Linked Questions
16 questions linked to/from How can I plot the frequency response on a bode diagram with Fast Fourier Transform?
10
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Compensating Loudspeaker frequency response in an audio signal
I have been working on a project in which I was required to work on the audio signals recorded from the loudspeaker kept in front of a filter. So, to simply explain it:
$$\boxed{\rm LoudSpeaker} \...
- 101
5
votes
1
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Simulation of a Frequency ramp
This might be an easy one!
Please preface your answer with spoiler notation by typing the following two characters first ">!"
Given the following equation that describes a cosine wave as a function ...
- 55k
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2
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The FFT of a sine wave with varying frequency and constant amplitude does not show a plateau, why?
I want to use python to see what the audio response of a speaker is. This would be done by comparing the output of the speaker measured with a microphone to the given input. That means that for both ...
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7
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1
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Get the room impulse response by using inverse filter of sin sweep signal
I want to simulate the process of obtaining the impulse response of a room.
What I did:
Generate a room impulse response sequence by using the python module: ...
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0
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1
answer
950
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Magnitude Spectrum of a Linear Chirp Signal
I am trying to understand intuitively the fft of a signal that changes in frequency in time.
Suppose I have the fft of a linear chirp signal sampled at 1 kHz for 2 seconds. The instantaneous frequency ...
- 111
2
votes
1
answer
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Why does this transfer function estimation not work? System identification
Goal:
I have an unknow dynmical system $G(s)$ and I want to find it from measurement data, output $y(t)$ and input $u(t)$. The data is frequency responses.
Method:
I begun first with creating the ...
- 417
0
votes
0
answers
426
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What's the complex chirp signal?
I have a question. Why a chirp signal has the Fresnel ripples in slobes? I thought it has the equal amount of frequencies from lowerband to high band, so we should see the flat magnitude. Is that ...
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0
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1
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Why is an imaginary part in the output of my time-domain resposne of real input?
I have measurements of a transfer function $H(f)$ in the frequency domain between 1-6 GHz. I also have an input signal, which is pulsed chirp $x(t)$. The goal is to build the time-domain response of ...
- 91
1
vote
1
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229
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DDS generated chirp and antialiasing filter : what is the best suited filter for a chirp?
I am defining the required antialiasing (analog) filter for a chirp generated by a DDS. The chirp is produced in a FPGA (NCO generation) and forwarded to the DAC for the samples generation (with ...
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1
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0
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290
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Sweep synthesis in frequency domain: How to correctly adjust magnitude?
I'm attempting to synthesize a logarithmic sweep signal to measure the IR of a system. For the most part, I'm following Section 5.2 of the paper Transfer Function Measurement with Sweeps.
To generate ...
- 11
1
vote
1
answer
124
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Match an Equalizer Curve
I’ve passed a sine sweep wave file into an equalizer plugin I have, now I want to model it in matlab so that I can ‘copy’ the equalizer setting sound. I’ve both in.wav and out.wav audio files and ...
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0
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1
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Chirp pulse train FFT
I'm trying to understand why the Fourier transform of a chirp pulse train looks the way it does.
I will attach the result I get in MATLAB at the end of the question. I tried to develop analytically ...
0
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0
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141
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Advice on generating stable FMCW waveform
I am trying to derive parameters for a triangular FMCW waveform such that the phase of the signal has consistency from one period to the next. Perhaps this is arbitrary and feel free to tell me so, ...
1
vote
1
answer
79
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Inferring a response from the Analytic Signal
I have a slowly varying sinusoidal system. The output is separated using methods that produce a real signal $x(t)$ and quadrature component $y(t)$ such that $x(t)$ represents the real physical value ...
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0
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0
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Frequency Modulation - Demodulation - Distorted frequency shape
I am interested in the effect frequency modulation has on the signal.
I am using an acousto-optic deflector to steer a laser beam. The deflector receives a Radio-frequency (RF) signal (~100 MHz, sine-...
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