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    Wyświetlanie 1-3 z 3
    Tytuł:
    The design of digital audio filter system used in tomatis method stimulation
    Autorzy:
    Jóźwiak, Krzysztof
    Bujacz, Michał
    Królak, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/384341.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    sound filtering
    digital signal processing
    shelving filter
    FIR filter
    Electronic Ear stimulator
    Tomatis Method
    filtrowanie dźwięku
    przetwarzanie sygnału cyfrowego
    filtr FIR
    metoda Tomatisa
    Opis:
    The Tomatis Method is a rehabilitation technique used in psychology, the main aim of which is stimulating the cochlea in the inner ear by filtered air-conducted and bone-conducted sounds. The system of electronic filters and amplifiers used for this therapy is called the Electronic Ear. Commonly, it is a commercial analog device that is expensive and after a few years its functionality declines. In this paper, we propose a digital Electronic Ear system using an STM32F4 family micro-controller and ADC/ DAC integrated circuits. The design of the digital sound filters allows to adjust more parameters and overcomes some of the constraints of analog systems. In this paper, we provide a short review of the Tomatis Method, the main functions of the Electronic Ear and we describe the designed system with comparison measurements to the analog original.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2019, 13, 1; 73-78
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of echolocation abilities of blind and normally sighted humans using different source sounds
    Autorzy:
    Bujacz, Michał
    Skulimowski, Piotr
    Królak, Aleksandra
    Sztyler, Bartłomiej
    Strumiłło, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/2202429.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    echolocation
    blindness
    visual impairment
    echolokacja
    ślepota
    niepełnosprawność wzrokowa
    Opis:
    The ability of some humans to echolocate has become widely known primarily due to a small number of famous expert echolocators who are capable of extraordinary feats. However, a lesser-known fact is that all humans exhibit this skill unconsciously and can learn it relatively quickly and implicitly through repeated practice. In our experiments we tested groups of 12 blind and 14 sighted untrained participants in a simple echolocation test - localizing a 1m x 2m vertical wall at distances between 1 and 3 meters using 10 different types of sounds as the source signals for the echolocation attempts. There were significant differences between the participant groups and between some of the tested sounds. Although the groups were small, a clear difference was also observed between the experienced totally blind participants and the legally blind visually impaired participants that had residual light sensitivity. From the compared sounds 3 kHz and 4 kHz synthetic percussion sounds, pink and blue noise were among the sources that led to the highest chances of correctly guessing the obstacle’s direction and distance.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022213
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of Methodologies in Recent Research of Human Echolocation
    Autorzy:
    Bujacz, Michał
    Sztyler, Bartłomiej
    Wileńska, Natalia
    Czajkowska, Karolina
    Strumiłło, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/31339850.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    echolocation
    blindness
    testing methodology
    Opis:
    The presented review discusses recent research on human echolocation by blind and sighted subjects, aiming to classify and evaluate the methodologies most commonly used when testing active echolocation methods. Most of the reviewed studies compared small groups of both blind and sighted volunteers, although one in four studies used sighted testers only. The most common trial procedure was for volunteers to detect or localize static obstacles, e.g., discs, boards, or walls at distances ranging from a few centimeters to several meters. Other tasks also included comparing or categorizing objects. Few studies utilized walking in real or virtual environments. Most trials were conducted in natural acoustic conditions, as subjects are marginally less likely to correctly echolocate in anechoic or acoustically dampened rooms. Aside from live echolocation tests, other methodologies included the use of binaural recordings, artificial echoes or rendered virtual audio. The sounds most frequently used in the tests were natural sounds such as the palatal mouth click and finger snapping. Several studies have focused on the use of artificially generated sounds, such as noise or synthetic clicks. A promising conclusion from all the reviewed studies is that both blind and sighted persons can efficiently learn echolocation.
    Źródło:
    Archives of Acoustics; 2023, 48, 3; 249-271
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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