base pitch measurement

例句：

1. 1.The base pitch measurement of the song is crucial for understanding its structure.
   这首歌的基础音调测量对于理解其结构至关重要。
2. 2. In music, a base pitch measurement can help determine the key of a piece.
   在音乐中，一个基础音调测量可以帮助确定作品的调性。
3. 3.Researchers use base pitch measurements to study the effects of different vocal techniques on performance.
   研究人员使用基础音调测量来研究不同的歌唱技巧对表演效果的影响。