Essays about: "sound pressure level SPL"

Showing result 1 - 5 of 9 essays containing the words sound pressure level SPL.

1. 1. Automatic Maximum Sound Pressure Level (SPL) Measurements Inside Cars

   University essay from KTH/Teknisk akustik

   Author : Luyao Dong; [2023]
   Keywords : Audio Measurement; Distortions; Maximum Sound Pressure Level SPL ; Automotive Audio; Ljudmätning; distorsion; maximal ljudtrycksnivå; billjud;

   Abstract : With a growing interest in technical specifications among consumers, there is a need for accessible measurement tools that enable individuals to evaluate the performance of their equipment, including common speakers and car audio systems, beyond what the manufacturer provides. However, the existing measurement systems are often geared towards professionals. READ MORE

3. 2. Accuracy verification of GT-Power model and reduction of computational time

   University essay from KTH/Marcus Wallenberg Laboratoriet MWL

   Author : Viktor Dahl; Maja Dyrsmeds; [2022]
   Keywords : Vehicle acoustics; GT-Power; Exhaust system; Internal combustion engine;

   Abstract : The noise produced by any new vehicles is tightly regulated by the European Union which have developed a standardised method for measuring the emitted noise of new vehicles. The method involves a vehicle driving past carefully positioned microphones at a specific range of engine speeds. READ MORE

4. 3. Investigating the Impact of Water Injection on Noise Generation During Rocket Lift-Off

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Sångberg Linus; [2021]
   Keywords : Rocket lift-off; Turbulent mixing noise; CFD;

   Abstract : This thesis aim to provide SSC, Swedish Space Corporation, with a foundation for understanding the key ideas behind water injection during rocket lift-off, including problems to be avoided when simulating the phenomena. This investigation focus on finding approaches suitable for obtaining a rough estimate of the reduction in noise generation, when too expensive equipment required is absent. READ MORE

5. 4. An IoT Solution for Urban Noise Identification in Smart Cities : Noise Measurement and Classification

   University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

   Author : Yasser Alsouda; [2019]
   Keywords : urban noise; sound pressure level SPL ; internet of things IoT ; machine learning; support vector machine SVM ; k-nearest neighbors KNN ; bootstrap aggregating Bagging ; random forest; mel-frequency cepstral coeffi-cients MFCC ;

   Abstract : Noise is defined as any undesired sound. Urban noise and its effect on citizens area significant environmental problem, and the increasing level of noise has become a critical problem in some cities. Fortunately, noise pollution can be mitigated by better planning of urban areas or controlled by administrative regulations. READ MORE

6. 5. Wind-induced transmission of low frequency vibrations for a tall multi-storey wood building

   University essay from Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaper

   Author : Gustav Spjuth; Louise Åkesson; [2016]
   Keywords : acoustic; CLT; FEM; multi-storey; radiation; SPL; vibrations; WIDC.; Technology and Engineering;

   Abstract : The building industry accounts for a large part of the world’s carbon dioxide emissions. At the same time the awareness of sustainable construction and production phase has increased and focus has been directed towards the material wood. READ MORE