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Overview
The science of hearing is explained with animated diagrams of the human auditory system.
Details
- Status
- Released
- Release date
- October 20, 1940
- Original language
- English
- Countries
- United States of America
- Production
- American College of Surgeons
- Cast
- Douglas Harlon
- Budget
- Not recorded
- Revenue
- Not recorded
- IMDb
- View on IMDb