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EEG-based (electroencephalogram-based) tone synthesizer

A technology of EEG signal and timbre, which is applied in the field of biomedical engineering, can solve problems such as unpleasant sound and achieve the effect of improving user experience

Active Publication Date: 2015-06-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sound it generates is very unpleasant, even closer to clutter

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  • EEG-based (electroencephalogram-based) tone synthesizer
  • EEG-based (electroencephalogram-based) tone synthesizer

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Embodiment Construction

[0024] In the following description, numerous details are provided in order to provide a thorough understanding of the invention. However, it will be appreciated by those skilled in the art that the following description relates only to preferred embodiments of the invention and that the invention may be practiced without one or more of these details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0025] EEG signals are biological potentials collected by electrodes placed on the surface of the human scalp, and the signals are usually very weak. EEG signals can reflect the electrical activity of the brain. EEG signals contain many components. According to different frequencies, EEG signals can be divided into several components such as alpha frequency band (8-15Hz), beta frequency band (16-31Hz), and Gamma frequency band (above 32Hz). According to the different ways of EEG induction, it can b...

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Abstract

The invention provides an EEG-based (electroencephalogram-based) tone synthesizer comprising a stimulator, an EEG acquirer, a processor and a synthesizing device. The stimulator is configured to generate a preset-frequency stimulating signal for a user; the EEG acquirer is configured to acquire an EEG signal generated after the user receives the stimulating signal and subjecting the acquired EEG signal to analog-digital conversion; the processor is configured to acquire fundamental frequency of and harmonic amplitude of steady-state evoked response in the EEG signal subjected to analog-digital conversion, and to calculate a ratio of the fundamental frequency to the harmonic amplitude according to the fundamental frequency and the harmonic amplitude; the synthesizing device is configured to synthesize a tone according to the ratio of the fundamental frequency to the harmonic amplitude. The tone provided by the synthesizer is suitable for playing any sound; if the tone is used to play music, original musicality of a music work is rarely destructed; thus, user experience is evidently improved.

Description

technical field [0001] The invention relates to the field of biomedical engineering, in particular to a timbre synthesis device based on electroencephalogram signals. Background technique [0002] Existing biofeedback systems usually perform the following operations: 1. Measure certain physiological signals, such as ECG, EEG, EMG, etc., and extract features related to certain specific physiological and psychological activities; 2. Combine these features or Their variability is mapped to some kind of visual, auditory or tactile stimulation; 3. After receiving the stimulation, the user usually responds and adjusts his mental and physical state to a certain state. In such systems, physiological signal feature extraction and mapping algorithms are key technologies. [0003] There are mainly the following schemes for converting electroencephalogram (EEG) signals into specific sounds. [0004] Direct audio translation of EEG signals. Specifically, the waveform of the EEG signal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0476
CPCA61B5/316A61B5/38
Inventor 吴超华高小榕王东兵
Owner TSINGHUA UNIV