<s>
Piezoelectric	O
Micromachined	O
Ultrasonic	B-Algorithm
Transducers	I-Algorithm
(	O
PMUT	B-Algorithm
)	O
are	O
MEMS-based	O
piezoelectric	O
ultrasonic	B-Algorithm
transducers	I-Algorithm
.	O
</s>
<s>
Unlike	O
bulk	O
piezoelectric	O
transducers	O
which	O
use	O
the	O
thickness-mode	O
motion	O
of	O
a	O
plate	O
of	O
piezoelectric	O
ceramic	O
such	O
as	O
PZT	O
or	O
single-crystal	O
PMN-PT	O
,	O
PMUT	B-Algorithm
are	O
based	O
on	O
the	O
flexural	O
motion	O
of	O
a	O
thin	O
membrane	O
coupled	O
with	O
a	O
thin	O
piezoelectric	O
film	O
,	O
such	O
as	O
PVDF	O
.	O
</s>
<s>
In	O
comparison	O
with	O
bulk	O
piezoelectric	O
ultrasound	B-Algorithm
transducers	I-Algorithm
,	O
PMUT	B-Algorithm
can	O
offer	O
advantages	O
such	O
as	O
increased	O
bandwidth	B-Algorithm
,	O
flexible	O
geometries	O
,	O
natural	O
acoustic	O
impedance	O
match	O
with	O
water	O
,	O
reduced	O
voltage	O
requirements	O
,	O
mixing	O
of	O
different	O
resonant	O
frequencies	O
and	O
potential	O
for	O
integration	O
with	O
supporting	O
electronic	O
circuits	O
especially	O
for	O
miniaturized	O
high	O
frequency	O
applications	O
.	O
</s>
