Results 11 to 20 of about 2,187,898 (350)

Communication in Cook Inlet beluga whales: Describing the vocal repertoire and masking of calls by commercial ship noise.

open access: yesJournal of the Acoustical Society of America, 2023
Many species rely on acoustic communication to coordinate activities and communicate to conspecifics. Cataloging vocal behavior is a first step towards understanding how individuals communicate information and how communication may be degraded by ...
Arial M Brewer   +4 more
semanticscholar   +1 more source

Model-based design of a novel modular mounting system: Light, compact, and efficient

open access: yesAdvances in Mechanical Engineering, 2022
Two-stage mounting systems applied in ships are expected to be light in weight, compact in installation space, and efficient in vibration isolation performance at the same time, which largely increases the engineering complexity.
Yuanran Qiu   +3 more
doaj   +1 more source

Numerical simulation of temperature variation in water layer induced by thermal jet in weak stratified environment

open access: yesAIP Advances, 2022
In order to explore the rising and diffusing path of an underwater thermal jet and the temperature variation of each water layer in the typical ocean thermohaline stratified environment, a three-dimensional mass-heat transport model of the thermal jet in
Feiyang Luo   +3 more
doaj   +1 more source

Experimental research on dynamic responses characteristics and influence laws of gear transmission-propulsion system under gear excitation

open access: yesZhongguo Jianchuan Yanjiu, 2022
ObjectiveIn order to study the dynamic response characteristics and influence laws of a marine gear transmission-propulsion system, a series of bench tests is carried out.MethodsFirst, a biaxial gear transmission-propulsion system test bench including a ...
Zhiwei HUANG   +5 more
doaj   +1 more source

Noise sources on ships and noise distribution inside the ship structure [PDF]

open access: yesVojnotehnicki glasnik, 2005
This paper presents noise sources on ships and the ways of its distribution inside the ship structure. The influence of structure oscillations on the noise intensity has been also explained. There is a review of noise spectrum characteristics of common ship engines, marine noise standards, noise protection equipment (overall, local and individual) as ...
Radosav Nikolic   +2 more
openaire   +1 more source

Acoustic characteristics of a cylindrical shell coupled to an acoustic cavity under complex excitations

open access: yesAIP Advances, 2022
In this research, we analyze the acoustic–vibration coupling of liquid-filled cylindrical shells under complex excitations. A calculation model to determine the acoustic characteristics and steady-state response of a cylindrical shell coupled to an ...
Suwei Yuan   +3 more
doaj   +1 more source

A New Multi-Mechanism Synergistic Acoustic Structure for Underwater Low-Frequency and Broadband Sound Absorption

open access: yesJournal of Marine Science and Engineering, 2023
The acoustic absorption characteristics of anechoic coatings attached to the surface of underwater vehicles are closely related to their acoustic stealth.
Kangkang Shi   +4 more
doaj   +1 more source

Vector acoustic and polarization properties of underwater ship noise.

open access: yesJournal of the Acoustical Society of America, 2022
Vector acoustic field properties measured during the 2017 Seabed Characterization Experiment (SBCEX17) are presented. The measurements were made using the Intensity Vector Autonomous Recorder (IVAR) that records acoustic pressure and acceleration from ...
P. Dahl, J. Bonnel
semanticscholar   +1 more source

Study on Acoustic Characteristics of a Flexible Plate Strongly Coupled with Rectangular Cavity

open access: yesShock and Vibration, 2021
This paper presents a method to predict the acoustic characteristics and steady-state responses of a flexible plate strongly coupled with rectangular cavity based on energy principle theory and Legendre polynomial series.
Jinlong Liao   +3 more
doaj   +1 more source

Tribological characteristics and mechanism of nitrile butadiene rubber coated with typical liquid lubricants

open access: yesPolymer Testing, 2022
When marine stern shafts operate under low speed and heavy load conditions, the metal shaft and water-lubricated bearing will be in a state of boundary lubrication or even dry friction.
Yinsong Liu   +4 more
doaj   +1 more source

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