What is Bandwidth? (Bandwidth and Signal Processing)

Throughout this lecture, we use an Analog Arts (analogarts.com/) SF880 for signal analysis.
In analog signal processing, bandwidth is the difference between two frequencies at the lower and upper boundaries of a continuous set. It is typically quantified in hertz. Ideally, a signal with a frequency that lies in the specified range passes through a medium without a significant amount of amplitude reduction. On the other hand, frequencies outside the bandwidth range, experience an amplitude loss. Generally, the amplitude reduction is specified in dB. Most often, bandwidth specifies the frequency at which the processing loss is 3 dB or about 30 percent of the input signal.
Base-band and pass-band terminologies describe the lower frequency boundary for a given bandwidth.
In a Base-band system the lower boundary is 0 Hertz or DC. And the higher boundary is referred to as the bandwidth of the system.
For a pass-band system, bandwidth defines a frequency range around a mid-point called the center frequency. The two cutoff frequencies are the center frequency plus and minus one half of the bandwidth
In a baseband system, bandwidth defines the 3 dB cut off frequency, whereas in a pass-band application, both the bandwidth and the center frequency are required to determine the frequency response of the system.
A signal is a composition of one or more sine waves. Sine waves of different frequencies, amplitude, and phase are the building blocks of any signal. The difference between the highest and the lowest frequency components define the required bandwidth to process the signal. For example an ideal square wave, regardless of its period is composed of infinite number of frequencies and therefore it ideally needs an infinite processing bandwidth.
To properly process a signal, the required bandwidth should be considerably larger than the highest frequency component of the signal.
The bandwidth of a system depends on several factors and is generally limited by the component with the smallest bandwidth.
Although the detectable frequency range of human ear is 20 Hz to 20 kHz, limiting an audio system to this bandwidth distorts the sound. That is a reason why we can easily distinguish a recorded audio versus a live audio. A higher bandwidth often offers more flexibility. However, at times the bandwidth of a system is intentionally lowered to zoom on a specific band of frequencies or to reduce noise.
Join us.

[@lhxperimental]

This was the first robotic voice video that was actually quite useful. Thanks for the video.

[@franciscohanna2956]

was about to say the same

[@CossZt6]

mood

[@chansong2906]

lol

[@garrettfatima8121]

should collaborate with AhmadBazzi !

[@agstechnicalsupport]

A good explanation of the concept of bandwidth. Thank you !

[@academia7768]

Thanks for watching.

[@TuberKMT]

That was awesome! Helped a lot! Thank you!

[@brucec4121]

Easy and clear, very good

[@Andi_97_]

Great video!

[@millieh3179]

Could you use this to explain bandwidth, for example the frequency range which the high pass filter has sufficient gain on the input?

[@alpachino468]

I love it when Robocop teaches me something new...

[@sobanmalik3731]

Most helpful video

[@thewelcometodark]

U cleared my doubt that's sir

[@StandforAjdetray]

Much appreciated sir 😊

[@sherzadakhan3191]

could you plz explain how would we measure/determine the bandwidth of any given medium? plz mention some techniques/methods. i have a coaxial cable i would like to determine its bandwidth how to determine it?

[@EfieldHfield_377]

The BW of coaxial cable will be very high, in GHz. Are you sure you want to measure its BW or its characteristic impedance. Two different things. If you want to measure BW of the cable, something i have never personally done, then i would try using a spectrum analyzer with a tracking generator function. Use a spectrum analyzer with the highest possible BW and be sure to normalize the response before you start. Sorry i could not be of more help, but if i had to start somewhere this is where i would begin.

[@raghdanalathwary8359]

Very excellent

[@tatvamkrishnam6691]

Why are frequencies not in the bandwidth not transmitted via the channel? Is it because every channel has its own capacitive/inductive qualities? From my limited knowledge, I know except for the resistor, the impedance changes with the frequency.

[@samanehchoupani380]

that was great thank you

[@gomathib2310]

Amplifiers & Digital Signal Processing dedicated to the Slope Area(Hills) on the way to "Lord Shiva" Temple where the Audio is with Signal Disturbance.

[@mavic6155]

Why are the bandwidth markers at -3dB mentioned being -29%? Reason for asking: +3dB is 200% and -3dB is 50%, but here this seems not the case?

[@academia7768]

There is a power ratio and then there is an amplitude ratio. The amplitude ratio is the square root of power ratio. You are absolutely correct with your numbers when we talk about power. However, here we are talking about the amplitude of the signal. -3dB translate to 0.5 (or 50%) in power and the square of 0.5 (0.71, or 71% so 29% down) for amplitude.

[@mavic6155]

@@academia7768 Thank you so much.

[@ohadgadperi3629]

its for education you dont need to do that

[@steven-tb9eq]

I find computerized voices desensitizing - the passion of the original speaker is lost. P.S. sorry to be so late . . . 😀

[@ayeshababar8383]

😂I don't like the robotic voice