What Is The Strange Barking Noise Some Airbus Aircraft Make?
ฝัง
- เผยแพร่เมื่อ 5 ก.พ. 2025
- Airbus has enjoyed a successful period in the market recently, and the A320 and A330 have become extremely popular in the airline industry. But these jetliners do feature one intriguing quirk. Passengers on the A320 and A330 can expect to hear a barking noise emanating from the plane at some point during their flight! So what is the cause of this unusual barking dog sound?
Article link: simpleflying.c...
Barking dog sound: • AIRBUS BARKING DOG(PTU... of @BDQing
Video source links:
A320 us airways • US Airways N644AW A320...
A320 Alaska • Alaska Airlines A320 [...
A320 Indigo • A320neo Water Cannon S...
A320 Delta • Delta Air Lines N371NW...
A320 United • United Airlines N408UA...
A320 British Airways • Airbus A320-232 Britis...
A330 aerolineas argentina • Despega un nuevo año
A330-300 Delta • Delta Air Lines N810NW...
A330-200 Hawaiian • Hawaiian Airlines N381...
A330 fiji • 【4K】『激レア！！明るい時間のFIJI』フ...
Website: simpleflying.com/
Instagram: / simpleflyingnews
Twitter: / simple_flying
#Aviation #Flight #Avgeek
Dog barking? To me it sounds like very fast, very loud windscreen wipers lol
Totalu agree
Yas
True lol
@@leo-yk2wy You mean Totolo btw i think that it sounds like a windscreen wiper
More like a saw
Hi there, ex A320 engineering technical instructor here. A few little facts that weren't really mentioned. The hydraulic systems on the A320 are Green, Yellow and Blue. The PTU is connected between the Green and Yellow Hydraulic Systems and also operates when there is a 500psi differential between the Green and Yellow System. e.g green system drops from 3000psi to 2400psi and yellow is 3000psi the PTU operates. You may also here the PTU when raising the landing gear. This is due to when the valves open on the Green side of the system to pressurize the landing gear actuators there is a drop in pressure as the hydraulic lines need to be pressurized from the valve to the landing gear actuator. The pressure drop is sensed and the PTU operates to increase the green system to 3000psi. once at there is less that a 500psi differential the PTU stops operating.
Does this occur during the other phases of flight too such as when the pilot is maneuvering and configuring the airplane for a landing which would involve the application of pressure on ailerons and other control surfaces? That activity would set off some actuators too which would require the expenditure of hydraulic fluids, isn't it? Is it possible that during such times we just don't hear the PTU because its sound is drowned in the drone of the jet engines? I am curious to know. Thanks.
Back then I heard someone said "Now someone is sawing off the wings" while PTU 😂😂
Lol
it a plane. there r going to be a noise just put on headphone turn the music on... the airline hard insurance... if i die.. they had to paid alot of money to my famliy.. which is not a bad choice..
yess
Yeah I thought it sounds like that
Priceless! Sawing off the wings! LOL
It sounds like someone cutting wood with a saw
I agree, it sounds like someone cutting a piece of plywood with and old fashioned hand saw. Hard to believe fact.....up until the 1950's, if u went to a site where a house was beeing built, u would find at least one guy on the ground who was working his ass off with a hand saw at all times.
YUL Aviation … thank you. Does NOT sound like a dog barking. Agree sawing wood.
I thought the same. Maybe like when done with a hacksaw.
I did a ton of woodworking as a kid and that sound has become incredibly distinctive to me, hearing it makes me instantly think of sawing through wood and it feeling like it's getting nowhere.
That's what I was thinking.
Try flying in the back of a C130, you’ll hear the whole zoo
Any videos?
So like a Rainforest Cafe?
LOL, and smell it too!
I miss flying on military transports.
Whaaaaat? I can't hear what you're saying.
Sounds like someone's enjoying the mile high club😂😂
Sounds a bit... friction-y
Lol
Wow just wow
Doggy style
I Rarely Railfan lol
Sounds more like someone sawing a plywood below plane rather than barking
or possibly a large fan blade rotating .
Ian moseley I would be really worried if it were that 😳
Stick Bug stick bugged lol
Hydraulics are on that's all
I might be weird, but I love the noises that Airbus's make. That high-pitched whine at the gate is 👌!
That mixed with the smell of jet fuel is absolute heaven
Josh Francis, speaking of jet fuel... in Russia, bears are hooked on going to airports and sniffing jet fuel until they pass out. Are you a Russian bear? You said you love the smell of jet fuel!
TheSpanishPotato damn no need to expose me like that
TheSpanishPotato Nice profile pic. Is that Fury 325?
Same
PTU test after engine 2 start 👌🏼.
Fun fact, we don't hear it in the cockpit, we only have a memo on the ECAM telling us the test is being performed
@Captain Samuel Aviator We do hear sometimes people clapping upon landing lol
A320 doesn't give us a memo during the test.
@@tonyb8066 wanna bet?
@@Top10Aviation Sure.
Do you hear the buzzsaw noise from the fanblades during takeoff from the cockpit?
no that's just the emergency dog in the dog compartment.
this is a tragically underrated comment 😂
Break in case of emergency
The Vulcan bomber actually has a component called the Dog. It is the APU made by Rover, hence dog. And the Ram Air Turbine (the other emergency power source) is the RAT, hence RAT and Dog.
How about “Bark in case of emergency”
Ah yes...my two favourite things
Airplanes and dogs
It's not United's I tell you that
Sorry if you don't like this joke
hey RedNightFire remember me? i replied to ur comment on a DJ's aviation video a while back lol
Ismail Ansari Sorry I don’t remember. Sup?
@@rednightfire2655 nothin jus sayin hi cuz i remembered u
hope u get to fly soon since u mentioned u hadn't in many years
Yes, I heard this sound a couple of times. It is not high pitch, fortunately, however of high volume or amplitude, which poses no problem for me.
Ahh this made me so nostalgic, before the pandemic I usually flew on an a321 once a month or so. The very first time I heard it I was alarmed and asked the flight attendant next to me what it was, she said it was the captain’s ex-wife😂😂 think about that every time now!
As someone who always flew on Boeing aircraft for the longest time, believe me when I first heard this sound I freaked out.
Yes, I’ve heard that sound, but I was never worried about it. I always thought it was some sort of test the plane made before taking off, and it looks like I wasn’t too far off.
hmm i thought it was the sound of either flaps or smth too
As a flight attendant, I always hear this noise mid cabin on 320, 321, after landing. I always thought it's weird 😁 Pax are looking at me like..."😳"
Ha Ha Ha !!
Only after they shut an engine down. They can eliminate the sound by turning a "y" (yellow system) pump on. Ask them to turn the yellow electric pump on afer they shut the engine down while taxiing. They’ll $hit their pants with your knowledge.🙂🤣
noticed last week a clank, clank, clank noise on a Delta airbus, noisy planes
I don't understand why this only occurs on Airbus but never on Boeing aircrafts.
Every summer I fly A321 and I was wondering what that noise was about😅
I recently made my first flights on Airbus aircraft, and I did hear this sound, and wondered what it was. Thank you for explaining.
i ususally tell the passenger next to me thats the pilot sawing some wood to repair a main bulkhead in the cargo hold that tends to weaken
That must make some people terrified
R Alti Nice dad joke
Funniest part is the pilot performing any work on the plane 😂
R Alti, Nice one. Laugh-out-loud stuff . . .
@@dinkleburg6039 you sure know a lot about what pilots do
Always thought it sounded like they're trying to start the plane but it's got a dead battery
Heard it on every Airbus flight I've ever made, always just before docking. Always thought it was hydraulics, but now you made it clear. thank you.
Ah yes simpleflying,
I saw the very same topic video by @Captain Joe
And you guys even explained it quite well! Thankyou!
Yeah, I have heard it before, it was on a Qatar Airways A319-112 A7-CJA and A7-CJB, first time I heard it, I was like what in the world, I asked the technical staff onboard who told me about the PTU. It was just before pushback tug would push the aircraft from the ramp to the parking area on the airport's outskirts and vise versa when the aircraft was towed back before departure. The pilots also operated the PTU as the aircraft shuts down at the gate though I never heard it in flight. I was working as an Airport Service Agent for QR in SEZ at the time and part of the job was to secure the aircraft. Also got the chance to hear the same thing when they started operating the A330.
The drivers don’t operate the ptu on the gate. You will hear it on shutdown as one of the systems try’s to maintain 3000psi
As cabin crew on A320s, the barking dog is underneath me while I’m doing the safety demo while standing at the overwings. After the demo, I tell the passengers with anxious faces looking at me, “The ground crew forgot to feed the guard dog downstairs. He’s guarding all your suitcases down there.” They’re not anxious anymore 😊
Of course I tell them what it really is when they ask me!
That's the sound of making baby planes.
LOL
J.J. Schlachtfeld this comment is underrated !
I was playing Microsoft flight sim 2020, and was like, "What the heck is that?!"
Same
And given you can't hear it in the cockpit it shouldn't be there in the sim.
I recently flown the A320-200 and heard the barking and whining noise. The second I heard it I already knew what it was after watching this video
0:26 Sounds like an old Freightliner starting up.
Sounds kinda like my old W123
Many a time that sound had sent shiver down my spine! Thanx for explaining🤗
I always thought it was the landing gear raising & lowering since everytime I've heard it, it's been right after takeoff & before landing, so thx for clearing that up. 😉👍👍✌
Thanks for your sharing 👍
I have experienced this and its quite frightening on board. I thought it was landing gear retracting post takeoff.
Thanks, Often thought someone's dog was below :)
Thanks for this. The carrier that serves my smaller city doesn't fly Airbuses, and it seems I'm usually on Embraer or Boeing. Recently I was able to fly on an Airbus and indeed, I heard this noise very loudly and for quite a long time. No one around me seemed concerned so I figured it was normal, but I'm happy to learn what it is.
I traveled so much on adventures in years past that hearing the sounds of the cargo doors being slammed shut and latched brought me instant joy.
Heard this noise before and never really thought anything of it
I love how you guys answered the question I never even knew I wanted to know the answer to...
As a member of the cabin crew who regularly works on both the A330 and the A319/20, I have had many passengers ask me if a dog is in the cargo. I think you begin to ignore it or drown it out after working on these planes for so long.
As usual simple and informative👍
Guy rubbing a bandsaw against the rudder: It's a barking dog noise
Yes, and it is good that you pointed in detail her out to the public.....
I’ve had that noise annoyingly ring through my ears during taxiing out of Paris CDG on and EasyJet a320
I have heard both noises recognized the 2nd sound but not the barking sound. Now all clear. Thanks
Sounds like someone is cutting your flight wings with a saw.. have a safe flight..
Fantastic video, congratulations!
When I was young I thought it was the flaps
Me too
A lady's flaps shouldn't make a noise.
@@markfox1545 boeing planes do with their flaps
Yeah, I though it was something to do with hydraulic motors extending or retracting the flaps
@@Noaddedsalt01 - it was a joke, a joke about ladies having flaps on an intimate part of their bodies. Why are you responding to my joke by talking about Boeing aircraft flaps - haven't you had sex with a female?
as I almost only flew airbus aircrafts in my life, I always thought it was a completly normal phenomenon each plane has. I thought it was the sound of the landing gear retracting and deploying, nice video
That's the best thing about the Airbus.
The A350 has a nice noise when extending/retracting flaps. might seem annoying to some but for me it's like hearing the approach prep.
“Woof Woof! i spotted another 737 or 787!”
Why not pick a different noise?
-K. Pilkington.
I've heard this sound dozens of times by now, really cool to know what it is!
It's a dog that airlines have to keep in the bay of ever flight in the a320😉
At United, they have to get a new one after every flight.
Its not limited to only 320s btw
@@christopherbiggs4019 Horror at 37,000ft?
Aaah!! Dogs on a Plane!!
@@christopherbiggs4019 yes😂
The power transfer unit?
*Not barking, not wiping, not sawing, its someone's old bed!*
The best video about aviation. And yes. The barking sounds. Several times. Is Avianca flights. A330. And A321.
Hear it all the time.pretty much guessed that it was hydrolic stuff, but did not know about the PTU. Love making others on the flight feel unconfortable by saying : This noise is not normal.... there must be a problems with the engines... I hope they do not decide to take off anyway... Sometimes they take the risk... ( watch the old lady sitting on the other seat change color...) :D
I saw the title thinking, "I've flown on plenty of these and have never heard that noise!"
And then the sample hit. Boy was I wrong.
Hi, I have heard this many times .. I have almost always heard them on the ground at the gate before push back.. I thought they are trying to start the engine like in a car 🤣. Mahesh, India
I thought the same as well
I havent flown irl in so long I completely forgot about this!
U may also hear a groaning sound at the gate lounge. That’s the sound of passengers when realising they’re boarding an a320 😂
The A-320 to me is like sitting in a sardine can.
@@CaliforniaFly strange. I've flown A320 and it was OK. 737-800 was a real sardine can, SUPER uncomfortable. Now, the Embraer 190.. that one is really spacious. But like everything, I suppose it all comes down to whatever the airline decides.
Then you hear cheers when they find out they were going to fly a boeing, but it was changed to an AIRBUS.
Heard the noise many times on Airbus, the crazy thing is I knew exactly what it was from the sound of it.
It sounds exactly like what it is - a pump operating momentarily to top up pressure. Logic tells you that it would be the hydraulics since these are in high demand during takeoff.
Sounds like every teenager's bedroom afterhours.
Which song?
*oof.*
I've always wondered what made that sound! thank you simple flying!
Those in no way sound like barking dogs 😂😂
Great information
Wait I thought Boeing was meant to Bark and airbus meow 🤣🤣
Nah, boeings go crash
Barking dog sound means for me the beginning of vacation ❤️
I always thought it was a couple of passengers doing it in the bathroom!
Heard this many times
You should only be concerned when you hear it going whilst in cruise
So good to finally have the answer to a question I have been living with for a long time! Thanks.
nooo its just someone messing with suitcase zippers( ͡ʘ ͜ʖ ͡ʘ)
That cracked me up!!!
🤣🤣🤣
have only flown twice on 320's, but noticed a large number of noises coming from under the floor. I figured they were all related to control surface actuators on the wing as i was sitting right above it. With all the work that went into designing those aircraft, you'd figure that the engineers would consider it something passengers would rather not be hearing and design the controls differently. One constant noise sounded a bit like landing gear doors banging. Plane had a nice comfortable interior, but the noises were not at all comforting. And I'm used to flying on 737's and some turboprops!
It has virtual dog that barks whenever it sees a Boeing in the sky or on the ground :D
NEO's still seem to do this. It seems Airbus was very nostalgic about the year 1986 when they started building the A320 and who could blame them - it was one of the best years out there.
It’s a cat barking duh 🙄
Brock and Effie It’s the dog employed to stop the pilots from touching anything. M.
🐕
i fly a a320 at IndiGo and it is a very detailed explanation, great work
Meow 737
Dog a320
Its the sound of the doors NOT falling off...
Everytime i heard it i thought someone was wiping the windows really loudly
I've heard this sound a few times on IndiGo Airbus A320s. Thank you for this explanation.
sounds more like somebody is sawing the tail section off
Had a friend who flew in an A320 who sat next to a carpenter the same flight. When the PTU went off, the carpenter said, "Someone's sawing wood, and it's definitely not me."
PTU
Yes, i have heard this sound when flying in an airbus a320 and it sounds more like someone sawing a wood with a manual saw.
It sounds very strange and some people got even surprised and concerned with the noise.
Sounds like people entering the mile high club
I did hear this sound every time before the plane's going to brake short at the taxiway, and that was my first time riding an A330!
It was an awesome experience!
Yes, I have sat over the wings of an A320, and more than once I have heard that noise. I thought it was probably something to do with the plane's hydraulic systems keeping up to pressure.
So glad to find this video. I’m such a nervous flyer and I’ve only heard this somewhat recently despite being on many many flights! I was so scared! 🥲
i was never worried i was actually so happy to go flying because of this noise to me it sounds soo calming and like idk.
What a great video, as a regular EasyJet passenger over many years I have often wondered what makes this strange noise, in future I will know.
Thanks for the feedback! - TB
Heard it many times, always took a nervous look at the flaps!
Yes! Thank you, I’ve always wondered what that was.
At last. Thank you for educating the people. I captain the 320 and am fed up with that question
Thank you this video answers the question of what I heard when I flew to California on a Virgin America flight to San Francisco
I have always wondered!! I never even know how to describe the noise. A barking dog noise, ingenious!
The A-320 PTU....know it well. I test it every single day. Have worked for Triumph Aerospace for 20 years, spent the last 18 testing the PTU for Airbus. It's a finicky pump/motor....but we are the only supplier for Airbus. If you hear it barking, it's doing it's job. I do music stuff on the side, hence my user name. Cool video!
And this is a good reason why we inform the cabin crew if we are performing a single engine taxi, as the PTU sound can be mistaken by passengers as a fault, which might cause panic/anxiety. The cabin crew, armed with this information, can inform the passengers this is normal.
Love that sound, reminds me that I am on a fantastic A32x and boy, It gives me peace of mind.
It's the power transfer unit. Simply put it's a hydraulic unit consisting of a fixed flow pump connected mechanically to a variable flow pump that interconnect two of the three hydraulic systems. At the first engine start this unit provides hydraulic pressure to the units that are fed by the other engine hydraulic pump. Cargos doors actuation inhibit the power transfer unit from operating, unless the electrical pump is activated by the flight crew.
The primary function of this unit is to provide hydraulic power in case of an engine out (as the engine driven pump will be inoperative too) as this unit is bidirectional any engine out on any engine will not result in an inoperative hydraulic system, assuring full control of flight surfaces and landing gear extension.
Yeah actually went to Raleigh to Orlando and heard this noise after landing and before take off.It was slow both times I flew but it was quite annoying as it goes on for like almost 5 minutes or sometimes 10.Cool to know that its just hydraulics doing their magic.