English (US) (en-US)

The following table lists the International Phonetic Alphabet (IPA) phonemes, the Extended Speech Assessment Methods Phonetic Alphabet (X-SAMPA) symbols, and the corresponding visemes for the American English voices that are supported by Amazon Polly.

Phoneme/Viseme Table
IPA	X-SAMPA	Description	Example	Viseme
Consonants
b	b	voiced bilabial plosive	bed	p
d	d	voiced alveolar plosive	dig	t
d͡ʒ	dZ	voiced postalveolar affricate	jump	S
ð	D	voiced dental fricative	then	T
f	f	voiceless labiodental fricative	five	f
ɡ	g	voiced velar plosive	game	k
h	h	voiceless glottal fricative	house	k
j	j	palatal approximant	yes	i
k	k	voiceless velar plosive	cat	k
l	l	alveolar lateral approximant	lay	l
m	m	bilabial nasal	mouse	p
n	n	alveolar nasal	nap	t
ŋ	N	velar nasal	thing	k
p	p	voiceless bilabial plosive	speak	p
ɹ	r\	alveolar approximant	red	r
s	s	voiceless alveolar fricative	seem	s
ʃ	S	voiceless postalveolar fricative	ship	S
t	t	voiceless alveolar plosive	trap	t
t͡ʃ	tS	voiceless postalveolar affricate	chart	S
θ	T	voiceless dental fricative	thin	T
v	v	voiced labiodental fricative	vest	f
w	w	labial-velar approximant	west	u
z	z	voiced alveolar fricative	zero	s
ʒ	Z	voiced postalveolar fricative	vision	S
Vowels
ə	@	mid-central vowel	arena	@
ɚ	@`	mid-central r-colored vowel	reader	@
æ	{	near open-front unrounded vowel	trap	a
aɪ	aI	diphthong	price	a
aʊ	aU	diphthong	mouth	a
ɑ	A	long open-back unrounded vowel	father	a
eɪ	eI	diphthong	face	e
ɝ	3`	open mid-central unrounded r-colored vowel	nurse	E
ɛ	E	open mid-front unrounded vowel	dress	E
i	i	long close front unrounded vowel	fleece	i
ɪ	I	near-close near-front unrounded vowel	kit	i
oʊ	oU	diphthong	goat	o
ɔ	O	long open mid-back rounded vowel	thought	O
ɔɪ	OI	diphthong	choice	O
u	u	long close-back rounded vowel	goose	u
ʊ	U	near-close near-back rounded vowel	foot	u
ʌ	V	open-mid-back unrounded vowel	strut	E
Additional Symbols
ˈ	"	primary stress	Alabama
ˌ	%	secondary stress	Alabama
.	.	syllable boundary	A.la.ba.ma