http://qezqo7c2mvdk2ml2ys626hlh7ezva75wwwoawcuc7xncp37kedumv2ad.onion/index.php/International_Phonetic_Alphabet
As it was suggested from the Middle Korean spelling, the tense consonants came from the initial consonant clusters sC-, pC-, psC-.[2][3]:29, 38, 452 The aspirated segments are characterized by aspiration, a burst of air accompanied by the delayed onset of voicing. Also, the "plain" segments are distinguished from the tense and aspirated phonemes by changes in vowel quality, including a relatively lower pitch of the following vowel.