Sökning: "noise barrier"
Visar resultat 1 - 5 av 32 avhandlingar innehållade orden noise barrier.
1. Prediction and Optimisation of Traffic Noise. A Study on Noise Barriers and Shielded Areas
Sammanfattning : The main contribution of noise levels in cities is today road traffic. The strongest source for all road vehicles is most often the tyre-road contact. This source position close to the ground is fortunate with respect to secondary noise abatement measures, such as absorbing road surfaces or noise barriers. LÄS MER
2. The Influence of Atmospheric Turbulence on Barrier Sound Reduction
Sammanfattning : Numerical modelling and measurements are used for studying the reduced performance of a noise barrier, caused by a turbulent atmosphere. The turbulence scatters the sound, which leads to an increased noise level in the acoustic shadow region behind the barrier. LÄS MER
3. Noise Properties of the Single Electron Transistor
Sammanfattning : The Single Electron Transistor (SET) is a sensitive electrometer with a charge sensitivityultimately limited by noise. In this thesis we present measurements of noiseproperties and charge sensitivity of the radio-frequency Single Electron Transistor. LÄS MER
4. Multi-Gigabaud Millimeter-Wave Communication - Challenges and Solutions
Sammanfattning : A major challenge in future mobile networks is to overcome the capacity barrier in wireless communication. Utilizing large bandwidth at higher frequencies is key to enabling capacity upgrade for next generation mobile networks (5G). LÄS MER
5. Design and Fabrication of InP High Electron Mobility Transistors for Cryogenic Low-Noise Amplifiers
Sammanfattning : High electron mobility transistor (InP HEMT) cryogenic low noise amplifiers (LNAs) have made significant improvements in noise and gain following decades of development. Applications are found from radio astronomy to quantum computing. LÄS MER