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  • Jamaica  (2)
  • ACOUSTICS  (1)
  • 1
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    Binaural room simulation (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: In every-day listening the auditory event perceived by a listener is determined not only by the sound signal that a sound emits but also by a variety of environmental parameters. These parameters are the position, orientation and directional characteristics of the sound source, the listener's position and orientation, the geometrical and acoustical properties of surfaces which affect the sound field and the sound propagation properties of the surrounding fluid. A complete set of these parameters can be called an Acoustic Environment. If the auditory event perceived by a listener is manipulated in such a way that the listener is shifted acoustically into a different acoustic environment without moving himself physically, a Virtual Acoustic Environment has been created. Here, we deal with a special technique to set up nearly arbitrary Virtual Acoustic Environments, the Binaural Room Simulation. The purpose of the Binaural Room Simulation is to compute the binaural impulse response related to a virtual acoustic environment taking into account all parameters mentioned above. One possible way to describe a Virtual Acoustic Environment is the concept of the virtual sound sources. Each of the virtual sources emits a certain signal which is correlated but not necessarily identical with the signal emitted by the direct sound source. If source and receiver are non moving, the acoustic environment becomes a linear time-invariant system. Then, the Binaural Impulse Response from the source to a listener' s eardrums contains all relevant auditory information related to the Virtual Acoustic Environment. Listening into the simulated environment can easily be achieved by convolving the Binaural Impulse Response with dry signals and representing the results via headphones.
    Keywords: ACOUSTICS
    Type: NASA. Ames Research Center, Human Machine Interfaces for Teleoperators and Virtual Environments; p 132-133
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Shallow water sponges of Jamaica (1998)
    In:  Beaufortia vol. 48 no. 5, pp. 71-103
    Details
    Publication Date: 2024-01-12
    Description: An annotated comprehensive list is provided of all shallow-water sponges (down to 60 m) recently collected and previously recorded from Jamaica. Five new species are described, Plakina jamaicensis, Melophlus ruber, Agelas repens, Stylissa caribica and Hyrtios tubulatus, two of which belong to genera not recorded before from the Western Atlantic (viz. Melophlus and Stylissa). The number of species recorded from shallow waters (reefs, mangroves and lagoons) now amounts to 157 species, several of which, however, are still of uncertain status.
    Keywords: Sponges ; Jamaica ; shallow-water ; new species ; checklist
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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    PAPER (OA)
  • 3
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    North Jamaican Deep Fore-Reef Sponges (1996)
    In:  Beaufortia vol. 46 no. 4, pp. 53-81
    Details
    Publication Date: 2024-01-12
    Description: An unexpectedly high amount of new species, revealed within only one hour of summarized bottom time, leads to the conclusion that the sponge fauna of the steep slopes of the deep fore-reef is still largely unknown. Four mixed gas dives at depths between 70 and 90 m, performed in May and June, 1993, at the deep fore-reef off the north Jamaican coast in front of the Discovery Bay Marine Laboratory, revealed a total of 27 demosponge species, ten of which are new to science.
    Keywords: Sponges ; deep-water ; fore-reef ; Jamaica
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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    PAPER (OA)
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