projector projectoran instrument that sends out sound waves; consists of a transmitter and a transducer Related Articles: Glossary: array elementsWhat are common underwater sounds?How is sound used to find submarines?Tutorial: Projector (Sound Source)Airgun TechnologyMid-frequency Active SonarHow is sound used to monitor and defend harbors?Multibeam EchosounderHow are sounds made?Multibeam Echosounder Chris Knowlton2017-02-26T20:10:00-05:00