Essays about: "Low-Frequency"

Showing result 1 - 5 of 153 essays containing the word Low-Frequency.

  1. 1. Designing a better soundscape for the home office : Devlopment of acoustic furniture

    University essay from Luleå tekniska universitet/Institutionen för ekonomi, teknik, konst och samhälle

    Author : Hanna Mattsson; Theodor Mihel; [2021]
    Keywords : Industrial design engineering; Human centered design; Acoustic design; Furniture design; Product development; Home office; Sound environment; Teknisk design; människocentrerad design; Akustisk design; Möbeldesign; Produktutveckling; Hemmakontor; Ljudmiljö;

    Abstract : As Covid-19 spread throughout the world in the early months of 2020 many people’s lives changed drastically. The situation forced millions of workers and students to start performing their work remotely from home. Currently in Sweden statistics shows that every third person working does it from home at least once a week. READ MORE

  2. 2. Where is Super Terrorism? : A quantitative study of CBRN use by non-state actors

    University essay from Försvarshögskolan

    Author : Andreas Richter; [2021]
    Keywords : Chemical; Biological; Radiological; Nuclear; CBRN; Terrorism; Logistic Regression; Non-state Political Violence.;

    Abstract : Terrorism is academically understood as the quest of non-state actors to cause fear beyond the immediate victims of their action to reach political goals. Means that have an immense psychological impact are therefore expected to be sought after to a high extent by these actors. READ MORE

  3. 3. Simulation of Mechanical Shock with Finite Element Analysis and Estimation of Shock Attenuation

    University essay from KTH/Hållfasthetslära

    Author : Cheng Qian; [2021]
    Keywords : shock; SRS; FEA; attenuation; chock; SRS; FEA; chockdämpning;

    Abstract : Space equipment is often subjected to mechanical shocks. Some devices like electronics are sensitive to shocks, and they can easily be damaged. To protect these devices, it is important to study shock penetrations in space structures. The Finite Element Method is an effective tool to simulate response to transient excitations. READ MORE

  4. 4. Sound Propagation Through Walls

    University essay from Uppsala universitet/Avdelningen för beräkningsvetenskap

    Author : Alexander Berglund; Fredrik Herbai; Jonas Wedén; [2021]
    Keywords : acoustics; wave propagation; infrasound; finite difference methods; SBP-SAT; one dimension; analytical calculation; numerical simulation;

    Abstract : Infrasound is undetectable by the human ear and excessive exposure may be a substantial health risk. Low frequency sound propagates through walls with minimal attenuation, making it difficult to avoid. This study interprets the results from both analytical calculations and simulations of pressure waves propagating through a wall in one dimension. READ MORE

  5. 5. Quantifying Middle Frequency Transient Currents in Power Consuming Devices

    University essay from Uppsala universitet/Institutionen för elektroteknik

    Author : Alex Lundvall; Vincent Sollie; [2021]
    Keywords : ;

    Abstract : The complexity of electrical systems present in vehicles is continuously rising and the number of interconnected electrical devices is growing during the strive for optimization and reaching higher efficiency levels. Actuation of said devices have the possibility of injecting voltage and current harmonics into the system, thus negatively affecting neighbouring devices. READ MORE