<s>
The	O
mel	B-Architecture
scale	I-Architecture
(	O
after	O
the	O
word	O
melody	O
)	O
is	O
a	O
perceptual	O
scale	O
of	O
pitches	O
judged	O
by	O
listeners	O
to	O
be	O
equal	O
in	O
distance	O
from	O
one	O
another	O
.	O
</s>
<s>
closer	O
approximation	O
of	O
the	O
Mel	B-Architecture
scale	I-Architecture
for	O
frequencies	O
below	O
1000Hz	O
,	O
at	O
the	O
price	O
of	O
higher	O
inaccuracy	O
for	O
frequencies	O
higher	O
than	O
1000Hz.	O
"	O
</s>
<s>
Other	O
functional	O
forms	O
for	O
the	O
mel	B-Architecture
scale	I-Architecture
have	O
been	O
explored	O
by	O
Umesh	O
et	O
al	O
.	O
</s>
<s>
Stevens	O
 '	O
student	O
,	O
Donald	O
D	O
.	O
Greenwood	O
,	O
who	O
had	O
worked	O
on	O
the	O
mel	B-Architecture
scale	I-Architecture
experiments	O
in	O
1956	O
,	O
considers	O
the	O
scale	O
biased	O
by	O
experimental	O
flaws	O
.	O
</s>
