Hear hear!

Image credits:
Syringe: By Photography by User: MrX, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=23193793
Typewriter: By Isipeoria – Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=16296017
Tuning fork: By Helihark – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18686251.
In the ear hearing aid: downloaded from Phonak.com.
Behind the ear hearing aid: downloaded from Phonak.com.
Stapes prosthesis: by Student30 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=60089724.
Semi-circular canals and cochlea: by Canaux_osseux.png: José Bragaderivative work: Ortisa (talk) – Canaux_osseux.png, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=10484227.
Cochlear processor: downloaded from cochlear.com