Source Level - Transducer

Question 1

Material: Moving Coil

Answer 1

Solenoid is attached to flexible piston.

Not suitable for underwater use due to low impedence.

Question 2

Material: Magnetrorestrictive

Answer 2

Magnetic field induces changes in shape or dimension and vice versa.

Not as good as piezoelectric.

Question 3

Material: Piezoelectric

Answer 3

Electric field induces changes in shape or dimesion and vice versa.

Most common in sonar.

Question 4

Material: Air Gun Array

Answer 4

Pneumatic chamber pressurized with compressed air, piston discharges air bubble into the water.

Question 5

Material: Explosive Charge

Answer 5

Just high explosive causing sound waves through water.

Question 6

What is a Hydrophone?

Answer 6

Used for receiving.

Question 7

Projector

Answer 7

Transmit only.

Question 8

Transducer

Answer 8

Transmit and receive.