Presented herein are techniques for monitoring the physical state of a stimulating assembly to, for example, detect the occurrence of an adverse event. More specifically, an elongate stimulating assembly comprising a plurality of longitudinally spaced contacts is at least partially implanted into a recipient. Electrical measurements are performed at one or more of the plurality of contacts and the electrical measurements are evaluated relative to one another to determine the physical state of the stimulating assembly.

Event detection in an implantable auditory prosthesis

The invention discloses mobile equipment, an extracorporeal machine, an artificial cochlea system and a speech processing method. The artificial cochlea system comprises the mobile equipment, the extracorporeal machine and an implant. When the mobile equipment is in the hearing mode, speech signals are collected and stored, the mobile equipment converts the speech signals into text information and displays the text information, and meanwhile the speech signals are converted into digital signals to be sent to the extracorporeal machine. The extracorporeal machine sends the digital signals to the implant; the implant converts the digital signals to corresponding electric signals and sends the electric signals to an electrode inside a cochlea; the speech collection and word processing functions are integrated to the mobile equipment, and the speech signal processing capacity is greatly improved; a microphone and a speech processor inside an existing extracorporeal machine are omitted, and the size of the extracorporeal machine is greatly reduced; the text display function is added, a user can conveniently check texts and can do exercise of himself except regular rehabilitation training so as to meet the various complex environment using requirement, and the better using effect is achieved.

Mobile equipment, extracorporeal machine, artificial cochlea system and speech processing method

The invention discloses a multichannel synchronous cochlea auditory nerve action potential measuring system and a multichannel synchronous cochlea auditory nerve action potential measuring method. The multichannel synchronous cochlea auditory nerve action potential measuring system comprises a flexible multichannel electrode array, a pre-amplification unit, a multichannel A/D (analog/digital) conversion unit, a signal processing controller, a data caching and transmitting unit, an upper machine and a display unit, wherein the flexible multichannel electrode array is used for acquiring local auditory nerve action potential signals; the pre-amplification unit is connected with outgoing lines of the multichannel electrode array and amplifies weak auditory nerve potential signals acquired by electrodes respectively and independently; the multichannel A/D conversion unit is used for converting multichannel electric signals outputted from the pre-amplification unit into corresponding digital signals; the signal processing controller is respectively connected with the various units and is used for transmitting corresponding control signals to the various units and reading configuration commands, which are downloaded from the upper computer, in a memory; the data caching and transmitting unit is used for locally storing various acquired channels of parallel data or directly transmitting the parallel data to the upper computer which is used for processing the parallel data; and by the upper computer and the display unit, various measurement parameters are set, the acquired data are processed, and auditory nerve synchronous potential waveforms of a selected observation channel are displayed correspondingly.

Multichannel synchronous cochlea auditory nerve action potential measuring system and multichannel synchronous cochlea auditory nerve action potential measuring method

The invention relates to an electrode array manufacturing method. The method includes the following steps of stamping platinum sheets to form platinum electrode wafers, sizing platinum-iridium alloy wires through a wire winding machine to form platinum-iridium electrode lead wires, welding one end of each platinum-iridium electrode lead wire to the center of the corresponding platinum electrode wafer through the electric resistance welding technology to form an electrode, plating the surfaces of the electrodes with insulating layers through the vacuum coating technology to form electrodes with the insulating surfaces, sequentially loading the multiple electrodes with the insulating surfaces onto an electrode array die with silica-gel carriers, conducting thermal processing on the electrode array die to form a solidified blank piece of an electrode array, and trimming the blank piece to form the electrode array. The electrodes are made of safe and stable materials, and therefore biological safety of the electrode array is improved; the vacuum coating technology is adopted, and therefore interference of electric fields between every two adjacent electrodes is reduced, and effectiveness of stimulation is improved.

Electrode array manufacturing method

The invention discloses an artificial cochlea acoustic nerve conductive electrode array capable of sensing music melodies According to the base frequency of music notes, at the frequency sensing position of a human ear basilar membrane, the area between the top of a cochlea and the bottom of the cochlea is divided into frequency areas with specific stimulation signals according to a frequency band corresponding to a note with a half pitch; a specific electrode for conducting signals of the frequency band is arranged in each audio frequency area, namely the electrode is arranged at the frequency band corresponding to a possible base frequency and harmonic frequency of the music notes The number of the electrodes is 80, and the electrodes correspond to the music audio frequency range of 60-6000 Hz The artificial cochlea electrodes are distributed according to the scheme, harmonic features of music notes of various musical instruments within the range of 60-6000 Hz can be accurately transmitted in a relative complete mode, and subharmonic elements of each note can be accurately expressed; meanwhile, according to the electrode distribution scheme, the electrodes are distributed more densely than existing electrodes capable of sensing voice information, and voice feature information can still be transmitted accurately

Artificial cochlea acoustic nerve conductive electrode array capable of sensing music melodies

The invention provides a method and a system for testing ECAP (equal-channel angular pressing) signals in a cochlea. The system comprises an electrode array, an internal testing signal receiving and controlling device, a first processor and a second processor, wherein the electrode array and the internal testing signal receiving and controlling device are arranged in the body of a user; the first processor and the second processor are positioned out of the body of the user; the first processor provides coding electrical stimulation signals for the internal testing signal receiving and controlling device, and is also used for providing stimulation current for a certain electrode or several electrodes in the electrode array; measurement operation is carried out by setting the first processor or the measuring electrodes; the internal testing signal receiving and controlling device stimulates the electrodes in the electrode array through a switch array, and electrode impedance, electrode potential and ECAP signal measurement are carried out; and useful compound control action potential signals are recovered and extracted through the second processor by using a polarity alternating method. The animal testing electrodes are easy to implant and can effectively stimulate auditory nerves; and by using a DSP (digital signal processor) chip and a singlechip MPU (microprocessor unit), the external processors and the internal implanted system are low in cost and effective.

Method and system for testing ECAP (equal-channel angular pressing) signals in cochlea

The invention relates to an artificial cochlea device which comprises an in-vitro circuit, an in-vivo circuit and an electrode array. The in-vivo circuit comprises a radio frequency receiving module, a data recovery module, a core control module, a current source and a multiway switch. The radio frequency receiving module is used for receiving voice data information sent by the in-vitro circuit, the data recovery module is used for obtaining stimulating electrode data and stimulating current data from the voice data information, the core control module is used for receiving the stimulating current data and transmitting the stimulating current data to the current source, the current source is used for converting the stimulating current data into stimulating currents and transmitting the stimulating currents to the multiway switch, and the multiway switch is used for receiving the stimulating currents sent by the current source. According to the device, the ultra-low power consumption in-vivo circuit is designed, the efficient stimulating currents are provided, and the weak electrically-evoked compound action potential can be accurately captured.

Artificial cochlea device

The invention relates to a small-signal amplification system. The small-signal amplification system comprises an input stage circuit, an automatic-zero-setting circuit, an intermediate stage circuit and an output stage circuit, wherein the input stage circuit, the intermediate stage circuit and the output stage circuit are provided an input stage combination switch circuit, an intermediate stage combination switch circuit and an output stage combination switch circuit respectively; multiple magnification time is achieved through the closing action combination of the three stage combination switch circuits, magnification on small bio-electricity signals with different magnitudes is conducted, and the bio-electricity signals are in a m V stage or in an u V stage. According to the small-signal amplification system, the multiple magnification time is achieved through the mode of arranging a combination switch circuit in each stage of operational amplifier in multi stages of operational amplifier, and magnification measuring can be conducted on the bio-electricity signals in the m V stage or in the u V stage with different magnitudes.

Small-signal amplification system

The utility model relates an external voice processor in an artificial cochlea. The external voice processor comprises a microphone, a voice signal preprocessing module, an A/D conversion module, a voice signal processing module, a radio frequency emitting/receiving module and a power module. The external voice processor further comprises a communication interface module and an external storage device, the voice signal processing module is connected with the communication interface module and the external storage device, and the microphone is sequentially connected with the voice signal preprocessing module, the A/D conversion module, the voice signal processing module and the radio frequency emitting/receiving module. Because the voice signal processing module is connected with the communication interface module, the voice signal processing module can have communication with a PC through the communication interface module; meanwhile, stimulus parameter regulation and external programming are performed on the voice signal processing module through the PC, an improved new language processing strategy can be applied, and an artificial cochlea system can be updated flexibly.

External voice processor in artificial cochlea

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Method and system for testing ECAP (equal-channel angular pressing) signals in cochlea

Artificial cochlea device

Small-signal amplification system

External voice processor in artificial cochlea