Underwater sound reference detachment code#

Such subordinate activities will indicate the Unit Identification Code of the major command in parentheses, e.g. Have you found the page useful Please use the following to spread the word: APA All Acronyms. Am., in press, (1990).* An asterisk indicates a two-digit code of a major command, which is shared with subordinate activities. Blue, “A planar array for the generation of evanescent waves,” J. Van Buren, “Spherical nearfield calibration array for three-dimensional scanning,” J. Tims, “A 5-to 50-kHz synthetic cylindrical nearfield calibration array,” J. (2021) constructed a dataset of broadband source levels (SLs) from only 17 studies, for 11 ‘Vessel Types’. Reviewing the published literature, Parsons et al. Van Buren, “Cylindrical nearfield calibration array.” J. Additionally, there is a general lack of reliable measurements of noise radiated by small boats. Luker, and J.F.Zalesak, “Free-field acoustic calibration of long underwater acoustic arrays in a closed chamber,” submitted to J. Scott, “Automated digital benchtop calibration system for hydrophone arrays,” J. Am., 62, 91–101 (1977).Ī description of this method is given in the reference by L.D. Trott, “Low-Frequency technique for the underwater calibration of individual elements of a line hydrophone array,” J. Ainsleigh, “Stepped sine response modeling using noisy sampled data,” NRL Memorandum Report No. Ainsleigh, “A constrained Newton algorithm for maximum likelihood modeling of sums of exponentials in noise,” Proc. Ainsleigh, “Estimating steady-state response of a resonant transducer in a reverberant underwater environment,” Proc. Robinson, “Use of the complex exponential expansion as a signal representation for underwater acoustic calibration,” J. USRD Transducer Catalog, April 1982, Naval Research Laboratory, Underwater Sound Reference Detachment, P. Beranek, Acoustic Measurements, Wiley, New York (1949). Van Buren, “Phase calibration of hydrophones,” J. Cook, “Absolute pressure calibration of microphones,” J. The reference pressure value for sound underwater is 10.

MacLean, “Absolute measurement of sound without a primary standard,” J. NRLUWSREFDET stands for Naval Research Laboratory Underwater Sound Reference Detachment. attachment/detachment electrical and moorings connections allows for an ease of. Government Printing Office, Washington, D. Bobber, Underwater Electroacoustic Measurements, U. This process is experimental and the keywords may be updated as the learning algorithm improves. These keywords were added by machine and not by the authors. 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. It first covers the measurement facilities for performing the services. This paper describes the calibration, test, and evaluation services. Calibration, test, and evaluation services and standard transducer loan services cover the frequency range of 0.2 Hz to 2 MHz. 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, it functions as a “National Bureau of Standards for Underwater Acoustics” by providing two types of reference services for a fee. At the beginning of Worid 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.