Transducers as Hydrophones

Abstract

All the applications of underwater projectors described at the beginning of Chapter 3 also require the use of hydrophones. In most active sonar systems the same transducers serve as both projectors and hydrophones, but there are good reasons in some cases to use separate hydrophones for reception, (e.g., hydrophones in towed line arrays can be well removed from the ship's self-noise). In addition passive search and surveillance sonar, as well as passive ranging sonar, use only hydrophones. Passive sonobuoys and various noise monitoring functions also require only hydrophones.