acousticophobia

The story

1. Proto-Indo-European*h₂eḱ-
2. Proto-Indo-European*h₂ew-
3. Proto-Indo-European*h₂ṓws
4. Proto-Indo-European*h₂ḱh₂owsyéti
5. Proto-Hellenic*akóuhō
6. Ancient Greekἀκούω (akoúō)
7. Ancient Greekᾰ̓κουστῐκός (ăkoustĭkós)
8. Medieval Latinacousticus
9. Englishacoustic
10. Proto-Indo-European*bʰógʷos
11. Proto-Hellenic*pʰógʷos
12. Ancient Greekφόβος (phóbos)
13. English todayacousticophobia

From acoustic + -o- + -phobia.