Array fiber opto-acoustic bionic ear device and signal conversion method

Abstract

The invention particularly discloses an array fiber opto-acoustic bionic ear device and a signal conversion method. The device comprises a sound signal processor, an array data controller, laser modulation drivers, a laser fiber array and fiber collimators, wherein the laser modulation drivers are in charge of converting multiple signals output by the sound signal processor into corresponding optical signals; the sound signal processor is connected with the array data controller; the array data controller respectively controls all electrical signals to be connected with the corresponding laser modulation drivers; the laser modulation drivers are connected with the fiber array; the fiber array is connected with the corresponding fiber collimators; finally, each optical signal is output to irradiate corresponding positions of the auditory nerves of living bodies. Optical signal outputs of all ports of the laser fiber array respectively correspond to audio ranges divided by the logarithmic scale, that is, each fiber signal output corresponds to one corresponding audio range signal.

Description

[0001] technical field [0002] The invention relates to the application field of optical fiber sensing and photoelectric technology, in particular to an array optical fiber photoacoustic bionic ear device and a signal conversion method. Background technique [0003] The sensory sound of the inner ear of the auditory system has the characteristics that the topological structure of the cochlea and the sound frequency components correspond to each other, and a large number of auditory cells (also known as hair cells) are distributed in the corresponding positions, and their functions are similar to the "sensors" for sensing audio components. It is these hair cells and the auditory nerve at the back end that are connected to each other to complete the transmission of sound information to the functional areas of the brain. The existing artificial auditory reconstruction device - Cochlear Implant (Cochlear Implant, often referred to as CI), is based on the above principles. C...

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Problems solved by technology

Due to the diffusion of the electric field in the electrode current, the synchronous excitation density of the stimulation current in the cochlea space is limited. Either the sound spectrum signals that originally appeared synchronously are released at intervals in time, or only the electrodes that are spaced apart in space can be selected. The spectral signals are released at the same time, so as to reduce the mutual interference of electric fields caused by the simultaneous release of adjacent electrode currents. Therefore, the adjustments made when these electrical signals are excited cause some distortions in the original spectrum array structure of the sound during the stage of stimulating the auditory nerve. For speech signals whose time and spectral structure change slowly, the influence may be limited, and it will not significantly affect the recognition and understanding of the transmitted speech, but for music signals whose spectral structure and temporal relationship change more closely, this distortion It will lead to the confusion of the acoustic information, making it difficult to obtain pleasant sound effects

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