[æ]’s original sound is [에]. The reason why it is heard like [아] is that its articulate point is very near [ɑ]’s. In other words, it is heard like [에]+[아]. Its pronuciation has been taught as [애] in Korea. In fact, [애](=[아]+[이]) is heard like [에]+[아]. Hoon Min Jung phonetics explained like this firstly in the world. Also, Hoon Min Jung phonetics explained about a vowel rectangle using ‘group theory’ in mathematics firstly in the world on August in 2009.
The reason why bee disappears is not because of electromagnetic wave but because of flower’s disappearing. – Bruce
Strictly speaking, the British computer, ‘Watson’ called AI computer is not AI. Because it can’t think but just process data. To create AI computer needs the support of ‘philosophy’.
The Korean language is the gate to all human languages.
Because most of it’s consonants and vowels consist of the ultimate particles of sounds. So if you know it, you can pronounce their native pronunciation very well. HMJ phonetics proves which fact very well. -Bruce
The ultimate particles of matters are energy. Energy is a wave. By the way a sound is a wave. Therefore, the ultimate particles of matters are the very ultimate particles of sounds. – In the thesis of ‘Hoon Min Jung phonetics the 2nd edition’
Hoon Min Jung phonetics unified all academies in the world first in the world. -Bruce
HMJ phonetics scientifically explained first in the world about why Korean letters, Han-Geul is the only letters in the world which can write all human languages almost accurately and Koreans can pronounce them like their native speaker can do.