Hi,
1. How are harmonics created in a signal?
2. What are it's uses?
3. Are harmonics desirable?
4. In computations, are harmonics being taken into consideration?
I am asking all these because the readings I've done don't give me straight forward and clear answers. I am hoping that someone can help me understand these well.
Regards,
meowth8
Distortion.1. How are harmonics created in a signal?
Sometimes it is desirable to create a high frquency signal from one of lower frequency.2. What are it's uses?
In the example above, yes they are. Otherwise the multipliers would not work.3. Are harmonics desirable?
Sorry but I do not understand your question.4. In computations, are harmonics being taken into consideration?
4. In computations, are harmonics being taken into consideration?
Hi,
1. How are harmonics created in a signal?
2. What are it's uses?
3. Are harmonics desirable?
4. In computations, are harmonics being taken into consideration?
I am asking all these because the readings I've done don't give me straight forward and clear answers. I am hoping that someone can help me understand these well.
Regards,
meowth8
Harmonics are harmonics. Makes no difference whether it is audio or electrical. A harmonic is just a multiple frequency of the fundamental frequency. Of course audio harmonics can be electrical before they are reproduced by a transducer (speaker) to become sound waves with harmonics........................
Correct me of I'm wrong sir, harmonics in audio is different from electronic harmonics.
sir eric's answers for questions 1 and 4 are about electronic harmonics and for 2 and 3, audio harmonics.
Are audio and electrical harmonics separate branches of harmonics or they always go hand in hand?
........................
"Remember a square is composed of the fundamental and all the odd harmonics at a decreasing level of the harmonic frequency."
I didn't understand this sir. Although this was restated and explained in MrAl's reply, I wasn't able to understand it right. All I have is a picture of the square wave on my head and but the idea of having odd harmonics in a decreasing frequency is not yet clear.
Integrating sin(n*x) from -pi to 0 first we get:
cos(pi*n)/n-1/n
A small additional note here is that in order to get a square wave that goes plus and minus 1, we end up with a factor of 4/pi which is slightly greater than 1. This means if you want to try to reproduce the square wave you'd have to include an amplification factor of 4/pi.
Harold777:
This is not homework. I even forgot where my questions originated.
This is learning for me. No deadlines. No pressure. No limits.
Pure enjoyment of what I do.
MrAl:
The steps you have showed are very comprehensive and easy to follow.
I think I will be able to extract the other waveforms into their sine and cosine components.
I got cos(-pi*n)/n-1/n
At first I thought there was a mistake not realizing immediately that –pi and pi are coterminal.
I don’t get this part so clear sir. I have several questions on this part.
What is the significance of the amplification factor 4/pi?
What does the word “reproduce” mean?
Isn’t it that this equation:
Y=(4/pi)*sin(w*t)+(4/3pi)*sin(3*w*t)+(4/5pi)*sin(5*w*t)+(4/7pi)*sin(7*w*t)+(4/9pi)*sin(9*w*t) . . .
gives us a square wave that goes on and on since the component sine waves are waveforms that do not end, hence, the square wave is reproducing and unending?
meowth08
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