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Amazon Polly
Developer Guide

English, American (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

g

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

t

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

aI

diphthong

price

a

aU

diphthong

mouth

a

ɑ

A

long open-back unrounded vowel

father

a

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

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