What alert is indicated by a high-low chime ("ding dong")?

The high-low chime, often referred to as a "ding dong," is typically used in commercial aviation to indicate a communication from one flight attendant to another. This sound serves as a way for flight attendants to alert their colleagues that they wish to communicate something specific, whether it be about passenger service or operational matters that require attention.

In an aircraft setting, proper communication among crew members is crucial for maintaining safety and ensuring an efficient flow of service. The high-low chime effectively cuts through background noise and gets the attention of other flight attendants, allowing them to respond accordingly to whatever message is being conveyed.

While sounds from the cockpit, emergency situations, or other alerts may have specific tones or indications associated with them, the high-low chime is distinctly recognized within the context of internal communication among the cabin crew.