Practical Techniques for Reducing the Underwater Noise Pollution Generated by Commercial Ships

2012 ◽  
Author(s):  
M Renilson ◽  
◽  
R Leaper ◽  
O Boisseau ◽  
◽  
...  
Keyword(s):  
Noise Pollution ◽  
Underwater Noise

A REVIEW OF PRACTICAL METHODS FOR REDUCING UNDERWATER NOISE POLLUTION FROM LARGE COMMERCIAL VESSELS

2021 ◽  
Vol 154 (A2) ◽  
Author(s):  
R C Leaper ◽  
M R Renilson
Keyword(s):  
Noise Pollution ◽  
Operating Conditions ◽  
Wake Flow ◽  
Underwater Noise ◽  
Data Set ◽  
Marine Life ◽  
Propeller Design ◽  
Widespread Agreement ◽  
Noise Measurements ◽  
Considerable Concern

Underwater noise pollution from shipping is of considerable concern for marine life, particularly due to the potential for raised ambient noise levels in the 10-300Hz frequency range to mask biological sounds. There is widespread agreement that reducing shipping noise is both necessary and feasible, and the International Maritime Organization is actively working on the issue. The main source of noise is associated with propeller cavitation, and measures to improve propeller design and wake flow may also reduce noise. It is likely that the noisiest 10% of ships generate the majority of the noise impact, and it may be possible to quieten these vessels through measures that also improve efficiency. However, an extensive data set of full scale noise measurements of ships under operating conditions is required to fully understand how different factors relate to noise output and how noise reduction can be achieved alongside energy saving measures.

scholarly journals Underwater Noise for a Variety of Traditional Fishing Boats in Cilacap Waters, Indonesia

2021 ◽  
Author(s):  
Amron Amron ◽  
Rizqi Rizaldi Hidayat ◽  
Maria Dyah Nur Meinita ◽  
Mukti Trenggono
Keyword(s):  
Noise Intensity ◽  
Noise Pollution ◽  
Underwater Noise ◽  
Main Contributor ◽  
Fishing Boat ◽  
Noise Characteristics ◽  
Noise Frequency ◽  
Traditional Fishing ◽  
Engine Type ◽  
Broadband Frequency

Abstract As the main contributor to noise pollution in Cilacap waters, the noise characteristics of traditional fishing boats based on distance are very important to be studied. This research aimed to determine noise intensity and frequency based on the distance for each traditional fishing boat (3, 5, and 10 GT). The results showed that these boats emitting noise with broadband frequency and receive levels reached 153 dB re 1 μPa. The noise characteristics were different for each type of ship due to differences in the size, engine type, and operational speed. The receive level had the same decreased pattern based on the distance for each noise frequency, but with a different intensity. Meanwhile, the noise frequency had increased quadratically based on the distance, where the higher frequency, the greater change so that the noise was not detected faster.

scholarly journals El ruido en el mar: ¿es necesario abordarlo desde el principio de precaución?

Bioderecho.es ◽  
2021 ◽  
Author(s):  
Esteban Morelle Hungría
Keyword(s):  
Precautionary Principle ◽  
Environmental Law ◽  
Noise Pollution ◽  
Ecosystem Approach ◽  
Underwater Noise ◽  
Complex Situation ◽  
The Precautionary Principle

El ruido en mares y océanos es uno de los más complejos contaminantes que existen y ello es una muestra de la necesidad, imperiosa, de que juristas se pongan a analizar tal compleja situación desde un planteamiento ecosistémico y a escala multinivel. Vemos como la contaminación acústica subacuática dispone de mecanismos e instrumentos jurídicos de control y regulación, sin embargo, parece que todavía los impactos que generan son de tal intensidad que existen ciertas lagunas, quedando mucho por descubrir. Desde este posicionamiento analizamos la necesidad de seguir bajo el prisma del principio de precaución o bien, priorizar sobre otro de los principios funcionales del Derecho ambiental, el de prevención. Underwater noise is one of the most complex pollutants that exist and this is a sign of the imperative need for jurists to analyze such a complex situation from an ecosystem approach and on a multilevel scale. We see how underwater noise pollution has mechanisms and legal instruments for control and regulation, however, it seems that the impacts they generate are still of such intensity that there are certain gaps, leaving much to discover. From this position we analyze the need to continue under the prism of the precautionary principle or, to prioritize over another of the functional principles of environmental law, prevention.  

Effects of Underwater Noise Pollution on Lateolabrax japonicus

2021 ◽  
Vol 24 (4) ◽  
pp. 274-281
Author(s):  
Beomgi Kim ◽  
Junghyun Lee ◽  
Gayoung Jin ◽  
Changkeun Lee ◽  
Jong Seong Khim
Keyword(s):  
Noise Pollution ◽  
Underwater Noise ◽  
Lateolabrax Japonicus

A Review Of Practical Methods For Reducing Underwater Noise Pollution From Large Commercial Vessels

2012 ◽  
Vol 154 (A2) ◽  
Keyword(s):  
Noise Pollution ◽  
Operating Conditions ◽  
Wake Flow ◽  
Underwater Noise ◽  
Data Set ◽  
Marine Life ◽  
Propeller Design ◽  
Widespread Agreement ◽  
Noise Measurements ◽  
Considerable Concern

Underwater noise pollution from shipping is of considerable concern for marine life, particularly due to the potential for raised ambient noise levels in the 10-300Hz frequency range to mask biological sounds. There is widespread agreement that reducing shipping noise is both necessary and feasible, and the International Maritime Organization is actively working on the issue. The main source of noise is associated with propeller cavitation, and measures to improve propeller design and wake flow may also reduce noise. It is likely that the noisiest 10% of ships generate the majority of the noise impact, and it may be possible to quieten these vessels through measures that also improve efficiency. However, an extensive data set of full scale noise measurements of ships under operating conditions is required to fully understand how different factors relate to noise output and how noise reduction can be achieved alongside energy saving measures.

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