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"Sounding" derives from the Old English sund, meaning "swimming, water, sea"; it is not related to the word sound in the sense of noise or tones, [2] but to sound, a geographical term. Traditional terms for soundings are a source for common expressions in the English language, notably "deep six" (a sounding of 6 fathoms).
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.
A bathymetric chart is a type of isarithmic map that depicts the submerged bathymetry and physiographic features of ocean and sea bottoms. [1] Their primary purpose is to provide detailed depth contours of ocean topography as well as provide the size, shape and distribution of underwater features.
"4, 3, 2, 1" is a song by Queens rapper LL Cool J featuring Method Man, Redman, Canibus and DMX from LL Cool J's seventh album Phenomenon as the second single. It was released on December 9, 1997, for Def Jam Recordings and was produced by Erick Sermon .
Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water . It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight , along with knowledge of the speed of sound in water, allows determining the distance ...
perform "Dodges" in the 3–4 position; or perform dodges in the 5–6 positions, or sit for two blows if they are just above the treble, then go first again. The red bell track shows the order of "works", which are deviations from the plain hunt. 3/4 down dodge; 5/6 down dodge; 5/6 up dodge; 3/4 up dodge; make 2nds place. And then it repeats.
A440 Play ⓘ. 440 Hz = 4.21 or 4.39. The Bark scale is a psychoacoustical scale proposed by Eberhard Zwicker in 1961. It is named after Heinrich Barkhausen, who proposed the first subjective measurements of loudness. [1] One definition of the term is "a frequency scale on which equal distances correspond with perceptually equal distances.
Manual sounding is undertaken with a sounding line- a rope with a weight on the end. Per the Code of Federal Regulations, most steel vessels with integral tanks are required to have sounding tubes and reinforcing plates under the tubes which the weight strikes when it reaches the bottom of the tank.