Sökning: "anechoic chamber"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden anechoic chamber.

  1. 1. A comparison of binaural recordings performed in six different room configurations

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Denice Perkhed; [2021]
    Nyckelord :Binaural recordings; absorbtion coefficient; reverberation time; anechoic chamber; listening test; Psychoacoustics; Technology and Engineering;

    Sammanfattning : Children in Swedish preschools are exposed to high noise levels that can cause hearing damage or voice related problems among both teachers and students, this since they have to raise their voice in order to make themselves heard in a noisy environment. Because of this it is of interest to be able to predict the sound environment in preschools. LÄS MER

  2. 2. Electrically Steerable Phased-Arrays for 5G Sub-6 GHzMassive MIMO Active Antenna Units : Re-configurable Feed Networks

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för elektroteknik

    Författare :Johan Kövamees; [2020]
    Nyckelord :Electrically Steerable Phased-Arrays for 5G Sub-6 GHz Massive MIMO Active Antenna Units;

    Sammanfattning : During this project we have designed a new type of antenna that uses an array of antenna elements in order to emit electromagnetic radiation as signals and to be able to control the beam. After an extended time the design yielded a simulation which had the correct characteristics. LÄS MER

  3. 3. Reliability of discerning humans using microwave polarisation and diffraction phenomena

    Master-uppsats, Mälardalens högskola/Akademin för innovation, design och teknik

    Författare :Susanne Lindgren; [2020]
    Nyckelord :;

    Sammanfattning : Presented here is an examination of the feasibility to utilise basic microwave phenomena for reliable human discernment. Being able to distinguishing a person from other objects is essential around society. For example, near railway tracks where lives could be saved if a system could alert the driver. LÄS MER

  4. 4. A Novel and an Efficient Design of an Inverted F-Antenna for Bluetooth Low Energy Communications

    Magister-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Amer Khatib; [2019]
    Nyckelord :Antenna; Communication; design; testing; Wireless communications; bluetooth.;

    Sammanfattning : Constantly, antenna plays an important role in expanding the wireless communication systems in different technology applications for example, but not limited to, IoT communications and automotive radar systems. On the other hand, the Bluetooth-Low-Energy (BLE) benefits different sorts of applications, as it offers (i) a very low power consumption, (ii) a very fast data transfer, (iii) and an inexpensive/efficient solution as well. LÄS MER

  5. 5. Doppler Wheel for Emulation of Automotive Radar Target

    Magister-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Mohammed ALRimawi; [2019]
    Nyckelord :Radar; Doppler; emulator; speed controller; microcontroller; automotive; demonstration; signal processing; testing;

    Sammanfattning : Automotive radar is an emerging field of research and development. Technological ‎advancements in this field will improve safety for vehicles, pedestrians, and ‎bicyclists, and enable the development of autonomous vehicles. Usage of the ‎Automotive radar is expanding ‎in car and road areas to reduce collisions and ‎accident. LÄS MER