- published: 27 Sep 2011
- views: 6966
In music, a fifteenth or double octave, abbreviated 15ma, is the interval between one musical note and another with one-quarter the wavelength or quadruple the frequency. The fourth harmonic, it is two octaves. It is referred to as a fifteenth because, in the diatonic scale, there are 15 notes between them if one counts both ends (as is customary). Two octaves (based on the Italian word for eighth) do not make a sixteenth, but a fifteenth. In other contexts, the term two octaves is likely to be used.
For example, if one note has a frequency of 400 Hz, the note a fifteenth above it is at 1600 Hz (15ma ), and the note a fifteenth below is at 100 Hz (15mb ). The ratio of frequencies of two notes a fifteenth apart is therefore 4:1.
As the fifteenth is a multiple of octaves, the human ear tends to hear both notes as being essentially "the same", as it does the octave. Like the octave, in the Western system of music notation notes a fifteenth apart are given the same name—the name of a note an octave above A is also A. However, because of the large frequency distance between the notes, it is less likely than an octave to be judged the same pitch by non-musicians. Passages in parallel fifteenths are much less common than parallel octaves. In particular, sometimes an organist will use two stops a fifteenth away (notated as 2′).
Fifteenth -Tomorrow
Pat Metheny- September fifteenth
September Fifteenth (Pat Metheny)
Swingin Utters - Fifteenth & T
The Fifteenth Amendment
The Fifteenth Amendment
Millennium - The Fifteenth Century
Fifteenth Summer Book Trailer
『考試王』 February the Fifteenth by Roger Stevens
February the Fifteenth by Roger Stevens - 英文朗誦示範 (第67屆香港學校朗誦節)
Fifteenth / She Isis
Fifteenth - Yesterday (Radio Edit)
PAT METHENY & LYLE MAYSE ~ SEPTEMBER FIFTEENTH
Shadow Of The Colossus - Fifteenth Colossus - Part 21
Howard Winstone is a legendary Welsh boxing figure that has been largely forgotten by the public of today. In the film 'The Fifteenth', his skills as a fighter are once more brought to the forefront of our imaginations, and the changing face of Wales, subtly displayed. A young boy overhears three lads remarking on an old man in the corner, that he used to be a figurehead of the boxing world. The boy inquisitively approaches and is about to question the man, when he notices the lack of fingers on the supposed boxers right hand. The boy loudly dismisses the lads claims, much to the amusement of the old man, who invites the boy to take a seat and listen to his tale. Back to the fifties we go and the training of one of the fastest and most powerful boxers of the time; Howard Winstone. The boxer working hard in one of the local factories in Merthyr suffers the agony of the loss of the tips of his fingers in a freak accident, just as he is being tipped for great things in the boxing world. The boy listens with excitement as one man's determination spans a decade of classic boxing, seeing the fighter evolve in to one of the most feared fighters in Europe and eventually the world. The poignancy in the script is drawn through the young lad, who by trying to get served alcohol at an age too young, has seen the errors of his ways by looking in to the past - a thing that we as a society seem to be doing too little these days - remembering our roots and the mistakes of our elders. The films weaves through Welsh culture and sporting achievements with passion and enthusiasm, with strong imagery and both intimate and lavish scenes; highlighting the rise and fall of one of Wales' greatest boxers.
Keywords: