Frequency Limits for Octave Bands

Frequency limits for octave bands and 1/3-Octave bands

For practical reasons the audible frequency range is separated into unequal segments called octaves. An octave higher means a doubling of the frequency. Each octave band may be separated into three ranges - referred to as one-third-octave bands - as indicated in the table below:

Frequency (Hz)
Octave Bands 1/3 Octave Bands

Lower Band Limit 

(Hz)

Center Frequency

(Hz)

Upper Band Limit

(Hz)

Lower Band Limit 

(Hz)

Center Frequency

(Hz)

Upper Band Limit

(Hz)

11 16 22 14.1 16 17.8
17.8 20 22.4
22.4 25 28.2
22 31.5 44 28.2 31.5 35.5
35.5 40 44.7
44.7 50 56.2
44 63 88 56.2 63 70.8
70.8 80 89.1
89.1 100 112
88 125 177 112 125 141
141 160 178
178 200 224
177 250 355 224 250 282
282 315 355
355 400 447
355 500 710 447 500 562
562 630 708
708 800 891
710 1000 1420 891 1000 1122
1122 1250 1413
1413 1600 1778
1420 2000 2840 1778 2000 2239
2239 2500 2818
2818 3150 3548
2840 4000 5680 3548 4000 4467
4467 5000 5623
5623 6300 7079
5680 8000 11360 7079 8000 8913
8913 10000 11220
11220 12500 14130
11360 16000 22720 14130 16000 17780
17780 20000 22390

  The "one-third-octaves" have been standardized for scientific instruments commonly used for tasks like determine NC-criterion and similar.

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