Sökning: "sound weighting"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden sound weighting.
1. Active Control of Propeller-Induced Noise in Aircraft : Algorithms & Methods
Sammanfattning : In the last decade acoustic noise has become more and more regarded as a problem. In cars, boats, trains and aircraft, low-frequency noise reduces comfort. Lightweight materials and more powerful engines are used in high-speed vehicles, resulting in a general increase in interior noise levels. LÄS MER
2. Critical noise factors and their relation to annoyance in working environments
Sammanfattning : Noise is one of the most widespread problems in working environments. Besides the obvious risk of hearing damage and masking of warning signals and speech, the effects on concentration, performance, behaviour and general well-being are serious consequences of annoying noise in the working environment. LÄS MER
3. Weighted Regression with Application to Array Antennas
Sammanfattning : A nonlinear system can be modelled with a simple linear model ifthe model is only valid locally. This can be done by assigningweights to the estimation data, as a function of the distance tothe modelled point. The weighting is here used to develop adirection-dependent calibration method for array antennas. LÄS MER
4. On the impact of noise and energy demand from traffic : An assessment using microscopic modelling
Sammanfattning : Noise emissions from transportation remain one of the greatest environmental issues of modern day. Inhabitants in urban environments are especially exposed, with almost 80 million people in the European Union exposed to noise levels exceeding the recommended limits set by the World Health Organization (WHO). LÄS MER
5. Värdering och säkring av innemiljökvaliteter i byggnader: i program-, projekterings- och förvaltningsskede
Sammanfattning : This thesis presents and evaluate a methodology to assess and ensure Indoor Environment Qualities (IEQ) in buildings, during program, design and management phases. Different tools are proposed to collect input for assessment and to structure decision making in planning process. LÄS MER