Legend: γ = Gamma ray s HX = Hard X-ray s SX = Soft X-Rays EUV = Extreme-ultraviolet NUV = Near-ultraviolet Visible light ( colored bands ) NIR = Near-infrared MIR = Moderate-infrared FIR = Far-infrared EHF = Extremely high frequency ( microwaves ) SHF = Super-high frequency ( microwaves ) UHF = Ultrahigh frequency ( radio waves ) VHF = Very high frequency ( radio ) HF = High frequency ( radio ) MF = Medium frequency ( radio ) LF = Low frequency ( radio ) VLF = Very low frequency ( radio ) VF = Voice frequency ULF = Ultra-low frequency ( radio ) SLF = Super-low frequency ( radio ) ELF = Extremely low frequency ( radio )

Low frequency inductors are constructed like transformers, with cores of electrical steel laminated to prevent eddy currents.

Low frequency induction is an unwanted form of inductive coupling, which can occur when a metallic pipeline is installed parallel to a high-voltage power line.

; Conducted immunity: Low frequency signals ( usually 10 kHz to 80 MHz ) are injected onto the data and power lines of a device.

Low fidelity or lo-fi describes a sound recording which contains technical flaws such as distortion, hum, or background noise, or limited frequency response.

Low frequency or low freq or LF refers to radio frequencies ( RF ) in the range of 30 kHz – 300 kHz.

Low frequency waves can also travel long distances by reflecting from the ionosphere ( the actual mechanism is one of refraction ), although this method, called skywave or " skip " propagation, is not as common as at higher frequencies.

nl: Low frequency

fi: Low frequency

* Low frequency

A modern Low frequency | LF Radio clock

A low cost Low frequency | LF radio clock receiver, antenna left, receiver right.

* Low frequency, ( LF )

Low frequency parasitic oscillations have been called ' motorboating ' due to the similarity to the sound of a low-revving exhaust note.

Low phosphorus content is vital for these coals, as phosphorus is a highly deleterious ( damaging ) element in steel making.

Apart from some of the clergy who had studied at the universities and cathedral schools in Paris or in Cologne, there were few scholars in the land ; even amongst the higher clergy there were many who were ignorant of the scientific study of Latin, and the ordinary burgher of the Dutch cities was quite content if, when his children left school, they were able to read and write the Medieval Low German and Diets.

Low content wolfdogs rarely have these problems any more strongly or significantly than any other large breed dog.

This engine must run on Ultra Low Sulfur Diesel ( ULSD ) fuel which has no more than 15 ppm sulfur content ; using regular diesel fuel will result in emission equipment malfunctions and violate manufacturer warranties.

Low silicon content is indicative of mafic and ultramafic igneous rocks, such as basalt and dunite.

" Low lime " or Class F fly ash is well suited for use in high fly ash content mixes, but can also be used in low fly ash content mixes.

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the Low Countries, where the Middle Ages were to last for another two centuries and die out only when Charles the Bold of Burgundy met his first defeat in the fields and forests below the walls of Grandson.

* In November 2000, nuclear spin temperatures below 100 pK were reported for an experiment at the Helsinki University of Technology's Low Temperature Lab.

Low numbers ( below 31 and especially below 12 ) are popular because people play birthdays as their so-called lucky numbers ; hence a win in which these numbers are over-represented is more likely to result in a shared payout.

Low concentrations of HDL ( below 40 mg / dL for men, below 50 mg / dL for women ) increase the risk for atherosclerotic diseases.

When the water level is below both switches, the switch contacts are closed providing signals to both the " Low Level " and " High Level " inputs to the PLC.

Winters in Show Low bring highs between 45 ° F ( 7 ° C ) and 55 ° F ( 13 ° C ), with lows usually below freezing between November and March, averaging in the 20s December through February, and in the low 30s for November and March.

Low blood glucose ( below 60 mg / dl ) also stimulates secretion of growth hormone, and growth hormone, it is presumed, helps to strengthen the immune system.

SSSI notification can cover any " land " within the area of the conservation body, including dry land, land covered by freshwater, and land covered by the sea at high tide — but not the sea below Mean Low Water.

The town lies just below the southern limit of sporadic permafrost in Alaska, and is strongly sheltered from the extremely wet Aleutian Low which drops most of its moisture on the opposite side of the mountains.

Low speeds below 20 mph have a significantly higher coefficient of pollutant production than above 30, though the coefficient after levelling off tends to increase gradually after 50 mph.

Low fire clays, fired below 1200 ° C, most often used by large commercial manufacturers and third world producers, while durable, are susceptible to scratching and wear over time.

* Low serum ferritin * see below

The ASX responded with the Low Exercise Price Option or LEPO ( see below ).

Low air flow alarm control panels are common, see below.

The river sweeps round to the south to join the River Don just below Mexborough Low Lock, where Mexborough New Cut on the River Don Navigation rejoins the river.

Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s.

The most common low whistle is the " Low D ", pitched one octave below the traditional D whistle.

With detection poor below, Chain Home Low stations were placed between Chain Home stations to detect aircraft down to but only out to from the coast, about one third the range of Chain Home.

Low temperatures during winter nights can be exceedingly cold, with many night temperatures dropping below zero in the winter.

One feature that does distinguish Low German from English generally is final devoicing of obstruents, as exemplified by the words ' good ' and ' wind ' below.

The table below shows the relationship between English and Low German consonants which were unaffected by this chain shift and gives the modern German counterparts, which were affected by the sound shift.

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