Diphthong: IPA Vowels Symbol and Sounds Hand Notes Al Mamun ๐ฐ๐ท๐จ ๐ฝ๐๐๐๐๐ ๐บ๐๐๐๐๐ ๐๐๐ ๐บ๐๐๐๐ . A Hand Note by Rosa Erick