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The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...
The mel scale (after the word melody) [1] is a perceptual scale of pitches judged by listeners to be equal in distance from one another. The reference point between this scale and normal frequency measurement is defined by assigning a perceptual pitch of 1000 mels to a 1000 Hz tone, 40 dB above the listener's threshold.
United States military pay is money paid to members of the United States Armed Forces.The amount of pay varies according to the member's rank, time in the military, location duty assignment, and by some special skills the member may have.
The Quigley scale is a descriptive, visual system of phenotypic grading that defines seven classes between "fully masculinized" and "fully feminized" genitalia. It was proposed by pediatric endocrinologist Charmian A. Quigley et al. in 1995. [ 1 ]
The salary of the three-tier Professors with Academic Grade Pay (AGP) has been fixed by the 7th Pay Commission of 2016. Assistant Professor: Rs 57,700-211,500 (Pay level 12, Cell 1), total amount: Rs 101,500/- per month [ 4 ]
The Kardashev scale can be a relevant tool for preventing catastrophes, whether human or natural, according to Richard Wilson, who relates this scale to the power of destruction, in TNT. A Type I civilization would use 25 megatons of equivalent TNT per second, a Type II civilization 4 × 10 9 times more (4 billion hydrogen bombs per second ...
Diatonic scale in the chromatic circle. Scales are typically listed from low to high pitch. Most scales are octave-repeating, meaning their pattern of notes is the same in every octave (the Bohlen–Pierce scale is one exception).
[123] [124] In 1993, MTA started testing the MetroCard, a magnetic stripe card that would replace the tokens used to pay fares. [125] By 1997, the entire bus and subway system accepted MetroCard, [126] and tokens were no longer accepted for fare payment in 2003. [123] [124] A different fare payment system is used on the LIRR and Metro-North.