EHV and VHV substations tend to have a signature hum; this is due to small electrical arcs. This is normal. Most of the time this will not be audible on VHV and EHV power lines. If you are hearing this from the power line, it could be bad and the utility may want to know. It shouldn't be a risk to you, however the hum may be resulting from arcing, which can be fairly high frequency, which can mess with electronics's signals such as cell phones and radio (won't damage them, just bad reception).
Decrease pressure to prevent excessive velocity
An isolation transformer (or more commonly, amplifier) reduces noise in the system from the power source. This is especially necessary in medical applications where the signals that are being read are very tiny and even a small amount of noise can disrupt a signal and make it unreadable.
noise do not occurs in positive terminals noise like all signals must have a return to be seen as evidence
Skin effect is a physical effect that operates on thick conductors. In a transformer the conductors are usually too thin for any substantial skin effect to occur.
It doesn't. It exists in all electrical machines, d.c. or a.c., motor, generator, or transformer.
Madagascan hissing cockroaches make a noise by forcing air out of a special hole.
when you breath is air and force it out with your tongue it makes the hissing noise
making a hissing noise
A hole in the chest ... the hissing comes from the leaking air.
A hissing noise
Yes. They make grunting-hissing noises.
Possums make a variety of hissing and snorting noises.
The hissing sound of the blue flame on a Bunsen burner is due to the rapid movement of gas molecules as they mix with air and combust. This turbulence creates vibrations and generates sound waves, resulting in the hissing noise.
Decrease pressure to prevent excessive velocity
Sheep do bleat and snake make a hissing noise.
Signs of your battery exploding can be swelling overheating and a hissing noise
Vacuum hose leaking.