The speaker does pronounce the last t. I can hear it.
Unlike in English, consonants in Vietnamese are less-aspirated. Especially when stops /p, t, k/ (represented by letters p, t, c/ch) occur at the end of words, they're almost non-aspirated. So it may be quite difficult for you to hear those sounds.
Maybe nearly like that. Its standard sound is [mot̚˧ˀ˨ʔ]. Note that in Vietnamese, the pronunciation of a tone lasts along the word, not only on main vowel or one of the other parts of the word. When you pronounce nặng tone, you start with a little bit falling voice, then make a glottal stop on main vowel, then go falling lower a bit and make a stop on final consonant. If you can pronounce tones well, you can notice that this tone is pronounced very fast. And yep, it's the shortest tone comparing to the others.
Besides nặng tone, ngã tone also has a glottal stop in the middle of its pronunciation, e.g: ngã [ŋa˧ˀ˥]. To pronounce this tone, you start with a little bit raising voice, then make a glottal stop on main vowel. But unlike nặng tone (quickly falling lower after the glottal stop on the main vowel and then suddenly stop at the end of the word), it continues to go raising after the glottal stop. However, the glottal stop of this tone is more clear than that of nặng tone.
In my opinion, these two tones may be the hardest among the other tones for beginners to pronounce. Hope this could help you.
You can also refer this article on Wikipedia for more information (click here). Remember to practice listening, too ;)
Thank you! :)
Yes, I've been reading that Wikipedia article and often look up pronunciations on Wiktionary too. It's very helpful. But it's puzzling me that the transcription on Wiktionary contains even two glottal stops, one slighter one inside the vowel / tone contour, and one after the final consonant. So if I understand it correctly, it should be something like this (ignoring the tonal contour for a moment): [mŏˀŏt̚ʔ], two parts of an [o]-vowel with a short break inbetween, and sort of another full glottal stop after(?) the unreleased final [t]. To me the word just sounds like [mòt̚], which would simply be mồt.
Maybe I should sit down with a Vietnamese speaker and listen very very carefully. :)