Listen and learn as famed phonetician Daniel Jones narrates the 18 Cardinal Vowels. These phonetic reference points are necessary to master the IPA vowel system. Because you probably woke up this morning saying "Hey, I should probably master the IPA vowel system."
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Akira Utsugi's web site (宇都木昭研究室) - 音声学の参考ウェブサイト
articulatory system
The Cardinal Vowels with Daniel Jones
https://www.coelang.tufs.ac.jp/ipa/index.htm
IPA Help 2.1 - SIL Language Technology