The Centibel
a better way to quantify performance changes
+1
cB
≈
1.02×
speed
.98×
time
=
+2%
speed
−2%
time
+4
cB
≈
1.10×
speed
.91×
time
=
+10%
speed
−9%
time
+10
cB
≈
1.25×
speed
.80×
time
=
+25%
speed
−20%
time
+18
cB
≈
1.50×
speed
.67×
time
=
+50%
speed
−33%
time
+30
cB
≈
2.00×
speed
.50×
time
=
+100%
speed
−50%
time
+60
cB
≈
4.00×
speed
.25×
time
=
+300%
speed
−75%
time
+90
cB
≈
8.00×
speed
.13×
time
=
+700%
speed
−87%
time
+100
cB
=
10.00×
speed
.10×
time
=
+900%
speed
−90%
time
+200
cB
=
100.00×
speed
.01×
time
=
+9900%
speed
−99%
time
Percent ✗
+50% speed = −33% time
+50% then +50% =
+125%
+50% then −50% =
−25%
Centibel ✓
+50 cB speed = −50 cB time
+50 cB then +50 cB =
+100 cB
+50 cB then −50 cB =
0 cB