choir members in your pipes
Mixers are complex pieces of equipment and mains hum can be induced from a variety of sources. In many cases, it is due to earth loops or other earth issues. In some cases, a power supply may give rise to noise on the outputs. Ferrite cores clipped to a cable are unlikely to make any difference to the hum. Get the connections right and the hum will probably disappear.
motor is single phaseing
Bob told me that the acoustic stirling engines run when you hum to them. No seriously, it's true since Bob told me it was.
1. THE INSULATION IS DETERIORATING 2. LOOSE TERMINATIONS 3. NO RUBBER FOOTING INSTALLED 4. OVERLOADING / UNBALANCED LOADING 5. Magnetostriction. When the core becomes magnetised, it expands, then it contracts and expands again as the field is reversed. A 50Hz transformer therefore expands and contracts at 100Hz, producing a sound at that frequency.
Different names for the same thing. Depending on who you're talking to, they may use one or the other. A capacitor can be used to remove high frequency noise (in IC's this is usually switching noise); it can be used to remove low frequency noise also (such as for sound equipment - 60 Hz hum).Bypass simply means power is being shunted around specific equipment (alternatively, filtering the input to certain equipment).
There are a number of reasons why pipes might hum when they are turned on. A washer could be worn out and not working correctly. The fill valve on one of the toilets may not be working properly, or it could be your water pressure.
Probably wheel bearings or wheels are unbalanced
There may be three possible causes of fuel pump hum on a Ford Escape. These are the exhaust leak, wheel bearing, or a bad tire.
Common causes of guitar hum include electromagnetic interference from electronic devices, poor grounding, and faulty cables. To minimize or eliminate guitar hum, you can use shielded cables, ensure proper grounding of your equipment, and avoid placing your guitar near sources of electromagnetic interference.
A bad radio speaker
Power lines hum due to the vibration of the electrical current running through them, which creates a magnetic field that causes the wires to vibrate and produce a low-frequency sound.
induced currents,usually caused by damp weather wet etc
Common causes of guitar amp hum include improper grounding, electromagnetic interference, and faulty cables. To reduce or eliminate the hum, ensure proper grounding of the amp, use high-quality shielded cables, keep the amp away from sources of electromagnetic interference, and consider using a power conditioner or noise gate.
might want to check your drums
This arrangement reduces hum - much like when both pickups on the jazz bass are turned on.
Typically-no. What causes the pipes to vibrate and hum is when the flow rate at a fixtures or hose bibb is just right, it hits the harmonic point on the pipe, causing it to vibrate. You can test this by throttling a valve slowly, until the vibration starts. Opening it further or closing it will stop the noise. This vibration could over time cause a loose joint, then a leak. === === === === === === === ===
Goldfrapp - Ooh La La