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Alternative Method For Low Frequency Impact Sound Measurement For Building Field Tests, Sunit Girdhar
Alternative Method For Low Frequency Impact Sound Measurement For Building Field Tests, Sunit Girdhar
Dissertations, Master's Theses and Master's Reports
What do high heels, dog nails, and dragging furniture have in common? They are all frequent sources of noise pollution and annoyance in multi-story buildings. Building codes exist to control and mitigate such noise, but these codes are outdated and fail to protect the residents against noise annoyance. Footstep noise is still the number one cause of complaints among the residents. The impact performance of floor-ceiling assemblies is characterized using a single-number rating called the Impact Sound Rating (ISR). A standard tapping machine is used in pre-defined locations on the floor and the radiated Sound Pressure Level (SPL) is measured …
Improved Low-Frequency Impact Insulation Class Measurements Based On Comparison Techniques, Sunit Girdhar
Improved Low-Frequency Impact Insulation Class Measurements Based On Comparison Techniques, Sunit Girdhar
Dissertations, Master's Theses and Master's Reports
In today’s world, noise pollution is growing as a major concern and it is becoming more and more difficult to find quiet places. But when the problem escalates to the extent that people are annoyed with loud noises even in their apartments, it becomes an alarming issue for engineers. Around the world, cities have defined some basic performance requirements for buildings, and isolation of residents from noise is one of the cardinal performance requirements. In the United States, building codes use the Impact Insulation Class (IIC) rating to characterize the performance of floor/ceiling assemblies. This method uses the response measured …
Understanding Chassis Inputs From The Rear Suspension Of A Snowmobile, Jamie L. Kleinendorst
Understanding Chassis Inputs From The Rear Suspension Of A Snowmobile, Jamie L. Kleinendorst
Dissertations, Master's Theses and Master's Reports - Open
Today’s snowmobile industry faces great challenges in the field of noise & vibration. The area of main concern is the pass-by noise restriction defined by the Society of Automotive Engineers (SAE) test standard J192, with a maximum sound pressure level of 78 dB(A) being required by many states and national parks. To continue meet or beat this requirement without effecting machine performance, a deeper understanding of the sound transfer paths is required. This thesis examines the transfer paths created by the tunnel, rear suspension, drive shaft, and rubber composite track, with the primary source being suspension input through the ground. …