[Noise in fishing vessels]
Alessandro Peretti1, Pietro Nataletti, Paolo Bonfiglio
1Scuola di Specializzazione in Medicina del Lavoro, Università di Padova, Padova, Italy. alessandro.peretti@unipd.it
Abstract:
The present research concerns the noise analysis of five vessels during navigation and fishing activities. In locations where staff operates, sound levels (produced substantially by the engine) were close to 90 dB(A); within the rest areas the noise is also quite significant. On the basis of working time, exposure levels ranged between 80 and 90 dB(A). In order to identify interventions able to reduce the risk, reverberation times, sound insulation of the different areas and the vibrations produced by the engine were measured on the same vessels docked in port. Noise level reduction as a result of sound absorptive treatments were estimated using an analytical model.
Related Concept Videos
01:06Tidal Forces
00:53Sound Waves: Interference
01:07Damped Oscillations
Although friction and other non-conservative...
01:30Equipments Used To Measure Blood Pressure
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...