Amplitude is normally associated with the time-domain representation of a waveform. When you plot a waveform/signal against time you are plotting the instantaneous amplitude as it varies over time. The instantaneous amplitude can have both positive and negative values. Magnitude is a measure of how large a something is and it is always a positive value. For example the number 1 and the number -1 both have a magnitude of 1. Also, the numbers 2+3j and 2-3j have a magnitude of 3.6056.
hei david, in ur earlier videos, the freq pots were coming as single lean spikes, but the plot shown at 8.07 shows a triangular spike - could you please explain why it appears triangular and not straight vertical (lean)spikes.. thanks for your videos- great help.
The triangles appear because of the way the plot function connects the data points plotted. Data points are connected using straight lines so a sequence of 3 data values such as [ 0 3 0 ] will appear as a triangle. If you were to replace the plot function with a stem function you would get the vertical spikes. You should compare plot( [ 0 3 0]) with stem( [ 0 3 0 ])
sir please provide a matlab code which show how to calculate spl when upper and lower limit of frequency is given.In short calculation of spl for certain range of frequencies..
thank you very much for these videos!!
Amplitude is normally associated with the time-domain representation of a waveform. When you plot a waveform/signal against time you are plotting the instantaneous amplitude as it varies over time. The instantaneous amplitude can have both positive and negative values.
Magnitude is a measure of how large a something is and it is always a positive value. For example the number 1 and the number -1 both have a magnitude of 1. Also, the numbers 2+3j and 2-3j have a magnitude of 3.6056.
i have watched all your videos, and i think they are great! thank you.
That's pretty simple. Thanks a bunch!
Very useful, thank you!
thanks!!!!!!!! (from Berlin)
hei david, in ur earlier videos, the freq pots were coming as single lean spikes, but the plot shown at 8.07 shows a triangular spike - could you please explain why it appears triangular and not straight vertical (lean)spikes.. thanks for your videos- great help.
The triangles appear because of the way the plot function connects the data points plotted. Data points are connected using straight lines so a sequence of 3 data values such as [ 0 3 0 ] will appear as a triangle.
If you were to replace the plot function with a stem function you would get the vertical spikes. You should compare plot( [ 0 3 0]) with stem( [ 0 3 0 ])
thanks a lot for that explanation.
i was unsuccessful at putting in my own voice recording for analysis into fourierdemonstration.m. How should i go about that?
Hey David!
What's the difference between magnitude and amplitude?
sir please provide a matlab code which show how to calculate spl when upper and lower limit of frequency is given.In short calculation of spl for certain range of frequencies..
thank you very much for these videos!!