據說有教科書的「天文學和航天科學」部份竟然遺漏了這效應。

I did learn that in high school,
but my teacher just stated out the formula (which is to find the observed frequency), and used emergency siren as an example
and that's it

oup出版社有略為談及doppler effect，同樣係用樓上的例子說明

其實doppler effect 不能不教吧? 公開試卷中也提供了Doppler effect的「公式」。