Consonants

Note: The letters in blocks represent the symbols used in the Zoopdog pronunciation guide, and NOT letters occurring in actual Vietnamese words. Additionally, these descriptions are merely an approximation and no substitute for the help of a native speaker.

bdfghlmnsvwz
As in English.
ᴄʜ (Hà Nội)
Unaspirated, as in English mischief, but a little further forward in the mouth, as in Japanese chikuwa.
ᴄʜ (Quảng Nam / Sài Gòn)
Unaspirated, with the tongue curled back, and with less friction. It feels more like throwing your tongue forward than pushing air out between the tongue and the roof of the mouth.
ġ (Hà Nội)
A gargling sound, as in French rôle or Arabic ghareeb.
k
Unaspirated, as in skip or Spanish corazón. Note thatkat the end of a word is unreleased, as in actor.
k’ (Quảng Nam / Sài Gòn)
Aspirated, as in coal.
ᴋʜ (Hà Nội)
As in Scottish loch or German Bach.
k*
Final (unreleasedk with lips closed, like pronouncingkandpsimultaneously, and cheeks puffed.
ng
As in English sing. Note that this sound often occurs at the beginnings of words, not just the ends, as in English.
ng*
Final (unreleasedng with lips closed, like pronouncingngandmsimultaneously, and cheeks puffed.
ny
As in English junior. Note that this sound can come beforew, as in the word nhoài.
p
Only occurs at the ends of words, where it is unreleased, as in captain.
 (Quảng Nam / Sài Gòn)
As in Mandarin rǒu. Roughly similar to the American English red, except with the tongue tensed and curled far back.
sh (Quảng Nam / Sài Gòn)
Further forward in the mouth than in English. Depending on the speaker, this sound can vary between European Spanish salud (with the tip of the tongue flattened slightly) or Mandarin xīn.
t
Unaspirated, with the tip of the tongue against the back of the top teeth, as in Spanish and Japanese toro. Note thattat the end of a word is unreleased, as in thoughtful.
t’
Aspirated, with the tip of the tongue against the back of the top teeth, as in Hindi thālī.
ᴛʏ (Quảng Nam / Sài Gòn)
This sound does not have any equivalent in well-known Western languages. It is like ᴄʜabove, but with the tongue flat, so that the sides of the tongue touch the side teeth. The tip of the tongue does not make contact with the roof of the mouth.

Vowels

Note: For ease of reading, some symbols have been borrowed from the IPA for different sound values. In a few cases, the original Vietnamese vowel letter was used, to eliminate the need to learn too many new symbols. Additionally, these descriptions are merely an approximation and no substitute for the help of a native speaker.

a
Roughly as in American English father, but often slightly further forward in the mouth, as in British English hat or French patte.
å
As in British English bath.
ɐ
As in American and British English under.
æ
As in American English apple.
ê
Same as the Vietnamese letter. As in French santé. (However, note that the Vietnamese letter ê at the end of a word, such as , represents a diphthongized sound as in English day. This is reflected in the guide.)
ĕ
As in American and British English get.
ə
Usually as in American and British English about, but generally used to represent a relaxed-mouth transitioning vowel sound.
ə˞
Similar to ə, but further back in the mouth. No equivalent in well-known Western languages. As in Mandarin hē.
i
As in American and British English feet.
ɪ
As in American and British English big.
o
A pure vowel, as in Spanish hombre.
ɔ
As in American English thought. Note that the combinationɔisounds exactly like English boy.
u
As in American and British English pool.
ư
Same as the Vietnamese letter; no equivalent in any well-known Western languages. Roughly like uwith the lips unrounded, as in Korean eumsik.
ŭ
As in American and British English push.

Length

It may be helpful to refer to this video, which informed and inspired this style of notating phoneme length.

la, nghìn
mua
Short vowels occupy roughly half the time of a long vowel.
mai, mang
These combinations are basically pronounced as you would expect them to be.
may, măng
In these combinations, the vowel is cut short as if you are skipping over the vowel to get to the consonant. Vowel and nasal endings ( 
m
n
ng
) should be held for twice the normal length, as if they are a long vowel. Such “early endings” are shown in dark red to draw your attention.
quốc, lê, tưng
These vowels are pronounced very short and connect the neighboring sounds, as indicated by their transitioning background. In many cases, they are responsible for the “Southern drawl” sound of many Vietnamese words.

Tones, Phonation, and Stops

ma má mã mà
There are five levels of pitch.
học
Dotted lines represent words pronounced with tenseness in the vocal chords. (Wikipedia)
Thick lines represent words pronounced with slackness in the vocal chords, as if you are yawning. (Wikipedia)
chị sữa ai bò
The pause in the word uh-oh is an example of a glottal stop. In Vietnamese, glottal stops can interrupt, end, or even begin words. For example, their co-occurence withbanddat the beginnings of words in the Hanoi accent is what gives them their distinctive sound.