What does the term "call from cabin to flight deck" indicate in terms of sound?

The term "call from cabin to flight deck" refers to the specific auditory signal that indicates communication from the cabin crew to the flight crew. In this context, a high-low chime is typically the designated sound used to alert the flight crew that a call is being made from the cabin. This distinct sound helps ensure that the pilots recognize the importance of the communication, prompting them to pay attention to any messages or requests coming from the cabin.

Other sounds, such as a triple low chime or a single tone chime, serve different functions or indicate different types of signals within the aircraft communication system but do not specifically denote a call from cabin to flight deck. The absence of sound in the cabin would also not represent a call, as it suggests that there is no communication taking place at all. Thus, the high-low chime is the correct indication for this type of call, as it serves as an effective alert for the flight crew to be aware that their attention is needed for cabin-related matters.