US English (en-us)

ARPABET	UNICODE	IPA	EXAMPLE
aa	\u0251	ɑ
ae	\u00e6	æ
ah0	\u0259	ə	about
ah1	\u028c	ʌ	mud
ao	\u0254	ɔ
aw	\u0061\u028a	aʊ
ay	a\u026a	aɪ
b	b	b
ch	t\u0283	tʃ
d	d	d
dh	\u00f0	ð
eh	\u025b	ɛ
er	\u025a	ɚ
ey	e\u026a	eɪ
f	f	f
g	g	g
hh	h	h
ih	\u026a	ɪ
iy	i	i
jh	d\u0292	dʒ
k	k	k
l	l	l
m	m	m
n	n	n
ng	\u014b	ŋ
ow	o\u028a	oʊ
oy	\u0254\u026a	ɔɪ
p	p	p
r	r	r
s	s	s
sh	\u0283	ʃ
t	t	t
th	\u03b8	θ
uh	\u028a	ʊ
uw	u	u
v	v	v
w	w	w
y	j	j
z	z	z
zh	\u0292	ʒ

In cases of silence or noise, the API may also return the following phoneme codes:

CODE	DESCRIPTION
sil	Silence
spn	Spoken noise