Howtosignalprocessing
- Why use 1 3 octave band?
- What is an octave filter?
- How do you calculate one-third octave band?
- What is a third of an octave?
Why use 1 3 octave band?
Mainly used in environmental and noise control applications, 1/3 Octave Bands provide a further in-depth outlook on noise levels across the frequency composition. Each 1/1 (single) Octave is further split into three, providing a more detailed view of noise content.
What is an octave filter?
Octave-Band Filter
An octave is the interval between two frequencies having a ratio of 2:1 (or 10 3 / 10 ≈ 1 . 995 for base-10 octave ratios). An octave-band or fractional-octave-band filter is a bandpass filter determined by its center frequency, order, and bandwidth.
How do you calculate one-third octave band?
A band is said to be an octave in width when the upper band frequency is twice the lower band frequency. A one-third octave band is defined as a frequency band whose upper band-edge frequency (f2) is the lower band frequency (f1) times the cube root of two.
What is a third of an octave?
A one-third octave is a logarithmic unit of frequency ratio equal to either one third of an octave (1200/3 = 400 cents: major third) or one tenth of a decade (3986.31/10 = 398.631 cents: M3 Play (help·info)).
