The most effective way to teach English pronunciation (in my opinion)

Many years ago, while I was searching the net for effective methods in teaching pronunciation, I discovered a wonderful app called "Sounds" and downloaded it from the app store. 

This app has a chart with phonetic symbols that make sounds when touched individually. 

After playing with it for a while, I started to think how I would be able to use it in my lessons. As many people know, the Japanese are notorious when it comes to English pronunciation; this is due to the drastic differences between the 2 languages. One example is that although the English alphabet has its own individual sounds, combining vowels and consonants will produce different sounds; this means sounds in English has no simple pattern. For example, in American accent, the alphabet "A" can sound "æ" as in "apple", "eɪ" as in "make", "e" as in "air", "ɑː" as in "father", and "ǝ" as in "sugar". In Japanese language, it is very simplified. あ or ア, the equivalent of "A" in English has only one sound - "ʌ" as in "cut". 

American English Phonetic Chart

That's why many Japanese pronounce "cat" (kæt) as "cut" (kʌt). In fact, the Japanese vowel sounds consist only of 5, whereas in English, there are "16 for American" and "20 for British"! 

This makes it very confusing for Japanese (and other non-English speakers). 

Within the app, I found a link to a YouTube video showing a British phonologists named Adrian Underhill giving a 1-hour pronunciation workshop to English teachers from different nations. This completely opened my eyes and gave me a different perspective towards teaching pronunciation. His method is focused on feeling through "muscle movement" (tongue, lips, jaw, and vocal cords) and visual learning or being able to "see sounds" (trust me on this). I believe his method of teaching pronunciation is effective and revolutionary compared with the typical "repeat-after-me" method. 

Link to Adrian Underhill's pronunciation workshop video: https://youtu.be/1kAPHyHd7Lo

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