15 Minutes Before Takeoff: Single ding.

This is a call from the flight deck (cockpit) to the flight attendants asking them to pick up the phone. (Often this means, please bring us coffee.)

Yes I think its captain telling the crew that they can leave their seats but the seatbelt signs remain on for passengers. EDIT Though as Chris said it was very soon to hear the ding for crew to move. Perhaps the crew wanted to natter to one another.


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definitely not 15,000ft going down, unless you are landing at INN! 10 minutes to landing, or very occasionally sometimes 15, is much lower than 15,000ft. as noted on long haul it is a 20 minutes to landing call.

Anyone who's flown on an airplane is likely familiar with a dinging sound, usually heard once back on land. It turns out, the chime means much more than being able to take off your seatbelt. Additionally, passengers may have heard a "boing" sound and, on occasion, a two-toned combination of high and low tones that resonates throughout the cabin. With so many variations, travelers may be left wondering: What do these gentle sounds actually mean?

"Think of it as a language between the pilots and flight attendants," Southwest spokeswoman Thais Hanson told The Points Guy. "A chime also accompanies the lighting or extinguishing of a sign; for example, when the seatbelt sign goes off and customers are able to move about cabin to use the facilities or stretch their legs, this will be indicated by a chime. While I can't share all of our chime combinations and meanings, [the sounds] are used to signal to both flight crews and customers that an action is needed or has occurred."

Qantas uses a single chime to alert crew when a passenger is asking for assistance at their seat. A high-low chime combination is the sound of the crew calling each other on their in-flight phone system. Three low chimes in a row signals an urgent warning from the captain, like heavy turbulence ahead.

United Airlines, for example, sounds a single chime when a passenger calls for assistance and when the fasten seat belt sign turns on. A ding-dong sound means pilots and flight attendants are calling each other on the inflight call system, spokesman Jonathan Guerin told HuffPost.

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While looking for one to set as my ringtone, I became interested in the history of the cabin chime - the "bing-bong" noise heard on practically every commercial airliner today. I've found tons of downloads for the sound itself and a few posts by pilots and cabin crew on what different chimes or sequences of chimes mean, but nothing on its origin. Anyone?

The PA Amplifier equipment should include a chime generator capable ofproviding two tones in the four remote controlled sequences that maybe deployed through either the auxiliary or main amplifier utilizingaircraft strapping. Internal controls shall be provided to adjust theindividual tone levels for balancing the related outputs.

The chime tone harmonics should be minimized with the second harmoniclevel at least 30 dB below that of the fundamental and each succeedingharmonic should be a further 3 dB below the preceding harmonic.


If you've ever flown in an airplane before, you've probably noticed a variety of dinging sounds throughout the flight. Sometimes the sounds are obvious, for example, a ding when the seat-belt sign is turned on or off, but other times, the reason for the sound seems like a mystery.

A recent Huffington Post article revealed that those inflight dings are actually subtle ways for the pilots and crew members to communicate with each other. The article also revealed that each airline has its own unique ding system.

For example, in a blog post last year, Qantas Airways said they use the "'boing sound" right after take-off to alert crew members that the aircraft's landing gear is being retracted. A second "boing sound" is used when the seat belt sign has been turned off.

A spokesperson for United told the Huffington Post they use a single chime when passengers call for assistance, as well as when the seat-belt sign is turned on. Instead of a high-low chime, however, they use a "ding-dong" sound when pilots and crew members call each other.

Of course, each airline uses a customized system. According to the Huffington Post, United Airlines not only uses a single chime for passengers calling for service, but also to note that the seatbelt sign has been turned on or off.

As a part of an Arduino project for my car, I would like to include a pleasant sounding chime. I like using modules when I can instead of making everything from scratch. For example, I'll use Pro Mini, step down power supply, and relay modules. Is there a chime module or IC that produces a more pleasant sound that a plain beep from a piezo element or buzzer, similar to what modern cars have for a headlight reminder or key-left-in-ignition reminder? My Googling has not been fruitful in searching for one.

How about go old school and strike a chime with a solenoid? A bit bulky and power hungry but you can't beat a real chime with any digital approximation. I used to have a "Zen Alarm Clock"(actually it was my GF's, who was into that sort of new agey stuff) that had this sort of thing with a tuned chime. The only problem was it made an annoying buzz sound as the thing pulled the striker back against a spring before letting it go for the strike, I usually woke up to that instead of the nice chime. I've seen doorbell chimes that didn't do that though, on those the solenoid provided the strike impulse and the spring retracted the striker.

That is a fun idea. A household wired door bell may work off of 12VDC with no modification. I'll have to try that and see what I get. I'll have to pick high tone or low tone and remove or dampen the chime bar I don't want, because I don't really want a ding-dong alert.

The Adafruit sound effects board could work, if I can get R. Lee Ermy from "Full Metal Jacket" or Miss Gladys Stevens from "Andromeda Strain" to record for me the appropriate reminder to turn off the headlights when exiting the vehicle. R. Lee Ermy yelling at me for leaving the headlights on may be more pleasant than an average plain buzzer. Not much room under the dash or under the hood for the Tibeten Temple bell, although that does sound interesting. Perhaps striking the front fender from inside the engine compartment would be just as good.

One thing I've done when I could only make simple tones was to make a "musical" 3-note rising melody for a "pass-sound" and 3-note "non-musical" melody for a "fail-sound". If you've got a piano or keyboard handy you can try-out a few notes to find a sequence you like, then translate the [u]notes to frequency[/u] and program them with the tone() function.

Two adjacent notes (for example C and C#) sound "sour" when played together or in sequence. (That's called a half-step). But, if you skip a note (say, play C and D) together or in sequence it sounds pleasant.

If you are not familiar with musical notation try not to get confused by the sharps (#) and flats (b). For example, there is no E# so E-to-F is a half-step and those two notes will sound sour when played together. E-to-F# is a whole step. (And, all of the notes on the piano are a half-step apart, regardless of key-color.)

I paid a professional musician $40 to generate the sheet music for Star Trek Deep Space 9 from a tape recording of the theme at the beginning of the show. I took the sheet music to the library and looked up the frequencies for the 88-note equally tempered piano scale and used the frequencies to program a sound generator chip to play the entire 1 minute 35 second theme on a Heathkit ET-3400 for my DeVry Junior class Musical CLOCK project. i added a 3W audio amplifier chip and 6 inch speaker for "bells & whistles " credit.

License: Attribution 4.0 International (CC BY 4.0). You are allowed to use sound effects free of charge and royalty free in your multimedia projects for commercial or non-commercial purposes.

I'm practicing landing with circuits, starting with engines running (XP menu option) and just climbing to the first approach fix alt and vectoring to intercept the ILS. The FMC is programmed for the approach with no SID or STAR.

Yup, Supposedly people call for the flight attendant every 5 minutes. I've flown over 250 segments for work/business over the last decade and I hear this sound more on a single trans con in the sim than in all those other flights combined. Its extremely annoying, especially when flying the Zibo long distances. So annoying that I've completely stopped flying the plane. I've complained several times over the last couple years but the guy that did the audio pack (audiobird or something) isn't with the team anymore, so we're stuck with it as is. e24fc04721

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