81results about How to "Reduced amplification" patented technology

The present invention relates to a method for adapting a hearing aid with at least one input converter, a signal processing device and an output converter by using a genetic feature of the wearer to whom the hearing aid is to be adapted. Depending on the genetic feature, at least one adaptable parameter is adapted by the signal processing device. The invention further relates to a hearing device system which can be adapted to the hearing device wearer as a function of a genetic feature.

In order to handle platter flutter in a hard disk operated at high speed (e.g. 10,000 RPM) and maintain tracking of read / write head, peak filters are added to a head tracking servo feedback loop. In some embodiments, several lag-lead type peak filters centered at a plurality of flutter mode frequencies are provided to process a Position Error Signal (PES) read from the read / write head. The several filter are preferably arranged in series (i.e. to operate on the PES sequentially), alternatively the filters can be arranged in parallel. Phase lags and leads caused by the several filters partially cancel at frequencies intermediate center frequencies of the several filters. According to another embodiment two or more, preferably three narrow band filters are used to cover the spectrum of each flutter mode. In a configuration mode, a spectrum of the flutter modes can be obtained and used to set the center frequencies, and bandwidths of filters used to filter out the flutter modes.

A method for counteracting the occlusion effect of an electronic device delivering an audio signal to the ear, like a hearing aid or an active ear protector, where the electronic device includes a transmission path with an external microphone or input line which receives a signal from the environment and an signal processor and a receiver which receives processes signal from the signal from the signal processor and delivers sound signals to the ear, whereby an ear piece is inserted into the ear canal and totally or partially blocks the canal. The sound conditions in the cavity between the ear piece and the tympanic membrane are directly or indirectly determined, and whenever condition leading to occlusion problems are determined, the transmission characteristics of the transmission path or the receiver changes in order to counteract the occlusion effect.

Disclosed is a hearing device system comprising at least one hearing aid circuitry and at least one active noise cancellation unit, the at least one hearing aid circuitry comprises at least one input transducer adapted to convert a first audio signal to an electric audio signal; a signal processor connected to the at least one input transducer and adapted to process said electric audio signal by at least partially correcting for a hearing loss of a user; an output transducer adapted to generate from at least said processed electric audio signal a sound pressure in an ear canal of the user, whereby the generated sound pressure is at least partially corrected for the hearing loss of the user; the at least one active noise cancellation unit being adapted to provide an active noise cancellation signal adapted to perform active noise cancellation of an acoustical signal entering the ear canal in addition to said generated sound pressure, wherein the hearing device system further comprises a combiner unit adapted to combine the processed electric audio signal with the active noise cancellation signal, to obtain a combined signal and to provide the combined signal to the output transducer.

Provided is a semiconductor integrated circuit according to an exemplary aspect of the present invention including a data transmitting circuit that transmits data in parallel through a plurality of signal lines and a data receiving circuit that receives the data. The data transmitting circuit includes a plurality of data output circuits that output the data in a data transmission mode or set an output to a high impedance state in a HiZ mode, a plurality of data selection circuits that select one of the data and fixed data and output the selected data to the data output circuits, and a control circuit that controls the data output circuits to output the fixed data during a period between a time when a mode is switched from the HiZ mode to the data transmission mode and a time when the data output circuits start to output the data.

A perpendicular magnetic recording disk is provided. The perpendicular magnetic recording disk includes an underlayer between a substrate and a perpendicular magnetic recording layer for inducing perpendicular orientation of the perpendicular magnetic recording layer, the perpendicular magnetic recording layer having a thickness in the range where the ratio of perpendicular coercivity Hc to maximum perpendicular coercivity Ho decreases with reduced thickness of the perpendicular magnetic recording layer.

A hard disk has a servo loop and a rotating storage medium. The rotating storage medium has one or more significant flutter modes at frequencies below a zero cross frequency of a rejection transfer function of the servo loop. The effect of the forgoing is to allow the servo loop to better track a rotating medium that is subject to significant flutter. Peak filters with frequency bands that substantially overlap frequency bands of the significant flutter modes can also be added to the servo loop to further improve tracking. Multiple narrow band filters with frequency bands overlap can be used to cover the spectrum of a single flutter mode. Two lag-lead filters, the frequency responses of which overlap can be used to cover two adjacent significant flutter modes. At frequencies intermediate to the two adjacent flutter, modes, the lead caused by one filter, will be cancelled by the lag caused by the second.

The invention relates to an enclosed animal experiment operation box and aims to solve the problems that the conventional pharmacological animal experiment causes environmental pollution which causes damage to instruments and equipment and influences experimenters' health, the operation view is not clear, and the light is insufficient. The enclosed animal experiment operation box comprises a box body and an operational table assembled inside the box body and used for fixing an experimental animal, and is characterized in that the box body comprises a base, a frame, a front baffle, a back baffle, a left baffle, a right baffle and an erector, fixed limiting posts and adjustable limiting posts are arranged on the operational table and limited to the rails of the base, guiding rods and an adjusting screw rod used for controlling the erector to move are arranged on the base, and a magnifier is arranged in the picture frame of the erector. According to the invention, the enclosed animal experiment operation box has the advantages of being simple in operation, convenient to adjust and the like, and provides modern experimental equipment with a clean and excellent working environment; the view is clean and the light is sufficient when experiments are carried out; the accuracy and the success rate of the experiments are significantly improved, and the experimental appropriation expenditure is reduced.

The transmission power of a fill level radar is varied in that the transmission power is switched, by a signal switch, from a first transmission power to a second transmission power. This switching takes place, for example, by bypassing the high-frequency amplifier or by switching off a drain voltage.

The invention discloses a human STRtyper PCR enlarged fluoroscopic examination reagent kit with quick speed detecting, accuracy, good repeatability, good versatility, low price and practicality. The applicability of the reagent kit for Chinese is remarkable in particular. The serial products of the invention comprise the three following kits: (1) a STRtyper-20G kit with the largest STR gene locus of the global and most powerful recognizing ability; (2) a STRtyper-16GC kit which is more suitably used to build a criminal DNA database of Chinese population and identify the identity; (3) a STRtyper-10F / G kit with brand new STR gene locus. Each kit product comprises the component of 1.1 ml * 1 tube of STR PCR reaction mixture; 0.55 ml * 1 tube of STRtyper primer mixture; 120 microlitre * 1 tube of HS-Taq DNA polymerase; 0.3ml * 1 tube of STR control DNA; 50 microlitre * 1 tube of STRtyper allelomerphic gene mixture; 0.5 ml * 1 tube of internal standard; 30 microlitre* 1 tube of 310 spectrum correcting standard; 30 microlitre * 1 tube of 3100 spectrum correcting standard.

Provided is a semiconductor integrated circuit according to an exemplary aspect of the present invention including a data transmitting circuit that transmits data in parallel through a plurality of signal lines and a data receiving circuit that receives the data. The data transmitting circuit includes a plurality of data output circuits that output the data in a data transmission mode or set an output to a high impedance state in a HiZ mode, a plurality of data selection circuits that select one of the data and fixed data and output the selected data to the data output circuits, and a control circuit that controls the data output circuits to output the fixed data during a period between a time when a mode is switched from the HiZ mode to the data transmission mode and a time when the data output circuits start to output the data.

The invention discloses a primer set, a method and a kit for Long-range PCR (polymerase chain reaction) detection of a BRCA (breast cancer susceptibility gene) 1 and a BRCA 2. The primer set comprises 18 primer pairs altogether, wherein the primer pair 1 comprises a forward primer BR1_P6.1F: 5'-ACGTTGCGGAGAGGTGAG-3' and a reverse primer BR1_P6.1R: 5'-TAGCCAGGCATAGTTGCACA-3'; the second primer pair comprises a forward primer BR1_P6.2F:5'-CTCCACCTCCCTGGTTCAGT-3' and a reverse primer BR1_P6.2R:5'-AGCTTTGTGGTGAGGTGTTG-3'; the third primer pair comprises a forward primer BR1_P7F:5'-GGCTCAAAGGACCTCCTACC-3' and the reverse primer BR1_P7R:5'-AGGCAGAGGAACCTCTT GAA-3'. The primer set, the method and the kit have the benefits that the detection method requires few primers, enrichment can be effectively performed on BRCA1 and BRCA2 target areas, and single amplified bands are clear. The time is obviously shortened with the technique, and costs are also greatly reduced.

The invention concerns a method for counteracting the occlusion effect of an electronic device delivering an audio signal to the ear, like a hearing aid or and active ear protector, where the electronic device comprises a transmission path with an external microphone or input line which receives a signal from the environment and a signal processor and a receiver which receives processes signal from the signal from the signal processor and delivers sound signals to the ear, whereby an ear piece is inserted into the ear canal and totally or partially blocks the canal. According to the invention the sound conditions in the cavity between the ear piece and the tympanic membrane are directly or indirectly determined, and whenever conditions leading to occlusion problems are determined, the transmission characteristic of the transmission path to the receiver changes in order to counteract the occlusion effect.

An oscillator circuit is a closed loop including an amplifying circuit and a feedback circuit. The amplifying circuit includes a pair of amplifiers, which also function as impedance buffers, and a first phase-shift circuit. The feedback circuit includes a second phase-shift circuit and a piezoelectric vibrator. The second phase-shift circuit is capable of adjusting the phase and gain of the feedback circuit. The first phase-shift circuit of the amplifying circuit is arranged between the pair of amplifiers and is separated, in terms of impedance, from the second phase-shift circuit. The first phase-shift circuit is capable of adjusting the phase of the entire closed loop.

The ratio-controlling hydraulic pressure in a continuously variable cone-pulley transmission is regulated by means of a regulating device in such a way that the control parameters of the regulating device are adjusted depending on the amounts of ratio-controlling pressure to be applied and that the regulation is performed by using the adjusted control parameters. The method includes measures for maintaining a set transmission ratio at a continuing constant level.

The invention belongs to the field of electric system state monitoring, and particularly relates to a voltage sag detecting method suitable for a dynamic voltage restorer. The method includes the steps of establishing phase shifting components through the three selected detection points which include the front detection point, the middle detection point and the rear detection point and are arranged at equal intervals, obtaining a d-axis DC component and a q-axis DC component of a fundamental wave through a Butterworth low-pass filter after alpha beta-d q conversion is conducted on the detection points and a middle sampling point, conducting quadratic sum addition on the d-axis DC component and the q-axis DC component and calculating through a root-mean-square to obtain a voltage amplitude, conducting arc-tangent function operation on the quotient obtained by dividing the q-axis DC component by the d-axis DC component, and obtaining a phase jump angle through the difference between the phase detection value at the earlier moment and the phase detection value at the later moment. By means of the method, the certain white noise resistance is still achieved while the real-time requirement is met, and the method is quite suitable for detecting voltage sags in the dynamic voltage restorer.

A method suppresses feedback in a hearing instrument. A microphone generates an input signal and a loudspeaker generates an acoustic signal which is partially fed back to the microphone via an acoustic feedback path. An intermediate signal is generated along a main signal path depending on the input signal, and an output signal is formed on the basis of the intermediate signal. A voice activity of a user is monitored, a transfer function of an electro-acoustic closed signal loop formed by the main signal path and the feedback path is estimated, that, depending on the transfer function of the closed signal loop and the voice activity of the user, the intermediate signal is decorrelated to form the output signal. A compensation signal is generated from the output signal and is fed to the input signal for feedback compensation, and the output signal is fed to the loudspeaker for reproduction.

The technology described herein relates to detecting the presence of one or more specific nucleic acids, e.g. determining the genotype of one or more allelic target site loci.

The invention relates to the technical field of molecular biology, and discloses a kit and a method for detecting COVID-19 virus by combining nested isothermal amplification with gene editing. The kitcomprises: (1) a nested isothermal amplification system: adopting a nested amplification mode, wherein an outer primer pair is used for a first round of isothermal amplification, an inner primer pairis used for a second round of isothermal amplification, a product of the first round of isothermal amplification can be used as a template of the second round of isothermal amplification, and the inner primer pair is used for isothermal amplification; (2) a nucleic acid detection system based on gene editing: using a Cas13a protease and a specific probe to identify a nested RAA enriched templatewith a target sequence; and (3) a visual detection system: utilizing a transverse flow test strip to quickly judge whether virus molecules exist or not. The kit is simple and convenient to operate, does not need complex temperature control equipment, is rapid and efficient, can interpret a result in only one hour, has extremely high amplification efficiency, can detect five copied virus molecules,and is low in pollution risk.

The present invention provides methods for amplifying a nucleic acid from a sample containing a mixture of nucleic acids utilizing a solid support. Methods are provided utilizing user-defined primer oligonucleotides for directional amplification that assists in further manipulation of the target nucleic acid, such as sequencing. Methods are also provided utilizing blocker and displacer oligonucleotides for generating amplified target nucleic acids of defined length. One of these methods provides a first oligonucleotide and a second oligonucleotide affixed to a solid support or separate solid supports. The first oligonucleotide is blocked to prevent extension from the 3′-terminus and has a sequence complementary to a first portion of a target nucleic acid. The second oligonucleotide has a sequence that is identical to a second portion of the target nucleic acid. In this method, a sample is applied to the solid support and the target nucleic acid within the sample binds said first oligonucleotide. The solid support is then washed to remove unbound nucleic acids. A primer sequence containing a target binding region and a polymerase promoter sequence is then annealed to the bound target nucleic acid and extended producing a first duplex nucleic acid. The target sequence is then removed leaving a first nucleic acid that can now bind the second oligonucleotide. The second oligonucleotide is extended to produce a second duplex nucleic acid that contains a second nucleic acid. The second nucleic acid is then amplified by adding a polymerase.

Apparatus and methods for removing jitter and stabilizing the feed back system of a torsional hinged device with minimal changes to the system. The stabilization is accomplished by introducing a selected amount of lateral motion (in addition to the rotational motion) by creating asymmetry in the oscillating device or the drive torque applied to the device.

An AC adapter unit compactly houses the AC adapter block and DC cable so that radiation noise from the DC cable is not amplified. The AC adapter unit 4 has an AC adapter 7 that includes an AC adapter block 52 and a DC cable 51, and a storage tray 6 that stores the AC adapter 7. The connector-side cable part 51b of the DC cable 51 is stored in the storage tray 6 on the left-side part 6D of the AC adapter block 52. The connector-side cable part 51b has a bundled part 51c with a figure-8 shape when seen from the top opening 6a side of the storage tray 6. The long axis of this bundled part 51c is parallel to the long axis of the AC adapter block 52. Because the DC cable 51 has a figure-8 shaped bundled part 51c, the part that runs parallel to electronic circuit boards inside the AC adapter block 52 is reduced and amplification of radiation noise is reduced.

In a circuit and a method for amplification of an electrical input signal, a signal splitter divides the input signal into a first partial signal in a first signal path and a second partial signal in a second signal path. The first signal path has a first amplification stage for amplification of the first partial signal and the second signal path has a second amplification stage for amplification of the second partial signal. Each of the two amplification stages is supplied with current by a current supply device. Both amplified partial signals are recombined into an output signal by a signal combination element downstream from the amplification stages. The first amplification stage and the second amplification stage are coupled with a regulation device that regulates the amplification of the first partial signal dependent on a current difference between a supply current requirement of the second amplification stage and a supply current requirement of the first amplification stage and which regulates the amplification of the second partial signal dependent on a current difference between the supply current requirement of the first amplification stage and the supply current requirement of the second amplification stage.

The invention provides a loudspeaker which comprises a basin stand, a vibration system and a magnetic circuit system, the vibration system and the magnetic circuit system are respectively fixed on thebasin stand, the vibration system comprises a vibrating diaphragm fixed on the basin stand and a voice coil driving the vibrating diaphragm to vibrate and produce sound, the vibrating diaphragm comprises a globe roof, and two ends of the globe roof along the vibration direction are provided with microporous structures. Compared with the prior art, the loudspeaker provided by the invention has theadvantages that the two ends of the globe roof along the vibration direction are arranged into the microporous structures, so that when the loudspeaker is assembled into the loudspeaker box, the airflow noise in the front cavity of the loudspeaker box can be effectively reduced, and the purposes of improving the performance and the tone quality are achieved.

The transmission power of a fill level radar is varied in that the transmission power is switched, by a signal switch, from a first transmission power to a second transmission power. This switching takes place, for example, by bypassing the high-frequency amplifier or by switching off a drain voltage.

Provided is a differential amplification device reduced in DC offset voltage. The amplification device amplifies an input signal, and includes a chopper switch circuit which switches the polarity of the input signal between a normal phase and a reverse phase and outputs the input signal, a V-I conversion circuit which is connected to the chopper switch circuit, a capacitance circuit which is connected to the V-I conversion circuit to store electric charges supplied from the V-I conversion circuit, and an amplification circuit which is connected to the V-I conversion circuit to switch the polarity of an input signal between the normal phase and the reverse phase and amplify the input signal.