<s>
Non-speech	B-General_Concept
audio	I-General_Concept
input	I-General_Concept
is	O
the	O
use	O
of	O
non-speech	O
sounds	O
such	O
as	O
whistling	O
,	O
humming	O
or	O
hissing	O
for	O
entering	O
data	O
or	O
controlling	O
the	O
user	B-Application
interface	I-Application
.	O
</s>
