Science Memes

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submitted 1 month ago by [email protected] to c/[email protected]

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[–] [email protected] 11 points 1 month ago (1 children)

Shouldn't it be w>2πF_s?

[–] [email protected] 8 points 1 month ago* (last edited 1 month ago) (1 children)

w_s = 2 * pi * f_s
since you need to sample at 2x or more the highest desired frequency to get proper reproduction, it should be w>(1/2)w_s

w > (1/2) w_s
w > (1/2) 2 pi f_s
w > pi f_s

[–] [email protected] 3 points 1 month ago

you need to sample at 2x or more the highest desired frequency to get proper reproduction

You need to sample at 2x the desired bandwidth, just bandpass filter the signal appropriately before sampling and you won't get aliasing.

[–] [email protected] 7 points 1 month ago* (last edited 1 month ago) (2 children)

Why are we measuring things in balls now?

[–] [email protected] 7 points 1 month ago (1 children)

Its standard practice for math equations involving spectral densities and Fourier transforms to use the testicles character for the independent variable.

Fourier analysis involves measuring the sampled strength of the signal at different points in time. Its also related to ARIMA models. Essentially, you're inspecting how cyclical some data is, and the testies are points in time.

By the way, there is an error in this meme, see the comment left by jjagaimo

[–] [email protected] 1 points 1 month ago

Well, yeah, but how did a drawing of balls become used for that?

!I know it's omega, not balls, but you gotta commit to the bit!<

[–] [email protected] 3 points 1 month ago

Balls means frequency which also happens to have the same units as revolutions so I guess its a real ball twister