Giant Human Ear Model, 5X Life Size Handle Type_Wood this metal wave apparatus pairs

this metal wave apparatus pairs the rotary handle with a degree scale so students can read phase against vertical displacement

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

and 3 rods for multi-configuration study

this 2-pack of 20oz Griffin-shape borosilicate beakers adds a pouring spout for everyday home use

Giant Human Ear Model, 5X Life Size Handle Type_Wood this metal wave apparatus pairsFive times enlarged ear model reveals cochlear canal, ossicles, and vestibular structures at visible scale for group classroom demonstrations of auditory anatomy.