frequency range - definition. What is frequency range
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  3. frequency range

%ما هو (من)٪ 1 - تعريف

RANGE OF FREQUENCIES THAT CAN BE HEARD BY HUMANS OR OTHER ANIMALS
High frequency limit; Hearing Range; Range of human hearing; Animal hearing; High Frequency Limits; Human hearing range; Audible range; Sound for humans; Pitch perception; Human audible range; High-frequency limit
  • pinnae]]) of a cat
  • Human hearing area in frequency and intensity. Dashed line describes possible changes due to excessive hearing strain (e.g. loud music).
  • Dolphins
  • An audiogram showing typical hearing variation from a standardized norm.

Range–frequency theory         
THEORY IN COGNITIVE PSYCHOLOGY
User:Averkucla/sandbox; Range-Frequency Theory; Range-frequency theory
The range–frequency compromise in judgment is a theory in cognitive psychology developed by Allen Parducci in the mid-1960s. Range–frequency is descriptive of how judgments reflect a compromise between a range principle that assigns each category to an equal subrange of contextual stimuli and a frequency principle that assigns each of the categories to the same number of contextual stimuli.
https://en.wikipedia.org/wiki/Range–frequency_theory
Low-frequency radio range         
  • alt=Map showing primarily four thick lines emanating from a center point into four directions, defining four quadrants; the upper and lower quadrants are marked with the letter 'N' and the left and right ones with 'A'; each letter is followed by its Morse code; also, there is a digit "1" in the top quadrant, "2" in the left, and "3" on the line separating the bottom and left quadrants
  • Doolittle's instrument panel
  • alt=Diagram showing large central circle; four lines go out from a central point forming four quadrants, marked with letters A and N; at the bottom right corner, there is a separate small diagram with two thick black intersecting lines (depicting runways); an arrow points to the longer line (runway) with the words: "From range to airport 3.2 miles, 126 degrees"
  • Diagram showing low-frequency radio [[holding pattern]]s.
  • Early low-frequency radio station based on crossed loop antennas; later installations used [[Adcock antenna]]s for improved performance.
  • alt=Aerial view of five tall [[Adcock antenna]] towers standing on flat terrain; four are arranged in a square, and the fifth one is at the center
  • The vibrating reed, developed in the 1920s, was a simple, panel-mounted instrument with "turn left-right" indicator.
  • alt=White diagram with four blue lines emanating from center defining four quadrants; a little green airplane is positioned at the bottom right, on top of the blue line separating the A and N quadrants
  • alt=White diagram with four blue lines emanating from center defining four quadrants; a little green airplane is positioned at the bottom right, just off the blue line, slightly inside the A quadrant above it
  • alt=White diagram with four blue lines emanating from center defining four quadrants; a little green airplane is positioned on the left side, inside the "A" quadrant
  • alt=White diagram with four blue lines emanating from center defining four quadrants; a little green airplane is positioned on the top, inside the "N" quadrant
  • instrument flying]] is feasible.
  • alt=Tall antenna tower on a background of twilight clear sky; small shack is at bottom of tower
  • alt=A thin up-pointing white cone with a cylindrical tip, a few meters tall, sits atop an elevated concrete platform, seen against clear blue sky; it is surrounded by a circle of about a dozen small picket-like vertical antennas
NAVIGATION SYSTEM FORMERLY USED BY AIRCRAFT
Radio range; Four course range; Lfrr; Low Frequency Radio Range; Four Course Radio Range; Four-course radio range; LF/MF Four-Course Radio Range; Flying the beam; Four-course radio range station; L/MF four-course radio range; Low frequency radio range; Low Frequency radio range; Cone of silence (navigation)
The low-frequency radio range, also known as the four-course radio range, LF/MF four-course radio range, A-N radio range, Adcock radio range, or commonly "the range", was the main navigation system used by aircraft for instrument flying in the 1930s and 1940s, until the advent of the VHF omnidirectional range (VOR), beginning in the late 1940s. It was used for en route navigation as well as instrument approaches and holds.
https://en.wikipedia.org/wiki/Low-frequency_radio_range
Frequencies         
  • Diagram of the relationship between the different types of frequency and other wave properties.
  • Complete spectrum of [[electromagnetic radiation]] with the visible portion highlighted
  • Modern frequency counter
  • Hz]]
  • The [[sound wave]] spectrum, with rough guide of some applications
NUMBER OF OCCURRENCES OR CYCLES PER TIME
Wave period; Frequencies; Period (physics); Frequency (wave motion); Frequency dependence; Oscillation frequency; Frekvens; Periodic time; Frequency measurement; Period (frequency); Temporal frequency; Repetition frequency; Occurrence frequency; Event frequency; Oscillation rate; Repetition rate; Occurrence rate; Event rate; Rate of occurrence; Rate of repetition; Rate of oscillation; Wave frequency; Ordinary frequency; Aperiodic frequency
·pl of Frequency.

ويكيبيديا

Hearing range

Hearing range describes the range of frequencies that can be heard by humans or other animals, though it can also refer to the range of levels. The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high frequencies, and a gradual loss of sensitivity to higher frequencies with age is considered normal. Sensitivity also varies with frequency, as shown by equal-loudness contours. Routine investigation for hearing loss usually involves an audiogram which shows threshold levels relative to a normal.

Several animal species are able to hear frequencies well beyond the human hearing range. Some dolphins and bats, for example, can hear frequencies over 100 kHz. Elephants can hear sounds at 14–16 Hz, while some whales can hear infrasonic sounds as low as 7 Hz.

https://en.wikipedia.org/wiki/Hearing range
أمثلة من مجموعة نصية لـ٪ 1
1. The solar flare created radio bursts that traveled to the Earth, covering a broad frequency range, the researchers said, affecting GPS and other navigational systems.
2. "Frequencies associated with the magnetic field are in the same frequency range as human biological systems," he said by telephone from his clinic.
3. Israel had delayed its approval of the frequency range for some time, among other reasons, because of objections from the Shin Bet security service and the army.
4. They are studied by scientists thanks to their acute hearing which, in its frequency range is almost identical to that of humans.
5. On the economic front, Blair announced yesterday at a press conference in Jerusalem that Israel has agreed to allocate a frequency range that would enable a second Palestinian cell–phone operator.
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