Linked Questions

0 votes
1 answer
268 views

how to create synthetic $1/f$ noise? [duplicate]

I am writing an app to work with synthetic time series data from a physics experiment. In our experiments we always have $1/f$ noise in our time series, but I haven't been able to find code/packages ...
sunny's user avatar
  • 1
4 votes
1 answer
3k views

Filter coefficients for colored noise Voss Algorithm

If I use a generic filter for generating colored noise like pink,brown,white then how do I modify this statement and how do I know what are the coefficients to be used in AR model for different noise....
sts's user avatar
  • 59
1 vote
2 answers
3k views

Understanding Voss-McCartney pink noise generation algorithm

I'm implementing the Voss-McCartney pink noise generation algorithm. If you follow the link above, you can read: from James McCartney 2 Sep 1999 21:00:30 -0600: The top end of the ...
Sylvain Leroux's user avatar
1 vote
2 answers
2k views

How to design a variable slope highpass filter

I want to design some specific slope highpass filter to enhance speech; just like $1$ dB/octave, $2$ dB/octave and more. Is there a method to calculate the coefficients by specific slope?
RongJun Huang's user avatar
-1 votes
1 answer
751 views

Sampling Noise Given Power Spectral Density

I am trying to write a Monte Carlo physics simulation which involves, given a power spectral density, sampling rate, and total number of samples, generating noise with such a power spectral density. I ...
Uyttendaele's user avatar
1 vote
1 answer
734 views

Voss algorithm and pink noise

the voss' algorithm generated a 1/f series. What does the series mean? For example, we use three dice and the result sequence length is 8. Let's set the sequence is 8,15,6,9,14,10,9,7. Then what does ...
NHa's user avatar
  • 31
2 votes
2 answers
398 views

How exactly does one apply a Hanning Window for a spectral estimate?

PREAMBLE I am a graduate student researching evolutionary ecology. My supervisor and I have been trying to learn how to simulate colored noise, discretely, by the $\frac{1}{f^\alpha}$ power law for $\...
Winston Campeau's user avatar
3 votes
0 answers
524 views

IIR filters with variable roll-off

I have a filter design problem in which lowpass filters have to be designed with varying roll-off. E.g: 2.7 db/ocatve or 1.4 db/ocave. See picture below. This is easy to achieve with a FIR filter, ...
user avatar
1 vote
1 answer
331 views

Is a "Spectral Tilt Filter" the best way to get an arbitrary slope and cutoff LPF?

I need an arbitrary slope audio LPF for which both the cutoff frequency and slope in dB/oct can be smoothly modulated in real time. Is the "Spectral Tilt Filter" described by Julius Smith the correct ...
mike's user avatar
  • 533
-1 votes
1 answer
327 views

A one-pole LPF (6 dB/oct) has a step response to $1/e$ amplitude of ${\tt time} = 1/(2 \pi f)$. What would the response time be of a 3 dB/oct filter?

I was instructed in another question here that if a one pole (6 dB/oct) low pass filter is fed a discontinuity (ie. going from 1 to 0) it will take ${\tt time} = \frac{1}{2\pi f}$ to reach $1/e$ ...
mike's user avatar
  • 533
0 votes
3 answers
104 views

I often see here formula expressed in term of $z$. But what is $z$?

While searching resources for generating pink noise (and with your help in the comments and answers of other questions), I came to such kind of formula: $$ H(z) = { .041 - .096z^{-1} + .051z^{-2} - ...
Sylvain Leroux's user avatar
1 vote
0 answers
306 views

How to simulate (in matlab or c) power spectrum of random brownian noise signal?

I have a semi random noise signal, it does have some periodicity however. I can estimate the power spectrum (of the blue signal, I thought that it would be more clear, because white noise is flat, ...
Voltage Spike's user avatar
1 vote
1 answer
127 views

Identification of a transfer function

Can you obtain a transfer function in frequency domain with a bode plot form given by this function: $$ S=k_1 \sqrt{1+\frac{k_2}{f}} $$ I did not managed it because actually in the lowest part of ...
Ba5o's user avatar
  • 61
-1 votes
2 answers
153 views

Signal Spectrum Shaping

I am looking for methods/algorithms for signal spectrum shaping. Let's say we have a white Gaussian noise and want to have a desired power-spectral density. The first solution that comes to mind is ...
dsp_guy2020's user avatar
1 vote
0 answers
85 views

noise synthesis arbitrary PSD

I have noise measurements for a circuit, in units of noise power (measured in Watts against a known load), per frequency bin. For simulation purposes, I wish to synthesize noise with the same spectral ...
Yair M's user avatar
  • 305

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