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pro vyhledávání: '"Richard M. Heitmeyer"'
Autor:
Richard M. Heitmeyer
Publikováno v:
The Journal of the Acoustical Society of America. 119:3676-3693
We present a probability law on both the noise field and the beam-noise time waveforms that is based on the assumption that the breaking-wave occurrences are described by a space-time Poisson process and that the breaking-wave waveforms are independe
Publikováno v:
Marine Technology Society Journal. 37:54-65
This paper addresses shortcomings in the ability to predict either current levels of the ambient noise generated by shipping or future trends in those levels that might result from changes in the world's shipping fleet. In particular, experimental ev
Autor:
Richard M. Heitmeyer, Steven L. Means
Publikováno v:
The Journal of the Acoustical Society of America. 112:481-488
Range-time-frequency distributions of surf-generated noise were measured within the surf zone during the SandyDuck'97 experiment at Duck, NC. A 24-phone, 138-m, bottom-mounted, linear array located along a line perpendicular to the shore at a depth o
Autor:
Stephen C. Wales, Richard M. Heitmeyer
Publikováno v:
The Journal of the Acoustical Society of America. 111:1211-1231
This paper presents an evaluation of the classical model for determining an ensemble of the broadband source spectra of the sound generated by individual ships and proposes an alternate model to overcome the deficiencies in the classical model. The c
Autor:
Richard M. Heitmeyer, Steven L. Means
Publikováno v:
The Journal of the Acoustical Society of America. 110:761-768
Bubble cloud resonances have been proposed as an explanation of the low-frequency acoustic radiation produced by breaking waves. A previous model [H. N. Ogũz, J. Acoust. Soc. Am. 95, 1895–1912 (1994)] considered excitation of the bubble cloud by a
Autor:
Paul Scrimger, Richard M. Heitmeyer
Publikováno v:
The Journal of the Acoustical Society of America. 89:691-699
This report presents a set of 50 source spectra obtained from merchant ships of opportunity near Genova, Italy. The source spectra were calculated from radiated‐noise spectra measured on a towed array together with a transmission‐loss spectrum co
This report describes differences in the ship-induced, bearing-elevation, noise directionality obtained from different noise models and interprets those differences in terms of the propagation and the environmental components of those models. The two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17786b4e789c0fa35179615a69c1d55e
https://doi.org/10.21236/ada473782
https://doi.org/10.21236/ada473782
Autor:
Richard M. Heitmeyer, Stephen C. Wales
Publikováno v:
The Journal of the Acoustical Society of America. 129:2366-2366
Ship‐radiated noise is the principal source of noise in the 20–300 Hz frequency regime. This presentation provides a review of the issues relating to measuring ship‐radiated noise source levels and predicting the source levels from ship paramet
Autor:
Richard M. Heitmeyer, Steven L. Means
Publikováno v:
The Journal of the Acoustical Society of America. 128:2278-2278
The first at‐sea measurements capable of spatially resolving the individual breaking wave contributions at frequencies below 400 Hz, where collective bubble oscillations are believed to be the dominant sound generation mechanism, were conducted in
Publikováno v:
The Journal of the Acoustical Society of America. 127:1818-1818
In August of 2007 a long (∼1‐km), 500 phone linear array began collecting acoustic data in the waters (∼260 m in depth) approximately 12 km off the coast of Fort Lauderdale, FL. The array consisted of four, 125‐phone segments deployed closely