73 results about "Pure tone" patented technology

An active noise control system for use in testing hearing using a pure tone audiometry testing procedure and employing multiple switching controllers with pre-filtering means and a switch to select any one controller to provide a predetermined one and having the ability to configure each switching controller so that the maximum threshold shift occurs for the frequency of the test tone and for modifying each test tone in accordance with a standard calibration frequency.

The present invention relates to a pure tone audiometer, and more particularly, to a pure tone audiometer with automated masking which is capable of automatically performing air-conduction and bone-conduction hearing tests and automatically performing a masking test, if necessary, so that a person obtains an accurate pure tone hearing threshold without others' assistance. The pure tone audiometer of the present invention can accurately perform the pure tone hearing test with automated masking without assistance from a doctor or an audiologist. Thus, with the pure tone audiometer, people can easily check their hearing ability for prevention and early detection of hearing loss and take swift action to cure hearing loss.

An encoding device which encodes audio signals comprises a spectrum power calculation unit for calculating the power of each spectrum obtained by analyzing the frequency of an input audio signal, a tonality parameter calculation unit for calculating a tonality parameter indicating the pure tone level of the input audio signal in each sub-band, using the result of the calculation when dividing the frequency range of the spectrum of the input audio signal into a plurality of sub-bands, and a dynamic masking threshold calculation unit for calculating a dynamic masking threshold value of the masking energy of the input audio signal, using the calculated tonality parameter.

An audio-signal-processing apparatus includes a band-decomposition unit utilizing a band-decomposition characteristic based on the harmonic-tone composition of musical instruments. A low interval limit generates the harmonic-tone to each band signal after decomposing the bass signal into a plurality of band signals. The audio-signal processing apparatus generates a harmonic-tone individually for each pure tone component, which includes complex tones and suppresses deterioration of the sound quality.

The invention discloses a fitting method and device for a hearing earphone, and relates to the field of mobile Internet services. One specific embodiment of the method comprises the following steps: acquiring a user hearing threshold test result, transmitting the hearing threshold test result to a server, and further receiving target compensation gain values of all frequency bands calculated basedon hearing earphone configuration information; and sending the generated pure tone signal to a hearing earphone for playing, receiving sound in an ear canal through an inner ear microphone arranged in the hearing earphone so as to receive voice information after the pure tone signal is played, and further adjusting gain data of each frequency band so as to approach a corresponding target compensation gain value. Therefore, according to the embodiment of the invention, the problems of low fitting efficiency and reliability and high cost of the existing hearing earphone can be solved.

This invention is for a percussion instrument that when struck produces a sustained tone. The instrument is shaped to produce a harmonious tone by tuning the appropriate overtones. The fundamental tone generated by the instruments disclosed herein are controllably tunable to within fractions of a hertz (Hz). Also disclosed are instruments that minimize and dampen unwanted overtones to generate a substantially pure tone. Also provided are related methods for generating a sustained tone as well as methods and devices for generating a beat, wherein a pair of the percussion instruments of the present invention having different tone frequencies provide the beat.

The invention relates to a pure tone-based tinnitus treatment system comprising a control module, an audio playing module, a micro-current generation module, a pure-tone voice frequency and an earphone. The control module controls the audio play module to play pure-tone audios in a random way and eliminates pure-tone frequency in an octave with tinnitus frequency as central frequency; the earphone is provided with conductive electrodes; the micro-current generation module is connected with the conductive electrodes; when the pure-tone audio is played, a micro-current pulse signal is produced, so a nervivagus passing through the surrounding of an auditory meatus can be excited. Compared with the prior art, with pure-tone excitation and nervivagus excitation, a central pivot cortex can be inducted in an orientated way to produce favorable neuroplasticity changes; and tinnitus perception changeover and pathological central pivot plasticity changes can be achieved. Different from a traditional treatment method, a personalized sound treatment method is designed for a tinnitus occurrence mechanism; and great tinnitus treatment effect can be achieved; and the treatment process is simple and convenient.

The invention relates to a method to design and generate frequency-specific electrical or acoustical stimuli for the recording of auditory steady-state responses, ASSR, from human individuals, where the stimuli are generated as a combination of a series of three or more spectral components (i.e. pure tones), each having a specified frequency, amplitude and phase and where the frequency difference between the successive pure tones in the series preferably is constant=fs. The invention further relates to a device for detection of ASSR and to a software program for use in such device.

The present invention provides a de-noising system. The de-noising system comprises a microphone, an acceleration sensor, a first signal channel, a second signal channel, an inverter and a processor; wherein two ends of the first signal channel are electrically connected with the acceleration sensor and the inverter, the second signal channel is electrically connected with the acceleration sensor and is used for outputting a mechanical vibration signal acquired by the acceleration sensor, the microphone and the inverter are electrically connected with the processor. The de-noising system provided by the invention can obtain a pure tone signal in which mechanical noise is eliminated, thus communication quality of a communication product can be improved. The invention also provides a de-noising method of the de-noising system.

The invention relates to an implanted piezoelectric ceramic microphone and a manufacturing method thereof, belonging to the field of biomedical engineering bionics. The microphone comprises a piezoelectric ceramic twin lamella, a preamplifier chip and a shielding case. The preamplifier chip is stuck and fixed at one end of the piezoelectric ceramic twin lamella in a stickiness manner by biogum so as to form a fixed component which is arranged in the shielding case; the piezoelectric ceramic twin lamella is connected with one site of the preamplifier chip by micro welding; and the preamplifier chip is also connected with a signal output wire, a working power wire and a grounding wire by micro welding. The microphone can realize the purpose of being implanted in vivo completely by a way of being directly coupled and fixed on malleus, and have higher sensitivity and better frequency response property to the test of pure tone signals between 100 and 20000Hz. Being proved by experiment, the microphone can replace outboard microphone to transmit and convert acoustic signals.

The invention provides a pure tone audiometric system formed by utilizing a digital sound card. The pure tone audiometric system includes an air conduction earphone, a bone conduction earphone, a loudspeaker, a transponder and link cables. The pure tone audiometric system is characterized in that: a computer and a USB sound card are also included; the air conduction earphone, the bone conduction earphone, the transponder and the loudspeaker are connected with specified sockets of the USB sound card by the link cables, respectively; the USB sound card is mounted on a USB interface of the computer to act as a signal output device. Compared with the prior art, the pure tone audiometric system of the invention is overwhelmingly more competitive in production cost than traditional analog electric audiometric apparatuses; and as the software is possible to be produced in quantity, the whole system has good extensibility and is allowed to do more abundant designs in functions and develop more user-friendly interactive interface.

The invention relates to a method to design and generate frequency-specific electrical or acoustical stimuli for the recording of auditory steady-state responses, ASSR, from human individuals, where the stimuli are generated as a combination of a series of three or more spectral components (i.e. pure tones), each having a specified frequency, amplitude and phase and where the frequency difference between the successive pure tones in the series preferably is constant=fs. The invention further relates to a device for detection of ASSR and to a software program for use in such device.

The invention belongs to the technical field of medical treatment and particularly relates to a method for generating hearing loss treatment sounds and a hearing loss treatment system. The method forgenerating the hearing loss treatment sounds and the hearing loss treatment system aim at achieving the technical purpose of achieving a good treatment effect on patients suffering from tinnitus. According to the adopted technical scheme, the method for generating the hearing loss treatment sounds includes the steps that S101, a tinnitus occurrence frequency region of a patient is collected; S102,a pure tone threshold audiogram of the patient is obtained; S103, the tinnitus occurrence frequency region and the pure tone threshold audiogram are compared and tested, and then central frequenciesof the treatment sounds are obtained; S104, on the basis of the central frequencies of the treatment sounds, multiple frequency point sounds are selected upwards and downwards to form stimulation sounds including the central frequencies; S105, the frequency point sounds including the stimulation sounds are modulated to synthesize the treatment sounds. The method for generating the hearing loss treatment sounds and the hearing loss treatment system are applicable to the field of hearing loss treatment.

Disclosed herein is a pure tone test apparatus including: a stage including a support supporting a pure tone test target; a support plate mounted on one side of the stage and having a guide mounted on a front surface thereof; an acoustic detection unit movably mounted on the guide and being engaged with the support to detect noise generated from the target; a control unit connected with the guide, the acoustic detection unit, and the support to control a pure tone test; and a display unit displaying a pure tone test result detected by the control of the control unit.

The invention relates to a pure tone audiometric and psychophysical tuning curve detecting system which comprises a computer, a multimedia sound card, a handheld USB (universal serial bus) handle, a miniature loudspeaker and an earplug. At least two buttons are arranged on the handle, the miniature loudspeaker comprises at least two electricity-sound transducer, and an input end of the miniature loudspeaker is connected with the sound card while an output end of the miniature loudspeaker is connected with the earplug; an audiometer platform is arranged in the computer and comprises a hardware driving system and a test executing system; and the hardware driving system comprises a sound card driver connected with the sound card and a multimedia programming interface connected with the handle, and the test executing system comprises a pure tone audiometric detecting module and a psychophysical tuning curve detecting module. The pure tone audiometric and psychophysical tuning curve detecting system not only can carry out complete pure tone audiometry, but also can carry out psychophysical tuning curve detection, and can be widely applied to comprehensive detection for an auditory system of a testee.

The present invention provides a sounding device and a method for manufacturing the sounding device. The sounding device comprises a vibration system, a magnetic circuit system, and a housing for housing the vibration system and the magnetic circuit system, wherein the vibration system includes a first diaphragm fixed to the housing, a voice coil disposed under the first diaphragm and used for driving the first diaphragm to vibrate, and an elastic support member disposed under the voice coil, fixed to the housing and elastically supporting the voice coil; the elastic support member comprises aflexible circuit board connected to the voice coil and a second diaphragm fixedly connected to the bottom of the flexible circuit board; the housing comprises a basin frame; the elastic support member is fixed to the basin frame; and the flexible circuit board is fixedly attached to the second diaphragm. In the present invention, the flexible circuit board is attached and fixed to the second diaphragm to form an integrated structure. Thus, when the height of the sounding device is constant, the vibration space of the second diaphragm can be saved, the Xmax range of a product can be improved,and the pure tone yield of the product is improved while the assembly processes are reduced.

The invention discloses a pure-tone audiometry method and device, and is used for testing a person to be tested. The method comprises the following steps: providing a first testing stimulation to the person to be tested, wherein the first testing stimulation comprises a first frequency and a first strength, and the first testing stimulation is selected from one of N testing tones, wherein N is an integer, N is larger than and equal to 2 and is smaller than and equal to 5, m testing tone in the N testing tones comprises m short tones, and m is larger than and equal to 1 and is smaller than and equal to N; receiving a response corresponding to the first testing stimulation. The invention also discloses a pure-tone audiometry device.

PCT No. PCT / GB93 / 01106 Sec. 371 Date Dec. 16, 1994 Sec. 102(e) Date Dec. 16, 1994 PCT Filed May 27, 1993 PCT Pub. No. WO93 / 26086 PCT Pub. Date Dec. 23, 1993In signal processing circuitry using active devices, non-linearity of the device causes distortion of pure tones and the generation of intermodulation products for more complex signals. The transfer characteristics of such active devices may be considered as the accumulated characteristics of input and output filter stages separated by a non-linear region. To compensate for non-linearities and reduce intermodulation products, a drive circuit comprises pre- and post-correction filters separated by a compensating amplifier. The frequency response of the pre-correction filter corresponds to that of the input filter stage but is reversed in the frequency spectrum; with conventional I.F. the transfer characteristic of the amplifier and frequency response characteristic of the post-correction filter are the respective complements, of those of the non-linear region and pre-correction filter. The circuitry may be extended to compensate for active devices having more than one non-linear region and has particular application to klystron amplifiers used in broadcast television transmitters.

The invention relates to an in-ear detection method and system. The system comprises an in-ear-canal microphone, an out-ear-canal microphone, a receiver and a processor. The in-ear-canal microphone is used for acquiring sound in the ear canal and sending the sound to the processor; the external auditory meatus microphone is used for acquiring sound outside the auditory meatus and sending the sound to the processor; the telephone receiver is used for playing sound; and after the processor controls the receiver to send out pure tone signals with different frequencies, the difference between the received signal strength of the microphone in the ear canal and the received signal strength of the microphone outside the ear canal is calculated, and therefore the wearing condition is judged. Other types of sensors do not need to be introduced, only an acoustic system necessary for the hearing aid is utilized, the complexity of system design is reduced, and the high reusability of an original acoustic system is achieved.

The invention belongs to the technical field of medical treatment, and discloses a system and a method for ear-nose-throat examination image screening control, and an application. The control system comprises: a camera shooting module, a lighting module, a main control module, an image processing module, a tinnitus diagnosis module, a nasal cavity diagnosis module, a throat diagnosis module, and adisplay module. The method include: collecting noise images of examination position images of an ear, a nasal cavity, and a throat by using a basic model of a fully differential reconstruction algorithm based on a non-local mean regularization item through the camera shooting module; through the image processing module, processing the images collected by the camera shooting module; using a pure tone threshold detection method to detect pure tone hearing thresholds of both ears through the tinnitus diagnosis module. The system and the method greatly improve reliability of examined image and are beneficial to a doctor for accurate diagnosis. At the same time, the tinnitus diagnosis module greatly shortens matching time of tinnitus frequency, increases fault tolerance capability, and solvesa problem in the prior art that tinnitus frequency is possible to be leaked in detection, and improves diagnosis effect.

The embodiment of the invention discloses a masking threshold estimation method and device, electronic equipment and a storage medium. The method comprises the following steps of: acquiring an amplitude spectrum of a noisy voice signal, and acquiring an amplitude spectrum of a noise signal in the noisy voice signal; determining the voice characteristic spectrum deviation of the noisy voice signal according to the amplitude spectrum of the noisy voice signal and the amplitude spectrum of the noise signal, and determining the voice characteristic flatness according to the amplitude spectrum of the noisy voice signal; determining pure tone coefficients of different frequency bands in the noisy voice signal according to the voice characteristic spectrum deviation and the voice characteristic flatness; determining an intermediate masking threshold according to the power spectrum of the noisy voice signal, the amplitude spectrum of the noisy voice signal and the pure tone coefficient; and determining a target masking threshold according to a comparison result of a predetermined absolute masking threshold and the intermediate masking threshold. According to the masking threshold estimation method and device, the electronic equipment and the storage medium of the embodiment of the invention, the accuracy of masking threshold estimation can be improved, the noise suppression result can be effectively enhanced, and the voice recognition effect is improved.

The application provides a system and method for pure tone auditory threshold test skill training. The skill training cost can be reduced. The system comprises a subject model assembly and an audiometer panel assembly, a pure tone auditory threshold auditory mode selected by an auditory tester is received, a bone conduction earphone and / or an air conduction earphone is worn for a subject model, and the position information of the bone conduction earphone and / or the air conduction earphone is sensed; mapping relation is inquired to obtain the position information mapped by the selected pure tone audiometry mode, whether the sensed position information is matched with the obtained position information or not is judged, and a sensed position information judgment result is prompted; channel information is received, the mapping relationship is inquired to obtain the channel information mapped by the received pure tone audiometry mode, whether the received channel information is matched withthe obtained channel information or not is judged, and a set channel information judgment result is promoted; and the audiometer panel assembly is used for receiving channel information set by an audiometer according to the selected pure tone hearing threshold audiometry mode and the received channel information is outputted to the subject model assembly.

The invention provides a hearing test method and system. The method comprises the following steps: detecting whether an earphone is successfully connected with an intelligent terminal; obtaining identity information of the earphone; calling standard audio signals for hearing test matched with the earphone from a cloud database according to the identity information of the earphone, and playing thestandard audio signals in the intelligent terminal to perform the hearing test, wherein the cloud database stores standard audio signal sets for hearing test matched with different types of earphonesof various brands, each standard audio signal set for hearing test comprises standard audio signals for hearing test matched with the corresponding earphone at different sound intensity positions of various frequencies, and each standard audio signal for hearing test comprises a standard pure tone signal for test and an inverse signal of noise generated by the corresponding earphone in use. By adoption of the hearing test method and system provided by the invention, various earphones can be used for testing, special processing of the earphones is not needed, and the test result is relatively accurate, and the hearing test method and system are suitable for the field of hearing detection.

The invention is suitable for the technical field of earphones, and provides a method and a device for acquiring the sound pressure level of an earphone, and the earphone. The method comprises the following steps: acquiring an audio digital signal input into the earphone; according to a frequency response curve of the earphone, performing frequency response weighting processing on the audio digital signal to obtain an original sound pressure level of the audio digital signal after passing through the earphone; and performing frequency weighting on the original sound pressure level to obtain the hearing sound pressure level of the earphone. According to the invention, the frequency response weighting processing is carried out on the audio digital signal according to the frequency response of the earphone, the original sound pressure level of the audio digital signal after passing through the earphone is obtained, the hearing sound pressure level of the earphone is obtained after the frequency weighting is carried out on the original sound pressure level, and the frequency weighting simulates the response of human ears to pure tones with different loudnesses. The finally obtained sound pressure level is closer to the real feeling of human ears, and hearing protection of a user is facilitated.

A user adaptive hearing aid self-fitting method based on a neural network comprises the following steps: fitting a group of initial signal processing parameters according to an audiogram obtained by pure tone audiometry of a user; performing multiple rounds of speech audiometry and parameter adjustment through a hearing aid which is worn by a user and is pre-adjusted with the signal processing parameters; wherein after each time of speech audiometry is completed, the speech audiometry recognition probability model based on the neural network predicts the recognition probability of the user on different speech audiometry corpora under various parameter groups according to the speech audiometry record of the user; the parameter group optimization system obtains several parameter groups enabling the speech audiometry recognition rate of the user to be the highest for the user to select according to the prediction result, and parameters continue to be finely adjusted based on the parameter groups selected by the user; and performing speech audiometry and parameter adjustment continuously and iteratively until the hearing aid is deployed to meet a predetermined hearing aid effect. According to the invention, the fitting of the hearing aid is convenient, and the accuracy of the fitting result is improved at the same time.

The invention discloses a variable-pressure pure-tone audiometry device which comprises a sealing ear cover, an earphone, a hearing meter, an air inflation and deflation device, an MCU controller anda pressure sensor, wherein the earphone and the pressure sensor are both fixed in the sealing ear cover, the earphone is connected with the hearing meter, the air inflation and deflation device is connected with the sealing ear cover and can be used for inflating or deflating the sealing ear cover, the air inflation and deflation device is connected with the MCU controller, and the pressure sensoris connected with the MCU controller. The invention further discloses a variable-pressure pure-tone audiometry method which comprises the following steps: S1, acquiring a pure-tone air-conduction hearing threshold value under normal pressure; S2, setting the test sound intensity; S3, carrying out hearing test under the variable pressure and recording a test result; S4, repeating the steps S2-S3 to obtain a whole-frequency-band test result. According to the invention, a simple method is adopted, and air pressure adjustment can be carried out in a pure tone sounding process, the listening function monitoring is realized and more diagnosis information is provided, and the testing efficiency is improved, a means is provided for improving the accuracy of the listening function test, and a verification tool is also provided for other hearing inspection methods. The device and the method are a novel device and method for conveniently testing the sound transmission state of the middle ear.

A method of generating sounds for reducing an effect of tinnitus is disclosed. The method includes the following steps: acquiring a sound frequency of a tinnitus sound of a user, and playing a plurality of pure tones within a frequency range during a playback time, wherein the plurality of pure tones include a plurality of first pure tones and a plurality of second pure tones; the plurality of first pure tones and the sound frequency are located at a first frequency area, and the plurality of second pure tones are located at a second frequency area; the first frequency area covers X Hz, where 100≤X≤12000, the second frequency area covers the remaining portion of the frequency range excluding the first frequency area, and the plurality of first pure tones accounts for M % of the plurality of pure tones, where 50<M≤90.

An improved tuning method for fixed interval musical instruments is provided. This Precise Temperament tuning method provide mathematically consistent intervals between notes to prevent dissonance within chords while retaining the esthetics of pure tones associated with Western music.