Frequency
Octave Divisions
multiplier
1/12
1/6
1/3
1/2
1
1.0
x
x
x
x
x
1.06
x
1.12
x
x
1.18
x
1.25
x
x
x
1.32
x
1.4
x
x
x
1.5
x
1.6
x
x
x
1.7
x
1.8
x
x
1.9
x
2.0
x
x
x
x
x
2.12
x
2.24
x
x
2.36
x
2.5
x
x
x
2.65
x
2.8
x
x
x
3.0
x
3.15
x
x
x
3.35
x
3.55
x
x
3.75
x
4.0
x
x
x
x
x
4.25
x
4.5
x
x
4.75
x
5.0
x
x
x
5.3
x
5.6
x
x
x
6.0
x
6.3
x
x
x
6.7
x
7.1
x
x
7.5
x
8.0
x
x
x
x
x
8.5
x
9.0
x
x
9.5
x
Table 8.7: ISO standard frequency centres for fractional octave
spacing.
34