In general, this configuration will be more resistant to noise (particularly mains hum).

And there are mains hums and background noises which could not be suppressed.

The equal common-mode mains hum interference cancels, while the string variation signal sums.

As with "Real Love", a 60-cycle mains hum can be heard throughout Lennon's demo recording.

Using sheath current filters, ground loops causing mains hum and high frequency common-mode signals can be prevented.

The search for an acceptable solution to mains hum gained new impetus around 1995 as guitar players became increasingly intolerant of degraded stacked single-coil sound.

Being the best at the time, Fender installed Lace Sensors on the Strat Plus model for many years as a solution to the mains hum problem.

These have a very different sound, and also have the advantage of not picking up any other magnetic fields, such as mains hum and feedback from monitoring loops.

DiMarzio, Seymour Duncan and EMG manufacture what are commonly known as stacks, or stacked single coils which cancel mains hum.

However, with the sticky label approach and the possibly dangerous method of fitting the power supply-the mains hum will affect the picture quality if nothing else happens-the unit slips into the second rank.

In effect the mains hum signal is treated as if it were a time-dependent digital watermark that can help identify when the recording was created, and help detect any edits in the recording.

For instance, in 1957, Gibson introduced the humbucker (PAF), which revolutionized the sound of the electric guitar, and eliminated the mains hum, which had previously plagued guitars with single coil magnetic pickups.

However, wire coils also make excellent antennae and are therefore sensitive to electromagnetic interference caused by alternating magnetic fields from mains wiring (mains hum) and electrical appliances like transformers, motors, and computer screens.

Apart from generating noticeable hiss, 741s and other older op-amps may have poor common-mode rejection ratios and so will often introduce cable-borne mains hum and other common-mode interference, such as switch 'clicks', into sensitive equipment.

Fender Stratocaster and Telecaster pickups as well as Gibson's P-90 pickup being of the single-coil type, output a type of noise known as mains hum or 50Hz / 60Hz hum.

There was no sound except for the steady mains hum of the computer, but when she came within range of the port-hole in the side of the tank the creature began to move about, thumping against the tank walls and slopping Quid out of the open top.

One drawback of the P-90 pickup is its susceptibility to 50 Hz / 60 Hz mains hum induced in its coil by external electro-magnetic fields originating in mains powered electrical appliances, motors, lighting ballasts and transformers, etc.

Magnetic flux in a ferromagnetic material, such as the core, causes it to physically expand and contract slightly with each cycle of the magnetic field, an effect known as magnetostriction, the frictional energy of which produces an audible noise known as mains hum or transformer hum.

Classic single coil pickups (in contrast to modern, noiseless single coil designs) also act like an antenna and are prone to pick up mains hum (nuisance electromagnetic interference generated by electrical power cables, power transformers, and fluorescent light ballasts in the area) along with the musical signal.