Physics - Waves - Analogue and Digital Signals

A High school science GCSE Physics revision video all about analogue and digital signals. For edexel, AQA and OCR exam boards and iGCSE. Covering interference and noise and advatages and disadvantages.

[nthegrsgreatadventures]

Who is only here because of social distancing science class

[volume]

please help me! how is a digital signal created from an analogue sound signal?

[christinadc]

So good explanation sir!! Too informative and helpful!! Thanks

[mtg.]

Science class has brought us all here.

[Toshigun]

Lol, watching this in school for a science project.

[slowentropy]

How come they always fail when I'm using it for live feed purposes? Analogue never fails in that regard?

[xmidavx]

A square wave radio signal? The signal that is emitted by the antenna is digitally modulated, but it does not look like a square wave.

[Mulkek]

Thank you, and it is so simple & clear!

[Radlee.]

If it wasn't for science homework from distant learning, I may never have seen this)
Great video

[geneb.b]

well, both have advantages depending on what particular application, but also have disadvantages... analog signal is practical for long distance propagation of radio waves but incurs loses when not amplified, whereas digital signal is said to be noise free but mostly use for short distances because it has bandwidth issues and also needs repeaters to maintain its signal strength...and digital signal can not be transmitted in space unless converted into analog signal (for radio waves).but with the radio horizon, propagation of digital signal is made in air. correct me if i'm wrong...tnx

[JD-kfki]

Even though his animation looks kinda "analog" but somehow it's clear. I get what he says.

[no-delg]

How digital signals sent through space ? And why 1s and 0s why not other values 1 and 0s not enough to encode all infinite numbers and signals

[SethMtv]

You went on a two year hiatus and you're now back with science!

[pkdb]

For audio, I would try to stay analog all the way until going into the AD converters. Just use high quality balanced leads.

Analog is a smooth, round, consistent waveform, while digital is "square-y" and inconsistent. No matter how high the sample rate, it's never going to be as smooth and full sounding as the real thing.

If you compare a digital vs analog connection where the distance is like, miles... then digital wins easily. Because the sound quality is going to be fairly good considering how far the signal travels. Analog will pick up way too much noise.

BUT (!!!) if the distance is - let's say - only from one room to another, then stay analog. You would lose more info going digital than the noise you'd gain with analog, within such short distance.

So it really comes down to distance.

Short - stay analog, because the quality beats digital. It's what you'd call "lossless"
Long - definitely digital, because even though you lose info during the conversion, the signal doesn't change depending on distance once it's traveling.

[landendow]

haha he said maths what a n e r d

[FLATSTONE]

anyone who plays electric guitar will know the struggle.

[butternaan.]

Whos here from Mr.Lundburgs class </3

[AnilKumar-zoeu]

Thank you sir for your packaged information

[hollywood]

this is slightly misleading. Digital is not a wave for transmission and thereby a "signal" as you are making it sound. Digital is a way of encoding a wave or signal...and is transmitted either through an analog wave or intermittent analogue wave