49 results about "Otoacoustic emission" patented technology

A method and device for automatically assessing loss of hearing sensitivity and compression (recruitment) with user defined frequency resolution by means of extrapolated DPOAE I/O functions and ABRs as well as for automatically fitting hearing aids without any cooperation of the subject tested using a device having a display screen attached to a handheld device generating and collecting otoacoustic emission signals and brain stem response signals into a programmed with a clinical audiogram with fitting parameters for hearing aids calculated on the basis of assessed hearing threshold and compression and identifying the type of hearing required for the individual.

A method and device for automatically assessing loss of hearing sensitivity and compression (recruitment) with user defined frequency resolution by means of extrapolated DPOAE I/O functions and ABRs as well as for automatically fitting hearing aids without any cooperation of the subject tested using a device having a display screen attached to a handheld device generating and collecting otoacoustic emission signals and brain stem response signals into a programmed with a clinical audiogram with fitting parameters for hearing aids calculated on the basis of assessed hearing threshold and compression and identifying the type of hearing required for the individual.

The invention relates to a stimulus frequency otoacoustic emission (SFOAE) tuning curve detection and calibration system, which comprises a computer, a sound card, an acoustic sensor and a preamplifier. A sound card driving system and a test calibration execution system are arranged in the computer. An acoustic sensor position calibration module in the test calibration execution system is used for calibrating the position of the acoustic sensor. An SFOAE Fine Structure detection module is used for extracting SFOAEs within a target stimulus frequency range, and determining optimal stimulus frequency. An SFOAE I/O function detection module is used for extracting a relationship between frequency otoacoustic emissions and stimulus sounds within a stimulus intensity range at the optimal stimulus frequency, and determining an inhibition rule. An SFOAE turning curve detection module is used for extracting the SFOAEs in line with the inhibition rule at the optimal stimulus frequency, and drawing an SFOAE tuning curve. The SFOAEs can be quantitatively detected and analyzed by extracting characteristic signals of the SFOAEs; and the system can be widely applied to audibility detection.

The invention discloses a calibrating device of an ear-plugging type energy transducer used for otoacoustic emission hearing detection. The calibrating device comprises an artificial ear, a sound pressure meter, a digital-analog converting device, an analog-digital converting device and a computer. The artificial ear is used for simulating the average acoustic characteristics of normal human ears and comprises an acoustic couple resonator and a standard microphone which is connected with one end of the acoustic couple resonator; the sound pressure meter is connected with the standard microphone of the artificial ear and is used for measuring an electrical signal produced by the standard microphone and converting the electrical signal into a sound pressure value; the digital-analog converting device is used for providing the electrical signal for detecting a loudspeaker of the energy transducer to be detected; the analog-digital converting device is used for collecting the electrical signal output by the microphone of the energy transducer to be detected; and the computer is connected with the digital-analog converting device and the analog-digital converting device. The device can complete the sensitivity calibrating work of the loudspeaker and the microphone in a process, thus being more convenient and quicker; besides, the sensitivity of the sound pressure is measured as to the microphone.

A method to reduce DPOAE fine structure in the measurement of DPOAE acoustic signals generated in the cochlea in response to two primary tones.

Method and system are disclosed for automated testing of a patient's hearing. The automated hearing test allows the patient to quickly and accurately test his own hearing. The patient is instructed and prompted for inputs and responses as needed. The patient and/or operator can select one or several tests to be performed, including air and bone conduction testing with masking, speech reception threshold, speech discrimination, tympanogram, acoustic reflex, and otoacoustic emissions testing. Stenger screening is automatically performed for some patients based on the difference in pure tone frequency air conduction thresholds. Multiple languages are supported. Data obtained from one test may be used for another test or another iteration of the same test to calculate masking levels. The automatic hearing test also detects and compensates for ambient noise in the test results. If a contingency occurs, the automated hearing test is configured to page the operator for assistance.

The invention relates to an auditory sensitivity detection system based on stimulus frequency otoacoustic emission. The detection system comprises an audio card, an acoustic sensor, a computer and a signal feedback device; an input end of a micro loudspeaker is connected with the audio card, an output end of a micro microphone is connected with the audio card, and the signal feedback device is connected with the computer; an auditory sensitivity comprehensive detection system is arranged in the computer, a test execution system comprises an intensity sensitivity detection module based on SFOAEs and a frequency sensitivity detection module based on SFOAEs, and the intensity sensitivity detection module based on SFOAEs is used for determining auditory intensity threshold values correspondingto corresponding frequency points by detecting stimulus frequency otoacoustic emission detection data at all the frequency points; the frequency sensitivity detection module based on SFOAEs is used for extracting a stimulus frequency otoacoustic emission inhibition tuning curve at a designated frequency point and determining the frequency sensitivity at the designated frequency point.

A method of generating and measuring transiently evoked otoacoustic emissions (TEOAE) acoustic signals generated in the cochlea using automated detection to determine contralateral suppression of TEOAE via statistical analysis of suppressed and unsuppressed responses.

A hearing screener apparatus is disclosed and may include a housing and a testing probe operatively coupled to the housing. The testing probe may generate electrical signals based on otoacoustic emissions of the inner ear of a test subject, when the testing probe is inserted into the ear canal of the test subject. The hearing screener apparatus may also include a housing, a digital signal processor (DSP) within the housing, and a testing probe operatively coupled to the housing. The DSP may generate measurement data based on the electrical signals. At least one microphone may be mounted with the testing probe for generating the electrical signals based on the otoacoustic emissions. The testing probe may be vibrationally isolated from the housing. The testing probe may be elastically coupled to the housing. The hearing screener apparatus may also include an isolation body elastically coupled between the testing probe and the housing.

The invention discloses a hearing test device, comprising a headset and a stimulating sound source; the headset is used for receiving stimulating sound wave emitted by the stimulating sound source. The hearing test device also comprises a data processor and an evaluation module connected with the data processor; a speaker and an otoacoustic sensor embedded in the headset, the speaker is connected with the stimulating sound source, the otoacoustic sensor is used for picking an otoacoustic signal generated in the cochlea of a subject and transmitting the otoacoustic signal to the data processor for signal processing, and the evaluating module evaluates hearing condition of the subject and sends out hearing test results. The hearing test device can provide hearing test for the subject when the subject enjoys music or converses; the otoacoustic sensor in the headset may receive the otoacoustic emission signal from the cochlea; the data processor and the evaluation module evaluate hearing of the subject; evaluation is not limited by ambient and stimulating sound source frequency; hearing hest can be performed anytime and anywhere.

A multifunctional comprehensive otoacoustic emission detector comprises a first probe with a microphone and a loudspeaker, a second probe used for playing contralateral acoustic stimulation, a prepositive unit used for filtering and amplifying signals output by the microphone of the first probe, and a computer system for processing the signals processed by the prepositive unit. The computer system comprises an otoacoustic emission signal detection module, an otoacoustic emission signal preprocessing module, an otoacoustic emission signal processing module and a user interaction module, both the detection module and the precessing module comprises a plurality of submodules, the user interaction module comprises a detection and processing control module and a result display module, the detection and processing control module comprises a setting control member of otoacoustic emission types and contralateral stimulation signal types, and the result display module comprises a display control member of time domain waveforms, frequency spectra, noise distribution and the like. The multifunctional comprehensive otoacoustic emission detector can conveniently realize otoacoustic emission detection of different types as well as with/without contralateral acoustic stimulation.

A device and method for the continuous monitoring of otoacoustic emissions (OAE) levels on an individual worker uses as a pair of earpieces each featuring an external microphone, an internal microphone and a pair of miniature receivers. An adaptive filtering noise rejection processing of the measured distortion product OAE (DPOAE) is used to further improve the Signal-to-Noise ratio in frequencies where passive isolation remains insufficient. The adaptive filtering noise rejection technique relies on a Normalized Least-Mean-Square (NLMS) algorithm that uses the ipsilateral external microphone and the contralateral internal microphone to reject the noise from the measured DPOAE signals for each in-ear OAE probe. A DPOAE signal extraction algorithm provides for an increase in results reliability on a greater dynamic range in DPOAE magnitudes than known methods of DPOAE signal extraction. The device and method is suitable for the continuous monitoring of workers' hearing capabilities in industrial noises up to 75 dB(A).

The invention discloses an earphone system self-adaptive to hearing characteristics of a user, which comprises an intelligent audio playing device, a specially-made earphone and human ears, wherein amain control module and a signal output end are arranged in the intelligent audio playing device; the specially-made earphone is provided with a loudspeaker device, a sound collecting device, a signalpreprocessing circuit and a signal transmission module; the loudspeaker device is connected with the signal transmission module; the sound collecting device is connected with the signal transmissionmodule through the signal preprocessing circuit; when the specially-made earphone is worn in a sealing mode and connected with the intelligent audio playing device, the main control module transmits agenerated testing audio signal to the loudspeaker device; the main control module receives and records an otoacoustic emission signal, which is collected by the sound collecting device, is processedby the signal preprocessing circuit and exists in the external auditory canal; and the main control module analyzes the otoacoustic emission signal and adjusts the output characteristic of a music audio signal output by the signal output end through a hardware or software algorithm, so that listening feeling is improved aiming at a hearing curve of the user.

The invention belongs to the technical field of a medical audiological detection system, and particularly relates to an otoacoustic emission simulation and test system. A fixing buckle of an acoustic input port is connected with an interface of an input end of a 2cm<3> coupling cavity to form a cavity, an earphone bracket is fixedly arranged in the cavity, an interface of an output end of the 2cm<3> coupling cavity is in sealed connection with one end of an interface bracket by an O-shaped ring, the other end of the interface bracket is connected with an acoustic receiving and output part of a simulation electrical cochlea, and the acoustic receiving and output part of the simulation electrical cochlea is connected with an electric control part of the simulation electrical cochlea to form the simulation electrical cochlea. The otoacoustic emission simulation and test system has the advantages that the basic functions of the human cochlea can be restored, and the actual otoacoustic emission effect can be simulated; the completeness and the effectiveness of the outputted otoacoustic emission signals can be ensured; and the size of a probe of the simulation electrical cochlea is the same as the size of a standard microphone for measuring, so on the premise of not damaging the characteristics of artificial ears, the direct replacement is realized according to requirements.

The present invention provides transgenic mice deficient in urocortin. Urocortin null mutant mice are hypersensitive to stress and display heightened anxiety-like behaviors in the elevated plus maze and open field tests. These mice also demonstrate physiological alterations in auditory thresholds and distortion product otoacoustic emissions. These results indicate that urocortin plays a modulatory role in anxiety-related behaviors and in contributing to the establishment of auditory thresholds. Such urocortin deficient mutant mice can provide useful models in the study of anxiety pathology and hearing physiology at the biochemical and molecular levels.

A hearing diagnosis device and a hearing diagnosis method are provided. The device includes a storage unit, an otoacoustic emission detecting module, and a hearing diagnosis management module. The storage unit stores a hearing diagnosis image sample database and a hearing information sample database. The otoacoustic emission detecting module is configured to perform an otoacoustic emission detecting operation by playing a test audio to an ear of a user to obtain a first hearing diagnosis image corresponding to the ear. The hearing diagnosis management module is configured to perform a hearing diagnosis operation according to the first hearing diagnosis image, a plurality of hearing diagnosis image samples of the hearing diagnosis image sample database, and a plurality of hearing information samples, respectively corresponding to the hearing diagnosis image samples, of the hearing information sample database, so as to determine first hearing information of the ear.

The invention discloses a signal detecting method. The signal detecting method comprises the following steps that a time domain frequency-modulated signal is obtained and is taken as a stimulation signal to stimulate a reflection region and a distorted region, an otoacoustic emission signal generated by the reflection region is separated from an otoacoustic emission signal generated by the distorted region, and time-frequency domain filtering is conducted on the separated otoacoustic emission signal of the distorted region, so that a pure otoacoustic emission signal of the distorted region is obtained. In addition, the invention provides a signal detecting system. According to the signal detecting method and system, due to the fact that the time domain frequency-modulated signal is taken as the stimulation signal for stimulation, the signals of the reflection region and the distorted region are separated preliminarily according to the nonlinear characteristic of the otoacoustic emission signals, the pure otoacoustic emission signal is obtained by conducting filtering on the separated signal through a time-frequency domain filter, the detecting accuracy is improved, multiple frequencies within an extremely wide frequency range can be detected at a time, and the detecting efficiency is improved.

The invention discloses a bone conduction earphone equalization method based on stimulation frequency otoacoustic emission. The method specifically comprises the following steps: measuring a stimulation frequency otoacoustic emission signal, removing an evoked sound artifact by using a double-evoked technology, and respectively calculating an gas conduction otoacoustic emission transfer function between a gas conduction evoked sound and the otoacoustic emission signal and a bone conduction otoacoustic emission transfer function between a bone conduction evoked sound and the otoacoustic emission signal; calculating to obtain a gas-bone conduction difference transfer function according to the gas conduction otoacoustic emission transfer function and the bone conduction otoacoustic emission transfer function; calculating to obtain a bone conduction earphone equalization function according to the gas-bone conduction difference transfer function; and performing equalization processing on abone conduction earphone according to the bone conduction earphone equalization function. Bone conduction earphone equalization does not depend on subjective audiometry and long-term debugging any more, and the effect of the equalized bone conduction earphone can be close to a target as long as an objective reference quantity and an objective transfer function are provided.

A method of generating and measuring transiently evoked otoacoustic emissions (TEOAE) acoustic signals generated in the cochlea using a scheme of stimulating both ears simultaneously and one of each ears in a switching scheme with automated detection of contralateral suppression of TEOAE via statistical analysis of suppressed and unsuppressed responses.