Echo sounder
device · 1913 · Electric age
Measuring depth with sound (Behm).
What it is made of
- Hydrophone — has part. A hydrophone listens for the echo.
- Sonar transducer — has part. It sends out a sound pulse.
- Chart recorder — has part. It records the depth.
Principles and materials it uses
- Sound wave — uses. A sound pulse.
- Steel — is made of. The hull is steel.
History: what it evolved from and what it influenced
- Sonar — evolved into. Echolocation.