Questions tagged [frequency-response]

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12
votes
3answers
11k views

What is the difference between frequency response and transfer function?

I would like to understand the difference between frequency response and transfer function. I know the former can be obtained by substituting \$s = j\omega\$. But what is the difference in ...
8
votes
5answers
7k views

Formula for Logarithmic (audio taper) pot

What I would like I am trying to determine the formula for an audio taper (logarithmic) pot. I would like a formula that takes R and P as inputs. R being the total resistance and P being the "...
10
votes
1answer
1k views

What does a bode plot represent and what is a pole and zero of bode plot?

I studied bode plot and the author of book is somehow relating zeros of transfer function to bode plot. What is the relation between zeros or poles of bode plot and transfer function? We usually take ...
11
votes
3answers
5k views

Why aren't active headphones equalized to a flat frequency response?

Some headphones are 'active', with amplifiers built into the cups and requiring a power source (typically AAA batteries). I then see many audiophiles discussing frequency response as a metric of how ...
4
votes
5answers
3k views

Laplace transform and the idea of frequency domain analysis

I have studied control theory in depth in my undergrad and still continue to use it on many occasions in my PhD work, but i still don't fully understand why we call Laplace transformation of system a "...
6
votes
3answers
1k views

Does a voice coil vibrate at the same frequency as the source sound file?

As a disclaimer I know very little about this so I'm probably describing this in a very imprecise way. Say you generated a sine wave on your computer at 800Hz and played it through a speaker. Would ...
1
vote
4answers
4k views

LC low pass filter: intuitive understanding

The figure below is an LC low pass filter and its bode plot. As we can see the ratio Vout/Vin is larger than 1 around the resonant frequency. Is there an intuitive explanation why the ratio is ...
1
vote
3answers
408 views

Interpreting the open loop gain of a linear power supply

This question is related to a question asked earlier regarding a linear power supply build. It turns out that the circuit is oscillating quite badly; an issue not uncommon in feedback circuits. I've ...
0
votes
2answers
493 views

Poles and Zeros of Two Pole Compensation

I am known with the basics of what poles and zeros of transfer function are and how to determine them, but I certainly don't know how to apply such poles and zeros to the gain curve, which describes ...
0
votes
2answers
1k views

sampling rate and frequency response of a vibration sensor

I am trying to measure the vibrations of a lathe machine using a piezoelectric accelerometer sensor. I want to know if the sampling rate can be set at a value greater than the flat response frequency ...