What does the term "audible" describe?

The term "audible" refers to something that can be heard. This definition is rooted in its usage in various contexts, particularly in sound and sound production. When something is described as audible, it indicates that it is at a volume level that allows human perception, meaning that it can be detected by the ear.

In contrast, the other options suggest different characteristics of sound. "Impossible to hear" denotes sounds that are beyond the threshold of human hearing, such as very high-frequency sounds that some animals can detect but humans cannot. "Soft and quiet" describes a specific type of audible sound that is low in volume, but it does not encompass all that is audible; many sounds can be loud while still being considered audible. Lastly, "always loud" inaccurately suggests that being audible is synonymous with being loud, which is not the case. Overall, the defining characteristic of something being termed "audible" is its ability to be heard, regardless of its volume level.