| 翻訳と辞書 |
| scientific pitch notation ： ウィキペディア英語版 |
scientific pitch notation
Scientific pitch notation (or SPN, also known as ''American Standard Pitch Notation'' (ASPN) and ''International Pitch Notation'' (IPN))〔( International Pitch Notation )〕 is a method of specifying frequency by combining a musical note name (with accidental if needed) and a number identifying the pitch's octave. Scientific pitch was first proposed in 1713 by French physicist Joseph Sauveur and was defined so that all C's are integer powers of 2, with middle C (C4) at 256 Hertz. With changes in concert pitch and the widespread adoption of A 440 as a musical standard, new scientific frequency tables were published by the Acoustical Society of America in 1939, and adopted by the International Organization for Standardization in 1955; C0 is now 16.352 Hz instead of 16.
In very recent times "Scientific pitch" or "Verdi pitch" has become associated with calls to reestablish a lower musical pitch standard. Among musicians its main use is to identify a note's octave, independent of particular tuning systems.
==Octave number==
The octave number increases by 1 upon an ascension from B to C (and ''not'' from G to A, as one might expect). Thus "A4" refers to the first A ''above'' C4 (middle C). As another example, in ascending the white keys on a keyboard, C4 immediately follows B3, as in the following sequence: "C3 D3 E3 F3 G3 A3 B3 C4 D4"
Scientific pitch notation was originally designed as a companion to scientific pitch, in which C4 was defined as exactly 256 Hz. A different standard pitch system, using A4 as exactly 440 Hz, had been informally adopted by the music industry as far back as 1926, and A440 became the official international pitch standard (ISO 16.) in 1955. However, the use of scientific pitch notation to distinguish octaves does not depend on the pitch standard used (for example, A4 may be tuned to other frequencies under different tuning standards, and SPN octave designations still apply).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「scientific pitch notation」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|