4 research outputs found
Study of Low Frequency Impact Sound Transmission For Auralization
No full textFootfall induced noise in buildings is traditionally assessed with Impact Sound Transmission (IST) measurements following diffuse field model of the receiving room which is not valid below Schroeder frequency neither it facilitates auralization. This master thesis aims to create a method to estimate low frequency (LF) sound pressure in the receiving room below Schroeder frequency based on modal sum theory in room acoustics followed by measurement of IST, impulse response of the receiving room and acceleration of the main floor at two fixed position in two vertically adjacent laboratories. The study also aims to create monoaural auralization of the sound pressure with a hypothesis that the impulse response of the combined system of floor and receiving room can be used to synthesize the acoustic sound pressure at listening positions in the receiving room.
The method to create the LF sound pressure in the receiving room was found to be working to some degree with the main floor showing comparatively higher modal density. More accurate results can be achieved by measuring acceleration of the floor at multiple points. Similarly, the auralization method worked between 20-200Hz with some errors and more accurate results can be accomplished by measuring force signals at higher sampling rate and a more precise calculation of impulse response of the coupled system
Study of Low Frequency Impact Sound Transmission For Auralization
No full textFootfall induced noise in buildings is traditionally assessed with Impact Sound Transmission (IST) measurements following diffuse field model of the receiving room which is not valid below Schroeder frequency neither it facilitates auralization. This master thesis aims to create a method to estimate low frequency (LF) sound pressure in the receiving room below Schroeder frequency based on modal sum theory in room acoustics followed by measurement of IST, impulse response of the receiving room and acceleration of the main floor at two fixed position in two vertically adjacent laboratories. The study also aims to create monoaural auralization of the sound pressure with a hypothesis that the impulse response of the combined system of floor and receiving room can be used to synthesize the acoustic sound pressure at listening positions in the receiving room.
The method to create the LF sound pressure in the receiving room was found to be working to some degree with the main floor showing comparatively higher modal density. More accurate results can be achieved by measuring acceleration of the floor at multiple points. Similarly, the auralization method worked between 20-200Hz with some errors and more accurate results can be accomplished by measuring force signals at higher sampling rate and a more precise calculation of impulse response of the coupled system
Trade linked global aluminium cycle - An overview of supply chain and expansion of model to differentiate beverage can cycle
No full textSince the advent of industrialization, humans have been exploiting natural resources more than ever. Extracting oil, wood, minerals, ores and other materials from lithosphere, there has been a massive change in peoples lifestyle and landscape around the world since then. With technological advancement, global population has also been increasing which is further adding pressure to the use of the resources. United Nations Environmental Programme (UNEP, 2011) states that 20th century brought a remarkable progress for the human civilization. It highlights that annual extraction of construction materials grew by a factor of 34, ores and minerals by factor of 27, fossil fuels by a factor of 12, biomass by a factor of 3.6 and total material extraction by a factor of about 8 while GDP grew 23-fol
A Visualization Dashboard for Muslim Social Movements
No full textabstract: Muslim radicalism is recognized as one of the greatest security threats for the United States and the rest of the world. Use of force to eliminate specific radical entities is ineffective in containing radicalism as a whole. There is a need to understand the origin, ideologies and behavior of Radical and Counter-Radical organizations and how they shape up over a period of time. Recognizing and supporting counter-radical organizations is one of the most important steps towards impeding radical organizations. A lot of research has already been done to categorize and recognize organizations, to understand their behavior, their interactions with other organizations, their target demographics and the area of influence. We have a huge amount of information which is a result of the research done over these topics. This thesis provides a powerful and interactive way to navigate through all this information, using a Visualization Dashboard. The dashboard makes it easier for Social Scientists, Policy Analysts, Military and other personnel to visualize an organization's propensity towards violence and radicalism. It also tracks the peaking religious, political and socio-economic markers, their target demographics and locations. A powerful search interface with parametric search helps in narrowing down to specific scenarios and view the corresponding information related to the organizations. This tool helps to identify moderate Counter-Radical organizations and also has the potential of predicting the orientation of various organizations based on the current information.Dissertation/ThesisM.S. Computer Science 201
