Browsing by Subject "efekt audio"

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Access status: Open Access ,
Budowa analogowego efektu audio sterowanego biosygnałami
(Wydawnictwa AGH, 2024) Węgrzyn, Filip
The paper presents a description of the construction of an analog audio effect using biosignals recorded from the human scalp to modulate sound. The biosignals included electroencephalographic waves narrowed to the Alpha brainwave band, as well as electrooculographic waves within the same band. A phaser effect was chosen, which modifies input signals based on changing the center frequency of notch filters. The device was designed to operate in two modes. In the first mode, EEG (electroencephalographic) and EOG (electrooculographic) waves were directly used to control the filters affecting the sound. In the second mode, modulation was carried out using a triangular signal obtained from a voltage-controlled oscillator, to which the envelope of the recorded waves was applied. The effect was tested during an electroencephalograph examination, and the degree of user control over its parameters was determined through the analysis of the obtained spectrograms.