Only just found this video and it was a Eureka moment as I have heard these tones and transmissions for years. Thank you for explaining this to us.

This is a video I've wanted for so long but never thought I'd get! I have wondered about the sound at 2:51 for years! I never knew the purpose and could never explain it to people when I asked for answers. Great video and very insightful!

You've done it again. Fasinsting and clearly explained as always

That Pro32A was my first ever scanner from the days of Tandy

3:55 It’s worth remembering that your car can be stolen this way. For example, a car thief standing outside your home and cloning your keyless entry keyfob through the walls, then repeating the signal to open your car door and even getting the start/stop button to work. When inside your home, keeping your keyfob inside a faraday cage or faraday bag will stop a thief.

This is probably one of the best video's you've done so far. There were a few weird bleeps I've heard in this clip that were a mystery before watching this video, and I've played around with radio kit of some form for most of my life as a kid and an adult. I believe this could be a continuing series of videos with more weird and unknown bleeps heard through the radio spectrum. Brilliantly researched and presented.

These sounds are always so haunting to me, im not a radio listener or hobbyist but i enjoy your channel! I remember back when my brother and I would use the radio many years ago, i had a phobia of radio static and these noises still creep me out for some reason. I know its all innocuous and normal things now, its just strange to hear all these sounds. Its like an invisible (inaudible) world of machines all shouting at each other and listening to them through a radio receiver is like hearing the sound of a thousand voices screaming all at once....

Still playing catch up but loving all of it, thanks again 48-70🇬🇧👍

The excitement of radio scanning dwindled once mobile phones and emergency services went digital. I still have my old PRO-2004 scanner which used to burst into life around 4pm each weekday with mobile phones.

Really good Lewis! Not many videos have gone into this sort of detail. A part 2 is definitely needed!

Very well covered & easy to understand explanations of the common signals found on the wideband ranges.

As Mike ( comments ) said you must have put a fair bit of effort into that video, research, finding photos, etc. Then making the video itself, you deserve more views ! Well done

Great stuff. I love the look of that Realistic Pro-32.

Heard many of these sounds over the years. Brilliant and informative video. I used to decode pocsag a lot.

Brilliant video. Love to hear another set of strange noises.

Really interesting and well researched. This channel just gets better and better!

Excellent video Lewis. My first scanner was the Realistic Pro 32, and most of those signals I come across - thank for for letting us know what they all are.

Thanks Lewis

2 years later and this video is still helpful with understanding the meaning of different sounds when scanning. Thanks!

Lewis one of of the best informative videos you have done thank you and keep them coming Alex M7MEX

Good informative video Lewis,please keep the videos coming .More of these strange signals would be welcome.

Brilliant video, have been mucking about with scanners since I was a kid and always wondered what the digital noises were.

Great video Lewis thanks for making and posting 👍

I remember those Beeeeee- Bleep, Bleep bleep Bleep tones followed with a voice sayIng the recipients name saying please call (this # phone number). These tones dominated the 1970’s to 80’s VHF band but disappeared in the 90’s.

This is so cool! Part two please, this was really useful. You probably know about it but there is a website called "signal identification wiki" which can give you another leg up to finding out what noises you're hearing.

Thank you so much for taking the time to make and post this neat and informative video..... LM

Excellent! Thank you. Back in the early 1970’s I used to hear a deep signal accompanied by s sound that resembled a fog horn on the AM band, late at night. I lived in the US at the time. California Bay Area, near the Pacific Ocean. Never figured out what it was.

I'd love to see more of these videos chap!!

Very very interesting. Thank you!

Excellent, added to my general knowledge of radio signals across the bands.

Excellent video ! Keep making videos !!!

Excellent Presentation

Another great informative video Lewis.. often wondered what some of the noises are...👍

Thanks for the information,…. Watching from Kentucky “The Bluegrass State “ USA 🇺🇸

Great video. Thanks

I know there are american radio enthusiast youtubers but man you just go into a certain detail with the RK radio systems that I am really intrigued by. Too bad I dont live there so I cant experience the exact same things.

Be aware, there is a rental company out of California that has gotten a massive number of FCC licenses to use with burst transmitters on telephone poles. They have been given licenses in virtually all bands, and many of the frequencies are already licensed to commercial radio companies. They tend to use them in areas of lower population to transmit any information about electrical use to the various electric providers. Despite them being licensed for lower power, they are interfering with various radio communications providers. This is from personal experience.

Flippin' sweet video man

Thanks Lewis, really interesting video :)

This was a very interesting Lewis, thanks for taking the time to research and make this video. I would definitely like to see a part 2. Ideas for signals include APRS on 144.8, SSTV from the International Space Station on 145.8, FT8 on 50.313, and weather stations on 433.92. 73.

Should have had a scanner in the 80's and 90's. There was always something interesting to listen to, I spent many hours listening to my Yupiteru MVT-8000 in those days.

Excellent, I did enjoy this video, with many more to look at. thank you again ❤❤😃😃🧐😎

Still have my Yupiteru MVT-7100.. Regularly power it up for a listen when I'm bored. Brilliant piece of kit.

Another interesting video buddy, nicely done.

Lewis it’s not just the police that use Airwave. It is also used by ambulance, fire and lowland search and rescue. It is also extensively used by HM Coastguard, the real 4th emergency service to communicate with the other emergency services as well as with the coastguard search and rescue helicopters. The coastguard also use MF, HF and VHF radios with HF being used as the secondary comms for the helicopters. Also the pagers have all gone from the coastguard with the exception of their VHF channel 0 pagers used in area of poor mobile coverage.

Nice one Lewis 👍

Fascinating info just found you and subscribed i have 2 baofeng gt 3tp radios i got for Christmas and you seem to have the most knowledge and info about radio usage 😀

Thank you very interesting informative well done

Great Video. Here in Aust we used to have a huge SMR ( State Mobile Radio) network run by our national communications & telecommunications services provider Telstra on VHF High 156 to 170 Mhz used not only by private companies, public transport, utilities like power & watee but all emergency services & with some proprietary Moto gear it provided hours of enjoyable listening & information exchange between like minded radio & scanner enthusiasts that was until the public transport left 1st & went to an encrypted network called GSMR or global systems mobile rail communications, following hot on the heals was the emergency services that went to both a VHF & UHF encrypted Apco 25 network on 420Mhz UHF encrypted N/W & 165 Mhz VHF both encrypted & a "currently" open Tait I & II network. The utilities went to mobile phone & 4G data, I think that there might still be 1 or 2 "private" users on the network but everyone else is gone. Here in Aust there is very little to really listen to as 99% of comms are encrypted with some states & teritories fully encrypted. There's a little bit of Pocsag but not much with the emergency services using a 2 x way encrypted proprietary paging network now. Only approx. 50% of aircraft in Aust use voice now with the other 50% usung about data like Acars, Cpdlc, inmarsat & onenet for all operational communications including landing & take off clearances as well as in flight comms, aviation HF comms is just about dead with only a tiny fraction of what used to be. Shipping is mainly Inmarsat or AIS with a tiny bit of simplex in port VHF comms on 156Mhz just talking to the port authority but you have to be within a handful of km's from the port to really hear anything other than that its jusr leasiure craft & a hand full of fishing trawlers, Marine HF is just about dead. Taxi networks are long gone here in Aust, taxis are now fully deregulated 1/2 of all taxis here in Aust are now ride share, the few taxis that still have radios most are just data terminals with the rest using either Snapchat, Zelo or other PTT service to communicate. The "Taxi Base" is pretty well long since gone you can still ring & get a cab but stats show that only about 2% of cab orders are via a voice call to a national No. Here in Aust with the rest usung other means to order a cab. The company taxis left are connected to an app network & you use an app on your smart phone to order a cab or if you are a regular taxi / cab user with a regular driver you simply call them on their mobile they them selves operate in small fleets or groups from everything from a handul of drivers & cars up to many dozens of drivers & cars so if your regular driver cant do your trip he/ she has one of their fleet / group drivers do the trip, these group / fleet drivers are hand picked for their years of experiance, professionalism, presentation & area knowledge and mostly use mobiles, PTT, or Snapchat to communicate. In general whats left that is still in the clear is pretty boring ( apart from our fire services during the Aust'n summer bush fire season when comms can really liven up.) To the best of my knowledge 99.9% of comms in Aust is digital & all involve some form of trunking network. The ACT ( Australian Capital Territory & the Northern Territory in Aust are 100% encrypted & Tasmania is about to join them in the next 12 monts with our national carrier winning a major comms contract to encrypt the whole island state ( all in the name of Terrorism of course.....😬) All Police forces all around Aust are fully encrypted, most capital ambulance & fire services are either fully encrypted or have the ability at the flick of a switch at a moments notice to be fully encrypted ( not counting the 2 x territories that I have already mentioned where 100% of all comms that are already fully encrypted ) All Australias roads authorities are fully digital & as above at a moments notice and the flick of a swith can be fully encrypted should they think or beleive that the need calls for it. All Australian security services ( alarm response / security patrols) are all 100% mobile phone & txt & or propriety apps for alarm codes etc. 99% of Australias media ( large tv & radio networks ) are encrypted / satellite with the smaller players just using mobile phones. All Australian free to air terrestrial TV is digital thoes out of range of free terrestrial Tv can receive free to air via Satellite on a network called Vast which is encrypted. Some local councils ( the smaller ones ) are still analouge in the clear but are very boring & again with most comms being passed over the mobile phone network, the big capital city councils are digital in some form or another. All Australian airports " operational staff like baggage handlers, check in staff, car parking & security are all 100% digital using various digital networks. The only thing that has never changed world wide with communications is aviation communications, they are the last man standing, they still use AM analouge between 108 & 136 Mhz for voice, data & navigation communications I am lost why it has been the same since WWII & I doubt will ever change. 90% of large shopping centers are digital. Am radio stations are making way for either Fm or DAB A large amount of amateurs now either use DMR or Dstar to communicate CTCSS is gone in Aust Here in Aust we have NXDN but hardley anyone uses it at this stage. So here in Aust for commercial & emergency service comms we mainly use Motobro Turbo Edacs Apco P1 & P2 X2-TDMA Mpt Pocsag DMR LTR Spread spectrum There's vitally no analog worth speaking of left that is worth listening to in Aust. Hope that helps give a little bit of an overview of comms in Aust. Regards Wayne.

Another very informative video.

I still remembering to the AP Network News on 948.5 Megacycles when I was a child. Then it went to digital and it just sounded like a buzzing. I miss the AP Network News.

You've just solved a mistery that has been bothering me since 1989

Great video! 😀

Very interesting thanks for taking the time

Brilliant video

Brilliant informative video. I’ve heard a good few of them sounds but didn’t have a clue what most were. M7BCN

Very interesting video, has answered a few questions.

Great video, I hear so many odd noises. I have DPMR working well with SDR# and DSDplus

Great Video Bro.

Great content Lewis 👍👏👏

Very interesting stuff. I've heard some signals in my area on my SDR but not much. I want to go to a large city and listen there for stuff.

Yeah i did enjoy that one it was very interesting. Nice one mate

Brill video I have just had a unidon 125 scanner so very helpfully to me well done many thanks

11:01 this tone rings bells

Great video now I know all of those noises I hear

Great video! Interesting even though I’m in the US. If you visit you should bring your scanners and do a video on US radio spectrum.

Please do more of these

@RingwayManchester >>> Great video...👍

Scanning PMR446 today I heard what sounded like Morse code on channel 16 . Never heard it before.

very informative video

👍 very interesting.

Amazing video 👌

THAT WAS BRILLIANT. You must put hours and hours into research.

Very interesting, but somewhat familiar to me, especially on my earlier scanners and on amateur radio transceivers in the 1970's and the 1980's before many of the pagers left the air in the 🇺🇸 US on 152 MHz and 454 MHz. Digital cell phones seem less of a problem at higher frequencies, though LTE sometimes causes problems as noted in filters for HD TV and FM. W2CH

Whats cool about tpms, is that the packet is sent multiple times at random spacings to deal with collisions from other sensors.

It has been a while, but years ago, I used to hear a sound in the 800's and 900's which sounded like someone keying the mic on a radio constantly at regular intervals. They were a second or so apart, and it was like it wentin to a repeater, because the carrier was constant. Think about the tailsquelch from the receiver when someone lets go of the mic when they are using a repeater. First, you hear the receiver disengage, then the carrier from the repeater continues for a few seconds before you hear the tailsquelch from your own radio. I don't remember the exact frequency, but I heard it on a few different ones, so these might have been images, making the exact frequency pretty much anywhere in the 700 to 1000 mhz area. I'm sure my scanners never picked up images from multiples of the if like some people claimed was possible. Another signal I heard has disappeared since the late 90's, but it was in the upper 460's, and it sounded exactly like the whipping you hear when a helicopter is flying over, but it was constant. These sounds persisted night and day, so it's possible that at least one of them is a signal that was created by my scanner it'sself, but I'm curious about what they are.

Very good video.

I agree with all the reviews. I knew what most of the sounds were.

Oh Lewis lots of Pops and squeaks up here on the 17th floor ive always wondered what these bursts of data were for. Marc in Bletchley Towers G6XEG

Not had the scanner out in years. Suppose my RSP1a has made it redundant, somewhat, though it’s not as portable.

Bardzo dobre, bardzo merytoryczny film, ale takich sygnałów jest dużo więcej

Very good video

Absolutely Brilliant! What frequencies do permanent traffic lights use to communicate via those little grey aerials? Cheers, David Walsh.

I’ve head quite a lot of EVP voices, the most famous (or should I say infamous) being ‘Radio Peter’. A lot of Ham enthusiasts have heard him, apparently he died in 1906 and has been heard on the airwaves since the mid-1970’s

Really cool video. Thank you. You don't see much tetra here in the former colonies - at least to my knowledge. Question: Could you do a video on your RF Explorer? I'm really interested in how you like that device.

7:50 sounds like a guinea pig skittering in its cage

i heard something that sounded like a broadcast where the original radio audio repeated like in mem leak and the beeping in some of these was randomly placed in the signal we live on our own land with nothing like the products in this it was scary as hell

Great video for building biologists! I appreciate your time and effort in making this really interesting and educating videos. I would really like to see more ' strange signals & weird noises' videos like the previous ones you have released. Kudos and greetings from Spain!

Very well done video. I'm not sure that Multitone paging is easy to decode. I'm quite skilled with SDR and it's been my experience that there are many pager variants in the 454 and 459 mHz bands and very few respond to decoding software such as PDW and Sorfmon. Am I missing something? Keep up the good work!

multi-tone paging is not decodable btw. no decoders exist in the non commersial space ast the moment

Add 902 for the car remotes in the US... Shits annoying as hell

I have a question. Can I listen to tetra with my discone if I connect it to my sdr stick or would another antenna be better? With the right software of course. Very clear video!

To be honest, I find digital signals a lot more interesting than regular transmissions.

It used to be fantastic listening to scanners and to short wave but times have changed.

How about doing a video on some wierd sounds on the HF band ?

Sounds like machine gun fire at MCR airport?

I was looking at what that scanner was scanning it looks like British CB frequencies are different from American CB frequencies?

I live near two pocsag paging antennas, did not know that you can hear them without an antenna, ill have to go see what i can hear

Interesting video. Anyone know what uses 6.522 Mhz in the U.S.? Very strong signal with almost full-silencing in my home.

I have two scanners and old Crystal scanner that I got for Christmas that was in 1984 and one I got my brother in 1995 that's a programmable scanner I hear most of those same things on the it sure is good to know what they are