Finally, some comments are made about calibration system requirements for implementing new measurement techniques. Next a description of ongoing research in calibration measurement methodology is presented. Measurement methods for calibrating transducers are then discussed. The data were collected as part of an effort to assess the impact of manmade underwater sound on Glacier Bays. DTIC ADA232073: Calibration of Underwater Acoustic Transducers at NRL/USRD Item Preview remove-circle Share or Embed This Item. These waves may be man-made or naturally generated. These compressions and rarefactions are detected by a receiver, such as the human ear or a hydrophone, as changes in pressure. It first covers the measurement facilities for performing the services. Center Detachment in Bremerton, Washington. A sound wave propagating underwater consists of alternating compressions and rarefactions of the water. This paper describes the calibration, test, and evaluation services. Calibration, test, and evaluation services and standard transducer loan service cover the frequency of 0.2 Hz to 2 MHz. Most widely held works by NAVAL RESEARCH LAB ORLANDO FL UNDERWATER SOUND REFERENCE DETACHMENT Some strip contributions to transducer design and. It functions as a National Bureau of Standards for Underwater Acoustics by providing two types of reference services for a fee. Acronym Meaning How to Abbreviate List of Abbreviations Popular categories. The Underwater Sound Reference Detachment of the Naval Research Laboratory evolved from this beginning and now serves as the focus for underwater acoustic metrology in the United States. What does USRD stand for USRD abbreviation stands for Underwater Sound Reference Division, Naval Undersea Warfare Center. He retired and lived in Garland Texas later in life.At the beginning of World War II, the United States recognized the need for establishing systematic methods for calibrating and evaluating sonar transducers and established the Underwater Sound Reference Laboratories. This award allowed him to continue his research at the Underwater Sound Reference Detachment of the Naval Research Lab at Orlando.ĭubbelday’s achievements include designing and constructing an acoustic tank facility, developing an aluminum-based material transparent to sound with a density equivalent to water, holding a patent for a ferrofluid transducer, authoring 45 publications, and still being greatly cited in research these days.Īside from his professional career, Dubbelday and his wife married in the Netherlands and raised two daughters in Florida. southern Tasmanian waters following Det Norske Veritas (DNV) guidelines in order to determine. Furthermore, he received the “Science Faculty Professional Development Award” from the National Science Foundation (NSF). MEASUREMENTS OF UNDERWATER NOISE FROM TH E RV INVESTIGATOR Alec Duncan 1, Rudy Kloser 2 and Matthew Sherlock 2. ![]() Dubbelday was an outstanding physics and oceanography professor at Florida Tech for twenty years (1961-1981) and was known for his intellect, integrity, and dedication to students, making him the Florida Tech Teacher of the Year in 1980 at the annual award ceremony organized by the Student Government Association (SGA).ĭuring his years at Florida Tech, he did not only serve as a professor, but he was also engaged in hydroacoustic research. Dubbelday earned his doctorate in nuclear physics from the Vrije Universitet, a university in Amsterdam, The Netherlands. Dubbelday establish an endowed scholarship fund in honor of the eminent Florida Tech faculty member.ĭr.
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