43 results about "EAR NOISES" 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.

The present invention provides a noise barrier apparatus for inhibiting external noise from causing the presence of noise in an audio chamber defined by a noise barrier device and including the user's ear canal. The noise barrier apparatus may be constituted by an in-ear noise barrier device or devices or an over-the-ear device or devices. An in-ear application of the present invention provides an in-ear-canal audio receiver comprising an in-ear-canal adapter body having a tapered ear plug portion that is inserted into the user's ear canal. The adapter body further has an opening in the plug portion, an exterior annular indent, and an inner chamber coupled to the opening of the plug portion. The inner chamber of the in-ear-canal adapter body holds a transducer assembly comprising a transducer housing and a transducer or speaker. The transducer is positioned in a passage extending through the transducer housing. A torus-shaped cushion is positioned in the annular indent of the in-ear-canal adapter body. The cushion provides comfort and establishes a good seal with the user's ear, and also provides mechanical damping to inhibit propagation of external acoustic pressure waves via the noise barrier device to an audio chamber including an interior of the noise barrier device and the user's ear canal. An over-the-ear application of the present invention provides an ear cup and has a torus-shaped cushion at an interface part thereof which bears against the side of the user's head at an area surrounding the user's ear. The cushion again provides comfort, establishes a good seal with the user's head and provides mechanical damping to inhibit propagation of external acoustic pressure waves via the noise barrier device to an audio chamber including an interior of the noise barrier device and the user's ear canal. The cushion is preferably formed of a material which is at least partially plastically deformable and provides a damping ratio greater than 0.75.

The perception of sound in the absence of a stimulus external to one's own ear is commonly referred to as “tinnitus”. However, other sounds such as otoacoustic emissions, may occur in the absence of an external stimulus. These sounds may be audible or inaudible. A means of reducing such sounds is presented. For the audible case, the device first measures the sound and then injects a sound of proper frequency content thus canceling the tinnitus or otoacoustic emission. The inaudible case requires other means of sensing the perceived sound. Suppression of the noise perceived by one suffering from inaudible tinnitus is outlined. Such a response may be processed similar to the microphone signal acquired for the audible case. Sound of proper frequency content is then injected into the affected ear and the neurological response due to the generated sound would then cancel the inaudible tinnitus.

An in-ear noise dosimeter in the form of an earplug which senses sound in the ear canal using an eartip which has a sound delivery channel that couples sound at the end closest to the eardrum to an earplug microphone. The earplug can communicate wirelessly with a remote data collection and processing system. A dock unit for storing the earplugs when not worn can compensate for differences in unoccluded-ear versus occluded-ear responses by an acoustic compensator. An electronic compensation filter can be modified by a proximity switch in the earplug which changes state when the earplug is worn in the ear versus stored in a dock unit. The dosimeter can also have a temperature sensor for sensing human body temperature and remotely-located wireless LEDs used to alert the user of high noise dosage. Data can also be downloaded from the earplug using a reader unit.

The embodiment of the invention provides an active noise reduction method and device, relates to the technical field of audio, and can weaken the interference of abnormal noise and improve the stability of an earphone. The method is applied to an earphone with an ANC function, wherein the earphone comprises a reference microphone and an error microphone, and the earphone is in an ANC working mode. The method comprises the steps of detecting whether abnormal noise exists or not, collecting sound signals through the reference microphone and the error microphone of the earphone under the condition that the abnormal noise exists, and generating a reverse noise signal according to the sound signal collected by the reference microphone and the sound signal collected by the error microphone, wherein the reverse noise signal is used for weakening the in-ear noise signal of the user.

A method and a device are provided for enhancing microphone signals transmitted from an earpiece of a headset. The method comprises: receiving a first signal and a second signal from an in-ear microphone and an outside microphone, respectively. The in-ear microphone is positioned at a proximal side of the earpiece with respect to an ear canal of a user, and the outside microphone is positioned ata distal side of the earpiece with respect to the ear canal. The method further comprises: digitally filtering out in-ear noise from the first signal using the second signal as a reference to therebyproduce a de-noised signal. The method and the device for enhancing microphone signals transmitted from an earpiece of a headset have the advantage that the sound quality of the microphone signals transmitted from an in-ear microphone can be significantly enhanced.

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.

The invention relates to a multifunctional ear-noise-throat detector, comprising a head and a handle which are jointed with each other, further comprising an independent integrated camera-shooting and lighting unit; the camera-shooting and lighting unit is mounted on the head and is connected with a lead arranged in the head to realize image data transmission. Doctors clearly and comprehensively know disease condition by observing pictures on a display device so as to accurately diagnose, and also adjust an irradiation angle and a camera shooting angle under a condition that doctors are not close to an oral cavity, a nasal cavity or an ear cavity of patients, so that operations are convenient and flexible; and a light information transmission tube arranged on the camera-shooting and lighting unit can irradiate and shoot images for the disease at short range, so that effects are better, and images are clearer; furthermore, the detector further is provided with a tongue depressor which can be popped up and changed; doctors can finish a tongue depressing operation and a lighting and image shooting operations for disease of the oral cavity and a throat with a hand, so that the multifunctional ear-noise-throat detector can be used conveniently, and can effectively avoid cross infection of doctors and patients, therefore the multifunctional ear-noise-throat detector is healthful and safe.

There is provided a method for determining a noise exposure level associated as the cause of an observed evolution of hearing acuity of an individual of known gender. The method comprises the following steps: 1) providing a first audiogram of the individual measured at age X and a second audiogram of the individual measured at age Y; 2) inputting the individual's gender, age X, and a time period equal to Y−X in a statistical hearing threshold levels evolution prediction formula; 3) calculating projected hearing loss audiograms specific to each of a plurality of possible noise level exposure values, using the prediction formula; 4) comparing a pattern of each calculated projected audiogram with a pattern the second audiogram; 5) selecting the projected audiogram that best fits the second audiogram; and 6) assuming that the noise exposure level value associated with the selected projected audiogram is the noise exposure value that caused the evolution of hearing acuity observed between the first and the second audiograms. There is also provided systems for performing the method and methods for providing services to clients or enabling users regarding determination of real ear noise exposure values.

A noise-reduction horn comprises a horn unit and a microphone, the noise-reduction horn further comprises a horn protecting cover, the horn protecting cover is disposed on a sound outlet of a basic rack of the horn unit, the microphone is disposed on the horn protecting cover, and the horn protecting cover is further provided with a plurality of sound out-going holes. The microphone is disposed on the horn protecting cover, the volume of a magnet in the horn unit can be made to be very small, and a nonporous sheet-shaped magnet can also be used, so the diameter of the noise-reduction horn can be less than 15mm and even can reach 6mm; the design structure can be applied to products of a headset, even an in-ear noise-reduction earphone which is a smaller mechanism, and the like; a sound made by a vibrating diaphragm can be acquired and analyzed by the microphone at the first time, and the analysis and offset can be rapidly and fully performed on environment noises; and the noise-reduction horn has the advantages of simple structure, the good noise-reduction effect, large-scale mass production, the distortionless generated sound and the like, and the noise-reduction horn is suitable for being made with a large dimension or a small dimension.

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 provides a filter parameter configuration method of a noise reduction earphone and an active noise reduction earphone. The method comprises the steps that a configuration instruction is received, and the configuration instruction is used for indicating the noise reduction earphone to start noise reduction configuration; according to the configuration instruction, the noise reduction amount of the noise reduction earphone is calculated in real time, and the noise reduction amount is the ratio of the audio signals collected by the extraaural microphone to the audio signals collected by the intra-aural microphone; filter parameters of the filter assembly are correspondingly searched according to a set step length in a set parameter range based on the noise reduction amount obtained in real time, and the corresponding filter parameter when the noise reduction amount is maximum is determined as a current configuration parameter of the filter assembly, wherein the filter parameters of the filter assembly are searched, the searching direction of the parameters is consistent with the noise reduction amount increasing direction; and according to the invention, the current configuration parameters are used to configure the filter assembly to perform noise reduction, so that the search efficiency is improved, the in-ear noise is relatively stable and is not sometimes large or small, and the user experience in the filter parameter configuration process is enhanced.

The invention provides an active noise reduction method and device of an earphone and a half-in-ear active noise reduction earphone. The active noise reduction method of the earphone comprises the steps that a first sound signal vector collected by a microphone array arranged on the earphone is acquired; the microphone array comprises at least one reference microphone used for collecting environment noise signals and at least one error microphone used for collecting in-ear noise signals. The method includes steps of: determining a current noise reduction parameter according to the first sound signal vector; and determining a noise reduction signal according to the current noise reduction parameter and the environmental noise signal. According to the technical scheme provided by the embodiment of the invention, the noise reduction effect of the earphone can be improved, and the earphone has excellent wearing experience and noise reduction performance.

An in-ear noise dosimeter in the form of an earplug which senses sound in the ear canal using an eartip which has a sound delivery channel that couples sound at the end closest to the eardrum to an earplug microphone. The earplug can communicate wirelessly with a remote data collection and processing system. A dock unit for storing the earplugs when not worn can compensate for differences in unoccluded-ear versus occluded-ear responses by an acoustic compensator. An electronic compensation filter can be modified by a proximity switch in the earplug which changes state when the earplug is worn in the ear versus stored in a dock unit. The dosimeter can also have a temperature sensor for sensing human body temperature and remotely-located wireless LEDs used to alert the user of high noise dosage. Data can also be downloaded from the earplug using a reader unit.

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).

An auditory sensitivity detection system based on stimulus-frequency otoacoustic emissions. The detection system comprises an audio card (2), an acoustic sensor (3), a computer (1) and a signal feedback device. An input end of a micro loudspeaker (31) is connected to the audio card (2); an output end of a micro microphone (32) is connected to the audio card (2); the signal feedback device is connected to the computer (1); an auditory sensitivity comprehensive detection system is provided in the computer (1); and a test execution system comprises an intensity sensitivity detection module based on SFOAEs and a frequency sensitivity detection module based on SFOAEs, wherein the intensity sensitivity detection module based on SFOAEs is used for determining an auditory intensity threshold value corresponding to a corresponding frequency point by detecting stimulus-frequency otoacoustic emission detection data at each frequency point, and the frequency sensitivity detection module based on SFOAEs is used for extracting a stimulus-frequency otoacoustic emission suppression tuning curve at a designated frequency point and determining the frequency sensitivity at the designated frequency point.

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.

The invention relates to a microphone and loudspeaker integrated system, and the system comprises a loudspeaker assembly which is used for converting an inputted audio electronic signal into a stimulation sound signal; a otoacoustic emission probe comprising a shell, an earphone sound guide pipe and a miniature microphone, aminiature microphone used for detecting an acoustic signal in a human earand converting the acoustic signal into an electric signal, and a microphone conditioner assembly used for conditioning the electric signal detected in the ear; and the earphone sound guide pipe and the miniature microphone are arranged in the shell, one end of the earphone sound guide pipe is connected with the loudspeaker assembly, and the other end of the earphone sound guide pipe penetrates out of the shell and is used for transmitting stimulation sound signals into ears. The precision can be improved, and the detection accuracy is improved.

The invention discloses a waterproof heat dissipation device, which adopts a split structure, and is characterized in that an air supply device arranged at an operation end generates centrifugal heatdissipation airflow, the centrifugal heat dissipation airflow enters a wearing accommodating cavity through an air inlet line, active convection heat exchange is realized on heat generated by a wearing end heat dissipation element arranged in the wearing accommodating cavity, the airflow passes through an air outlet line and dissipates the heat through the operation end, and therefore, the effectof efficient heat dissipation in a completely closed state is achieved, and the heat dissipation efficiency is greatly improved. Meanwhile, as the air supply device is not arranged at the wearing end,near-ear noise cannot be generated, and noise pollution caused by arranging a fan at a heat source position is avoided; and the wearing accommodating cavity, the control accommodating cavity, the airinlet line and the air outlet line jointly form a completely closed airflow channel, so that a relatively high waterproof grade can be realized while a heat dissipation effect is achieved. The invention further discloses the waterproof and heat dissipation intelligent glasses, the problem of heat dissipation of small-size intelligent wearable equipment is effectively solved, and meanwhile, noiseof the fan and a poor waterproof effect cannot be generated.

Hearing difficulties are the most commonly reported disabilities among Veterans. Blast exposures during explosive events likely play a role, given their propensity to directly damage both peripheral auditory system (PAS) and central auditory system (CAS) components. Post-blast PAS pathophysiology has been well-documented in both clinical case reports and laboratory investigations. In contrast, blast-induced CAS dysfunction remains under-studied, but has been hypothesized to contribute to an array of common Veteran behavioral complaints including learning, memory, communication, and emotional regulation. This investigation compared the effects of acute blast and non-blast acoustic impulse trauma in adult male Sprague-Dawley rats. An array of audiometric tests were utilized, including distortion product otoacoustic emissions (DPOAE), auditory brainstem responses (ABR), middle latency responses (MLR), and envelope following responses (EFR). Generally, more severe and persistent post-injury central auditory processing (CAP) deficits were observed in blast-exposed animals throughout the auditory neuraxis, spanning from the cochlea to the cortex. DPOAE and ABR results captured cochlear and auditory nerve / brainstem deficits, respectively. EFRs demonstrated temporal processing impairments suggestive of functional damage to regions in the auditory brainstem and the inferior colliculus. MLRs captured thalamocortical transmission and cortical activation impairments. Taken together, the results suggest blast-induced CAS dysfunction may play a complementary pathophysiologic role to maladaptive neuroplasticity of PAS origin. Even mild blasts can produce lasting hearing impairments that can be assessed with non-invasive electrophysiology, allowing these measurements to serve as simple, effective diagnostics.

A hearing screening system for testing hearing abilities of a patient includes an otoacoustic emission (OAE) module operable to perform OAE tests, a tympanometry (tymp) module operable to perform tymp tests, and at least one probe in communication with at least one of the OAE and tymp modules. The probe includes a probe tip that is configured to be positioned within an ear canal of a patient.

The invention relates to an audiometry device and the related field of use thereof, and specifically relates to an in-ear noise dosage device and a method for evaluating noise level according to operating posts. The in-ear noise dosage device comprises an in-ear noise dosimeter, special data transmission equipment and a computer. The in-ear noise dosimeter is connected with the computer through the special data transmission equipment. The in-ear noise dosimeter comprises a machine shell fitting the shape of an external auditory canal of a human body. A miniature microphone, an ultra-miniaturedigital signal processor, a battery and a communication interface are arranged in the machine shell. The device can be placed in the auditory meatus after being miniaturized, so that the device has the advantages that the noise collection points are more reasonable, the obtained noise exposure level value is more valuable, and the noise level of a post can be reflected more accurately compared with a measurement result of one or more fixed points.

The invention relates to the technical field of automobile acoustic testing, in particular to a microphone fixing device for measuring interior noises at ear positions of a driver. The microphone fixing device comprises a first U-shaped metal sheet and a second U-shaped metal sheet, wherein the bottoms of the first U-shaped metal sheet and the second U-shaped metal sheet are fixedly connected with each other; a first V-shaped block is fixed on the bottom surface of the first U-shaped metal sheet; a seat headrest rod is placed in the first V-shaped block and locked and fixed through a first bolt; a second V-shaped block is fixed on the bottom surface of the second U-shaped metal sheet; a cylindrical long rod is placed in the second V-shaped block and locked and fixed through a second bolt; a third bolt is connected with the cylindrical long rod; and a clamping nut and a U-shaped sleeve clip sleeves a screw rod of the third bolt in sequence. The microphone fixing device for measuring the interior noises at the ear positions of the driver, provided by the invention, is advantaged in that the structure of the microphone fixing device is simple; the detaching process of the microphone fixing device is simple in operation during testing; the microphone fixing device exerts an accurately positioning effect on a microphone during measuring the interior noises at the ear positions of the driver or passengers; and a problem that the testing result is not accurate enough because the microphone is not firmly fixed is effectively solved.

The invention discloses a waterproof heat dissipation device, which adopts a split structure, and the air blower arranged at the operating end generates centrifugal heat dissipation airflow, which passes through the air intake line to the wearing cavity, and the wearing end heat dissipation element arranged in the wearing cavity The generated heat realizes active convection heat exchange, and the air flow passes through the air outlet line, and the heat is dissipated through the operating end, achieving the effect of efficient heat dissipation in a completely closed state, which greatly improves the heat dissipation efficiency. At the same time, because the air blower is not installed at the wearing end, it will not generate near-ear noise, avoiding the noise pollution caused by setting the fan at the heat source; the wearing chamber, the control chamber, the air intake line and the air outlet line together form a completely closed airflow The channel can achieve a high waterproof level while achieving heat dissipation. The invention also discloses a kind of waterproof and heat-dissipating smart glasses, which can effectively solve the problem of heat dissipation of small-sized smart wearable devices, and at the same time, will not generate fan noise and poor waterproof effect.

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 a bone conduction earphone equalization method based on stimulation frequency otoacoustic emission. The method specifically includes: measuring stimulation frequency otoacoustic emission signal, using double induction technology to remove induced sound artifacts, and calculating air conduction induced sound and ear acoustic emission respectively. Air conduction otoacoustic emission transfer function between acoustic emission signals and bone conduction otoacoustic emission transfer function between bone conduction-induced speech and otoacoustic emission signals; according to air conduction otoacoustic emission transfer function and bone conduction otoacoustic emission transfer function The air-bone conduction difference transfer function is calculated; the bone conduction earphone equalization function is calculated according to the air-bone conduction difference transfer function; the bone conduction earphone is equalized according to the bone conduction earphone equalization function. The invention makes the equalization of the bone conduction earphone no longer rely on subjective listening and long-term debugging, and only needs the objective reference quantity and the objective transfer function to make the equalized effect of the bone conduction earphone approach the target.

The invention discloses an internal ear noise intensity measurement method based on variable loudness control by combining psychophysics on the basis of auditory perception and attention mechanisms of two ears. The method includes firstly, establishing sound stimulation for experimental measurement, and subjecting a sound combination with specific reference loudness and frequency to loudness control in two ways including constant horizontal sound stimulation and variable horizontal sound stimulation; then, as for each loudness control way, enabling a subject to judge experimental stimulation through playing of a target sound group for experimental measurement and determine which segment of the two kinds of horizontal sound stimulation is higher in average intensity by key pressing; finally, analyzing and fitting numerical values by acquiring sound stimulation evaluation data under combinations different in reference loudness and frequency and different variable loudness levels, and obtaining internal ear noise intensity measurement results according to a fitting formula.

The invention discloses a bone conduction earphone equalization method based on distortion product otoacoustic emission, which comprises the following steps of: measuring distortion product otoacoustic emission, and removing stimulation sound artifacts by using filtering; calculating an air-conducting otoacoustic emission transfer function between the air-conducting stimulation sound and otoacoustic emission and a bone-conducting acoustic emission transfer function between the bone-conducting stimulation sound and otoacoustic emission; calculating to obtain a gas-bone conduction difference transfer function according to the calculated sound emission transfer function of the gas conduction ear and the sound emission transfer function of the bone conduction ear; calculating to obtain an equilibrium function of the bone conduction earphone according to the gas-bone conduction difference transfer function; and carrying out equalization processing on the bone conduction earphone by using the obtained equalization function. According to the bone conduction earphone equalization method based on distortion product otoacoustic emission, an existing bone conduction earphone equalization method is improved, the method is no longer limited to subjective factor adjustment and no longer depends on main observation hearing and long-term debugging, an equalization function is calculated through objective reference quantity and an objective transfer function to equalize the bone conduction earphone, and an ideal effect can be approached.

The invention provides a baby distortion otoacoustic detection instrument. The baby distortion otoacoustic detection instrument is characterized in that electroacoustic transducers and an acoustoelectric transducer for receiving sound are arranged in a probe housing, an earphone silica gel sleeve placed in an ear is connected with the housing through a sound transmitting and receiving pipeline, and a pure sound stimulating sound system is arranged in the housing.A detection method comprises the steps that a probe transmits stimulation sound, the pure sound stimulating sound system broadcasts two paths of stimulation sound, imitating software is used for storing basic stimulation data which is generated in a header file of ear sound detection engineering, reflection sound is received, noiselevel is calculated, wave character value of a temporary domain interval in a tendency chart is calaculated, and the quality of collected signals is determined. The noise influence in the baby distortion otoacoustic detection process can be improved, the baby detection accuracy is improved, and besides, the detection duration is shortened.