The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm. Although several empirically derived standard units for expressing electrical resistance were developed in connection with early telegraphy practice, the British Association for the Advancement of Science proposed a unit derived from existing units of mass, length and time and of a convenient size for practical work as early as 1861. The definition of the ohm was revised several times. Today the definition of the ohm is expressed from the quantum Hall effect.
The ohm is defined as an electrical resistance between two points of a conductor when a constant potential difference of 1 volt, applied to these points, produces in the conductor a current of 1 ampere, the conductor not being the seat of any electromotive force.
in which the following units appear: volt (V), ampere (A), siemens (S), watt (W), second (s), farad (F), joule (J), kilogram (kg), metre (m), and coulomb (C).
OHM (sometimes stylized Ohm: or OHM:) is an American instrumental rock/jazz fusion group fronted by former Megadeth guitarist Chris Poland. The band was formed in 2002 and has released three studio albums and a live album. A similar offshoot band named OHMphrey, also fronted by Poland, was formed in 2008.
The band often perform at the Baked Potato jazz club in Studio City, California.
Ohm (Ω) refers to the SI unit of electrical resistance named after Georg Ohm.
Ohm may also refer to:
OHM may refer to:
Rumble or Rumbling may refer to:
A rumble is a continuous deep, resonant sound, such as the sound made by heavy vehicles or thunder. In the context of audio reproduction rumble refers to a low frequency sound from the bearings inside a turntable. This is most noticeable in low quality turntables with ball bearings. Higher quality turntables use slide bearings, minimizing rumble.
Some phono pre-amplifiers implement a rumble filter, in an attempt to remove the noise. A heavier platter can also help dampen this.
Rumble measurement is carried out on turntables (for vinyl recordings) which tend to generate very low frequency noise originating from the centre bearing and from drive pulleys or belts, as well as from irregularities in the record disc itself.
It can be heard as low-frequency noise and becomes a serious problem when playing records on audio systems with a good low-frequency response. Even when not audible, rumble can cause intermodulation, modulating of the amplitude of other frequencies. The ‘unweighted’ response curve is intended for use in assessing the level of inaudible rumble with such intermodulation in mind.
"Rumble" is an instrumental by Link Wray & His Ray Men. Originally released in April 1958 as a single with "The Swag" as a B-side and recorded in 1954, "Rumble" utilized the techniques of distortion and feedback, then largely unexplored in rock and roll. The piece is one of very few instrumental singles banned from the radio airwaves. It is also one of the first tunes to use the power chord, the "major modus operandi of [the] modern rock guitarist".
At a live gig in Fredericksburg, Virginia, attempting to work up a backing for The Diamonds' "The Stroll," Link Wray & His Ray Men came up with the stately, powerful instrumental "Rumble," which they originally called "Oddball." The instrumental was an instant hit with the live audience, which demanded four repeats that night.
Eventually the instrumental came to the attention of record producer Archie Bleyer of Cadence Records, who hated it, particularly after Wray poked holes in his amplifier's speakers to make the recording sound more like the live version; however, Bleyer's stepdaughter loved it and it was released despite his protest. Phil Everly heard it and suggested the title "Rumble", as it had a rough sound and said it sounded like a street fight.