Is there a specific auditory reason for which a labiovelar such as "kʷ" becomes a "p" sound?This could also be applied to the change in Latin from "duellum" to "bellum"

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    The title sounded like the development from [w] to [β̞] to me, because [w] is equally labial and velar. [kʷ] has velar closure but only labial approximation. – tobiornottobi Dec 30 '18 at 12:40
  • @tobiornottobi You're right,I fixed it – X30Marco Dec 30 '18 at 12:45

I would say you hear the labialization (I think a lower F2) and you hear the plosion. These features are shared with [b] and [p]. The lack of voicing of [k] is further shared with [p] and the voicing of [d] is shared with [b].

  • Low F2 is only observed with rounded labial. This can only be explained with an articulatory analysis, where some distinctive features are lost because of the principle of least effort. – amegnunsen Dec 30 '18 at 17:43
  • @amegnunsen As far as I know, lip rounding also lowers the F2 of front vowels etc. – tobiornottobi Dec 30 '18 at 18:27
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    Yes, I am saying the same thing. You are talking about [p] and [b], but these consonants don't have rounded lips. – amegnunsen Dec 30 '18 at 18:51
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    @amegnunsen Ah, okay. That's a good point. They don't have rounded lips but closed lips. And you are saying, closing the lips fully does not lead to a lowered F2. What I assumed was that lip rounding (especially compressed) and lip closure had similar acoustic properties and that after breaking the closure the lips are likely to not be spread. I could be wrong, though. – tobiornottobi Dec 30 '18 at 19:05
  • Perceptually, I don't think so. pʷ/bʷ are common sounds, so kʷ will become one of them instead of p/b. – amegnunsen Dec 30 '18 at 19:30

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