Question

How phones related to segmental phonology?​

Answer 1

Segmental phonology studies the way speech can be analyzed into discrete units, or segments, that constitute the basis of the sound system; and this, along with the analysis of the various phonetic features and processes which relate and differentiate these segments, is the subject-matter of this chapter.

Step-by-step explanation:

His made me wonder if "segment" is some kind of synonym for either "phone" or "phoneme", just some way to avoid using those terms, or some other concept all together.

Answer 2

In phonetics and linguistics, a phone is any distinct speech sound or gesture, regardless of whether the exact sound is critical to the meanings of words. ... In contrast, a phoneme is a speech sound in a given language that, if swapped with another phoneme, could change one word to another.