, by following the tips above, you can reduce the amount of hum that is audible.
If you are experiencing 60Hz hum, it is important to try to identify the source of the noise. Once you have identified the source, you can take steps to reduce or eliminate the hum.