41results about How to "Noise affecting" patented technology

A noise reduction device including a noise detection microphone including a high-frequency noise detection microphone and a low-frequency noise detection microphone for respectively detecting a high-frequency noise and a low-frequency noise generated from a noise source; a noise control unit for generating a control sound signal for cancelling a noise detected by the noise detection microphone in a control center of control space; and a loudspeaker for outputting a control sound based on the control sound signal from the noise controlling unit. The high-frequency noise microphone is disposed in a vicinity of a head portion of a user in a state in which directivity in an opposite direction with respect to the control center is added, and the low-frequency noise detection microphone is disposed outside of a sound-insulating wall.

A mass measurement apparatus with an excitation circuit is provided to forcibly excite a piezoelectric vibration reed. The excitation circuit comprises a PLL circuit including, a voltage controlled oscillation circuit outputting an excitation signal to the reed and a phase comparator via a distributor. The phase comparator outputs a signal corresponding to a phase difference between an output signal of the reed and the excitation signal. The signal is passed through a loop filter to be converted to a direct-current voltage and supplied to the oscillator as a control voltage. The oscillator has an oscillation frequency varying in according to the control voltage, outputs the excitation signal with no phase difference with respect to the output signal of the reed, and causes the reed to resonate. A signal processing unit counts the output frequency of the oscillator and calculates the resonance frequency of the reed.

Each of electronic control units is configured to control electronic components in a vehicle, and is provided with a plurality of first terminals classified into a plurality of groups each of which is associated with electronic components in one of sections in the vehicle. A board has a first face on which the electronic control units are mounted. First connectors are provided on a second face of the board. Each of the first connectors has second terminals each of which is electrically connected to one of the first terminals in one of the groups in each of the electronic control units, and is configured to be connected to a wire harness extended to one of the sections in the vehicle.

A method for estimating the distance (d) of a receiver (102) from a radio transmitter (101) includes the steps of: receiving (602) radio signals (103, 701) irradiated by the transmitter (101), which include components from which at least three tones (1,2,3,4) are extracted, each having a different frequency; measuring (606) a first phase difference (Δφ₂₁) between first two tones (1, 2) of the at least three tones, whose frequencies (f₁, f₂) have a first spacing, and measuring a second phase difference (Δφ₄₃) between second two tones (3, 4) of the at least three tones, whose frequencies (f₃, f₄) have a second spacing, wherein one of the first spacing or second spacing is greater than the other; estimating (607, 611, 613) the distance (d) on the basis of the first phase difference (Δφ₂₁) and the second phase difference (Δφ₄₃).

A circuit module is mounted with an IC that modulates and demodulates a multicarrier signal. The circuit module has a laminated board, which is provided internally with a plurality of conductive layers laminated having insulating layers in between, and an IC, which is provided with a plurality of ground terminals to be grounded. Of the plurality of conductive layers, a conductive layer provided proximate to the IC configures a ground layer electrically connected to the plurality of ground terminals.

A vascular endothelial reactivity measuring apparatus according to the present invention includes: a blood flow blocking section 2 for blocking blood flow through the arterial blood vessel of an organism; an evaluating section 4 for evaluating the geometric property of the arterial blood vessel or its wall; and a control section 3 for controlling the blood flow blocking section such that the blood flow through the arterial blood vessel is repeatedly blocked and unblocked in at least two iterative blocking/unblocking cycles. During at least a part of a period in which the blood flow through the arterial blood vessel is unblocked, the evaluating section 4 evaluates the geometric property and processes data, representing the geometric property during the partial period, in the iterative blocking/unblocking cycle.

An imaging device is provided at a lower manufacturing cost. In a light-receiving portion of an imaging device which includes the light-receiving portion, a first transistor connected to the light-receiving portion, and a peripheral circuit, a comb-like n-type semiconductor and a comb-like p-type semiconductor are arranged so as to engage with each other in a plan view. Further, the light-receiving portion and the first transistor overlap with each other. The peripheral circuit includes a second transistor and a third transistor. Further, the second transistor and the third transistor include semiconductor layers having different bandgaps. Further, one of the semiconductor layers of the second transistor and the third transistor has the same bandgap as a semiconductor layer of the first transistor.

The present invention refers to a method for magnetic resonance imaging or nuclear magnetic resonance spectroscopy comprising emitting a radio frequency and gradient pulse sequence towards an object being subjected to a magnetic field, wherein said object comprises a molecule having an atom with a nuclear spin differing from 0, encoding, detecting and acquiring a magnetic resonance signal from said object corresponding to said emitted radio frequency and gradient pulse sequence, wherein the radio frequency and gradient pulse sequence comprises a first weighting block, a mixing block with duration t_m and a second weighting block, and wherein encoding, detecting and acquiring the magnetic resonance signal from said object is limited to initial decay of the signal intensity I with increasing strength of at least one of the first weighting block and the second weighting block, wherein the variation of the initial signal decay rate with t_m is analysed to obtain the apparent exchange rate AXR.

A rod-shaped magnet is mounted on a rotating unit. The rod-shaped magnet has end surfaces which are oriented in a rotating direction and are magnetized to different magnetic poles. An angle detecting unit including magnetoresistive elements is disposed so as to be offset in a radial direction of a revolution path of the magnet from the revolution path and is configured to detect a change in angle of rotation of the rotating unit by detecting a leakage magnetic field in the vicinity of a side surface of the magnet. Two position detecting units each include magnetoresistive elements and are configured to detect a change in orientation of a magnetic field in the direction of a tangent to the revolution path when facing the rod-shaped magnet and produce a switch output.

A video system includes a video source transmitting an output signal on a transmission line. The output signal has a format such that first portions of the output signal include active video signals and second portions of the output signal lack active video signals. Each of a plurality of video receivers displays images based upon the active video signals and transmits a respective data signal on a respective one of a plurality of ports. A distribution device is electrically connected to the transmission line and to each of the ports. The distribution device transmits each of the data signals to the video source on the transmission line only during time periods when the second portions of the output signal are being transmitted on the transmission line. The distribution device includes a plurality of amplifiers, each having an input and an output. Each of the amplifiers receives signals on the input for transmission on the output as amplified signals. Each amplifier blocks signals received on the output from being transmitted on the input. Each amplifier transmits a respective amplified signal to a respective one of the receivers on a respective one of the ports. Each of the amplified signals is dependent upon the output signal and upon a data signal transmitted on the transmission line from the receivers other than the respective receiver.

A commutator for an electrical machine, which has a plurality of laminations that have contact faces and are separated from one another by slots in which, in the laminations, at least one groove is provided in the contact face, which groove extends essentially in the longitudinal direction of the respective lamination. As a result, the frequency with which the brushes are excited by the commutator can be increased, which has a favorable effect on noise.

A liquid ejecting apparatus includes an ejecting unit that includes a piezoelectric element which is displaced by a first drive signal or a second drive signal; a first unit circuit that generates the first drive signal by using a first pair of transistors; a second unit circuit that generates the second drive signal by using a second pair of transistors; and an adjustment unit that delays at least one of a first control signal and a second control signal to supply the delayed control signal to a corresponding unit circuit, in a case where timing when a level of the first control signal for controlling the first pair of transistors changes and timing when a level of the second control signal for controlling the second pair of transistors changes are within a threshold time, and in a case where a predetermined condition is satisfied.