mechanoacoustic

The story

1. Proto-Indo-European*megʰ-der.?
2. Ancient Greekμηχανή (mēkhanḗ)
3. Ancient Greekμηχανικός (mēkhanikós)
4. Latinmēchanicus
5. Old Frenchmecanique
6. Middle Englishmekanyk
7. Englishmechan(ic)
8. Englishmechano-
9. Proto-Indo-European*h₂eḱ-
10. Proto-Indo-European*h₂ew-
11. Proto-Indo-European*h₂ṓws
12. Proto-Indo-European*h₂ḱh₂owsyéti
13. Proto-Hellenic*akóuhō
14. Ancient Greekἀκούω (akoúō)
15. Ancient Greekᾰ̓κουστῐκός (ăkoustĭkós)
16. Medieval Latinacousticus
17. Englishacoustic
18. English todaymechanoacoustic

From mechano- + acoustic.