V2EX perfect fifth

Perfect Fifth

释义 Definition

完全五度(音乐术语):一种音程,指两个音相隔五个音级,在十二平均律中通常等于7个半音;在纯律中常对应频率比3:2。它属于“完全音程”(perfect interval)家族,听感稳定、和谐,常用于和声与调式构建。

发音 Pronunciation (IPA)

/pfkt ffθ/

例句 Examples

A perfect fifth above C is G.
C上方的一个完全五度是G。

The composer builds tension by moving the melody in parallel perfect fifths before resolving to a fuller harmony.
作曲家让旋律以平行完全五度推进来制造张力,随后再解决到更丰满的和声。

词源 Etymology

fifth 来自“第五(个)”的概念,指音阶中的第五级关系;perfect 在音乐理论里并非“完美”的日常含义,而是指一类被传统理论认为最稳定、最协和的音程类型(如完全一度、完全四度、完全五度、完全八度)。因此 perfect fifth 直译为“完全的五度音程”。

相关词 Related Words

文学与著作 Literary Works

  • Tonal Harmony(Stefan Kostka & Dorothy Payne)在音程与和声章节中系统讨论完全五度的功能与避免“平行五度”等写作规范。
  • The Study of Orchestration(Samuel Adler)在配器与声部进行的语境中提及完全五度的音响特性与写作注意点。
  • Gdel, Escher, Bach: An Eternal Golden Braid(Douglas Hofstadter,《哥德尔、艾舍尔、巴赫》)在谈到音乐结构与对位时,会涉及“fifth/五度”等音程概念(含完全五度的讨论脉络)。
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