@Eman linguist,
It's many years since I was a researcher in experimental phonetics, but basic distinctions
can be made between physiological parameters, acoustic parameters, and perceptual parameters. However terms used by phoneticians do not necessarily observe those distinctions because different models of speech production define segmental "targets" in different ways (phonemic, syllabic ,semantic etc), such that "vagueness" may be inevitable.
I suggest you re-read the definitions of those terms and attempt to evaluate them in terms of the parameters I have suggested.