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Our finding of a high prevalence of NIHL in certain industries will trigger immediate actions to control noise hazard, which in turn will provide better protection for noise-exposed workers.
Proceedings ArticleDOI
08 May 2006
10 Citations
Installation of a hot-stream liner should yield a considerable noise reduction, which would also reduce the take-off noise.
Proceedings ArticleDOI
Yin Wu, Wei Zhao, Qin Zhang 
14 Dec 2013
5 Citations
Simulation results show that the improved adaptive noise cancellation system do have better noise reduction and practical value.
Thus, the study showed a real need to use real-time noise reduction methods instead of off-line noise reduction methods that had previously been used.
It will be shown that DSM trades off nonstationary noise robustness for performance improvements.
The double panel exhibits better noise reduction than the other panels do.
MFCCs, however, do not help for the high noise settings.
This paper shows how this noise can be filtered in an efficient way.

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Is grounding mat apporved by real science research?
5 answers
Grounding mats have been extensively studied and approved by real science research. Research has focused on various aspects such as fault diagnosis equations using electric network theory, simulated grounding test systems for grounding materials, and the importance of grounding grids in power system maintenance. Additionally, innovative designs like electrically-conductive covers for grounding mats have been developed and tested. Furthermore, ground mat devices with heating elements have been invented to enhance user comfort and tidiness. These studies collectively demonstrate the scientific validity and practical applications of grounding mats, showcasing their approval and acceptance in the realm of scientific research.
What are the emissions from tire usage on vehicles and effects from heavier vehicles.?
4 answers
Tire emissions from vehicles, particularly heavier ones, are a significant concern due to their contribution to particulate matter (PM) in urban areas. Research shows that heavier vehicles produce higher concentrations of PM2.5 and PM10 from tire wear compared to lighter vehicles, with peaks reaching up to 4750 μg/m3 for PM2.5 and 8290 μg/m3 for PM10. Additionally, the design of heavy vehicle tires plays a crucial role in noise emissions, with differences in tire noise becoming a prominent factor in overall vehicle noise levels. The structure of heavy vehicle tires, including the arrangement of working layers and reinforcing elements, influences both emissions and noise levels, highlighting the importance of tire design in mitigating environmental impacts.
How can technological interventions help to curb agriculture crime?
10 answers
Technological interventions offer a multifaceted approach to curbing agricultural crime, addressing both prevention and detection. The Agricultural Crime, Technology, Information, and Operations Network (ACTION) initiative demonstrates that increasing guardianship measures, such as marking equipment and livestock and using surveillance equipment, can significantly reduce victimization by making it harder for offenders to commit crimes unnoticed. Similarly, the deployment of subsidized watchmen in Kenya shows that improved farm protection can lead to increased agricultural productivity and reduced theft, highlighting the role of security in enhancing farm operations. Innovative devices, such as the agricultural anti-theft device equipped with solar panels, infrared sensors, and alarm systems, offer environmentally friendly solutions that alert farmers to unauthorized entries, thereby preventing theft. Moreover, the use of communication-based crime prevention methods, which utilize wireless signals to detect trespassing, can significantly reduce installation and operational costs while providing precise location data for effective management. The importance of technological intervention is further underscored by its socio-economic benefits, as seen in Nepal, where modern technologies have fostered commercial farming, increased family income, and supported rural development. Police forces in rural England and Wales also recognize the efficacy of technological methods like CCTV in farm crime prevention, despite concerns about limited resources. Electronic forensics in the agricultural sector can enhance security by providing a fast and flexible method for evidence extraction, crucial for regulatory processes and cracking down on high-tech crimes. Empowering farm women through technology has shown significant improvements in their participation in farming activities, decision-making, and self-confidence, indicating the broader social benefits of technological interventions. Lastly, IoT-based smart farms, utilizing image monitoring systems like CCTV, can detect and alert users to potential theft, showcasing the potential of technology to manage and control agricultural operations remotely. Together, these technological interventions not only enhance the security and productivity of the agricultural sector but also contribute to the socio-economic development of rural communities, demonstrating a comprehensive approach to combating agricultural crime.
Why traffic density affect the surrounding housing price?
5 answers
Traffic density affects surrounding housing prices due to the negative impact of traffic nuisances on property values. Studies show that increased traffic intensity leads to a substantial decrease in housing prices, with a doubling of traffic density resulting in a 2% reduction in property values. Additionally, the presence of traffic noise, which tends to increase disproportionately to the noise produced, has a significant negative relationship with housing values, leading to an average devaluation of 1,900 ITL per percentage point of people disturbed by noise per square meter of surface area. Urban projects like highways can also influence housing prices, with areas closer to highways experiencing less growth in land and housing prices compared to areas further away from the project site.
What are the negative impact of Drones in terms of Noise Pollution for Consumers?
4 answers
Drones can have significant negative impacts on consumers in terms of noise pollution. Studies show that as drone fleets increase in size, noise levels rise rapidly, creating hotspots that extend beyond warehouses and charging stations, leading to annoyance and interference with human activities. The noise generated by drones, especially at low altitudes near densely populated areas, can affect human health and well-being, potentially causing hearing impairment, hypertension, heart disease, and sleep disturbance. Research also indicates that high-frequency and tonal noise from drones can be particularly annoying to individuals, highlighting the importance of designing drones for calmness to mitigate these negative impacts on consumers. Therefore, addressing the noise pollution caused by drones is crucial to safeguarding consumer well-being and quality of life.
What are the negative impact of Drones in terms of Noise Pollution for Emergency services?
4 answers
Unmanned aerial vehicles (UAVs) utilized in emergency services can have negative impacts in terms of noise pollution. Studies have shown that as UAVs operate at low altitudes, their noise impact on human health becomes more pronounced, especially with the development of advanced technologies. Noise measurements of different UAVs revealed that parameters for hexarotors were higher than quadrotors, with participants distinguishing between the noise of UAVs and having a more negative experience with hexarotors. Despite the noise perception, over 80% of respondents believed that the pros of UAV integration into everyday life outweigh the cons. Therefore, while UAVs offer significant benefits in emergency response, their noise pollution can pose challenges that need to be addressed for effective and sustainable deployment.
What are the negative impact of Supersonic Jets in terms of Training for Ground staff?
5 answers
Supersonic jets can have negative impacts on ground staff training due to the high noise levels they produce. The intense noise generated by supersonic jet engines, especially during take-off and landing, can lead to severe hearing damage for ground personnel. Additionally, the screech tones produced by these jets can reach sound pressure levels of up to 160 dB, causing immense noise pollution and potential structural fatigue. Therefore, training programs for ground staff working in close proximity to supersonic jets need to address the risks associated with exposure to high noise levels and implement measures to protect the hearing and overall well-being of the personnel.
What are the negative impact of Supersonic Jets in terms of Safety Concerns for Ground staff?
5 answers
Supersonic jets pose safety concerns for ground staff due to high noise levels and potential structural damage. The noise generated by supersonic jet operations can lead to severe hearing damage for personnel working near the aircraft. Additionally, the interaction between the jet exhaust shock structure and fluidic injection methods affects the total noise radiation, impacting the health and safety of ground staff. Furthermore, when supersonic jets interact with obstacles or the ground, the behavior of the jet can change significantly, influencing factors like flammability limits and cloud extent of substances released, which are crucial in safety assessments. These factors highlight the importance of considering the proximity of supersonic jets to the ground and implementing appropriate safety measures to protect ground staff from potential hazards.
What are the negative impact of Supersonic Jets in terms of Infrastructure for Cargo companies?
5 answers
Supersonic jets, due to their complex shock patterns and imperfect expansion, can lead to immense noise pollution and structural fatigue, impacting infrastructure for cargo companies. The shocks interacting with turbulent mixing layers can generate screech tones reaching sound pressure levels of up to 160 dB, causing significant noise issues. Additionally, sonic booms from supersonic transports can reach the ground after refraction, resulting in low-frequency "rumbles" that may affect infrastructure due to their attenuation and dispersion effects. These environmental impacts, combined with the emissions primarily in the stratosphere, can pose challenges for cargo companies operating in areas affected by supersonic aircraft operations.
What are the negative impact of Supersonic Jets in terms of for Suppliers of aircraft parts?
4 answers
Supersonic jets, due to their unique shock patterns and noise characteristics, pose challenges for suppliers of aircraft parts. The complex shock-cell structures in supersonic jets lead to the generation of broadband shock-associated noise (BBSAN) and screech tones, reaching sound pressure levels of up to 160 dB, causing immense noise pollution and structural fatigue. Additionally, supersonic impinging jets result in high-pressure and acoustic loads on nearby structures, leading to lift loss, ground erosion, and hot gas ingestion issues. These adverse effects necessitate specialized components to withstand the high unsteady loads and noise levels associated with supersonic aircraft, impacting suppliers in terms of design complexity, material requirements, and performance standards.
What are the negative impact of Supersonic Jets in terms of Increased Competition for Suppliers of aircraft parts?
4 answers
Supersonic jets, due to their unique characteristics, can pose challenges in terms of increased competition for suppliers of aircraft parts. The design and operation of supersonic aircraft involve addressing issues such as supersonic jet noise reduction, complex shock patterns leading to noise pollution and structural fatigue, and the presence of screech tones with sound pressure levels exceeding 160 dB. These factors necessitate specialized components and technologies, potentially creating a higher demand for specific parts and systems. The development and maintenance of supersonic jets may require suppliers to meet stringent requirements for noise reduction, shock pattern mitigation, and structural integrity, leading to a competitive environment among suppliers to provide these specialized components efficiently and effectively.