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7523649 |
Method and apparatus for ultrasonic determination of hematocrit and hemoglobin concentrations
An ultrasonic field-portable system for accurately measuring hematocrit (HCT) and hemoglobin concentration (HGB) in small food samples. The system includes an analyzer ( 10 ) that allows extremely...
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7415365 |
Structure-borne sound sensor unit
A structure-borne sound sensor unit, in particular for an agricultural machine, includes a signal converter, which converts a mechanical sensor signal into an electrical sensor signal, and...
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7328131 |
Implantable pedometer
An implantable pedometer for measuring the amount of joint use is disclosed. The implantable pedometer includes a sensor adapted for detecting indicators of joint usage. A counter is configured for...
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7315244 |
Excessive noise level alerting device
A sound-detection and alerting system (SDAS) is designed for use in hospitals, offices, or other environments where excessive noise levels are of concern. The SDAS depends on several variables to...
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7270006 |
Single button operating sound level meter and method therefor
A sound level monitor device has a microphone. A sound level measurement circuit is coupled to the microphone. The sound level measurement circuit takes sound signals monitored by the microphone...
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7026943 |
Acoustic wave ice and water detector
An acoustic wave sensor utilizes one or more acoustic waves trapped in an acoustic wave cavity to detect the presence of one or more substances on a surface of the acoustic wave cavity. To detect...
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6988411 |
Fluid parameter measurement for industrial sensing applications using acoustic pressures
In industrial sensing applications at least one parameter of at least one fluid in a pipe 12 is measured using a spatial array of acoustic pressure sensors 14,16,18 placed at predetermined...
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6968740 |
Systems and methods for determining an acoustic and/or thermal characteristic of a target material
A system and method for determining an acoustic and/or thermal characteristic of a target material are provided. The system includes an acoustic source arranged to direct a sound wave at a target...
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6878237 |
Machine and process for operating a machine to monitor vibrations
Machine and process for operating machine having at least one roll and an opposing surface arranged to form at least one nip. The machine includes at least one roll and an opposing surface arranged...
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6857312 |
Systems and methods for sensing an acoustic signal using microelectromechanical systems technology
An acoustic system has an acoustic sensor and a processing circuit. The acoustic sensor includes a base, a microphone having a microphone diaphragm supported by the base, and a hot-wire anemometer...
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6789518 |
Method and system for identifying valve clearances and position of valve opening cams
In a method and system, the condition of a valve drive, particularly of valve clearance, and the position of at least one valve opening cam of a cam shaft of an internal combustion engine are...
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6786633 |
Method and arrangement for acoustically determining a fluid temperature
In a method and an arrangement for acoustic determination of an instantaneous fluid temperature, acoustic velocity V in a fluid is monitored and an output signal related to the acoustic velocity is...
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6752018 |
Method and apparatus for characterizing an acoustic impedance
In one embodiment of the present invention, an apparatus for characterizing an acoustic impedance of an engineering component acoustically coupled to an acoustic waveguide includes: a pressure...
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6584848 |
Non-destructive evaluation method employing dielectric electrostatic ultrasonic transducers
An acoustic nonlinearity parameter (β) measurement method and system for Non-Destructive Evaluation (NDE) of materials and structural members novelly employs a loosely mounted dielectric...
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6443010 |
Audible air flow detector for air filters
An apparatus for detecting blockage of a porous medium of an air filter utilized to filter air within a forced air stream contained within an enclosure. The air filter extends in a direction...
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6343513 |
Non-destructive evaluation method and apparatus for measuring acoustic material nonlinearity
An acoustic non-linearity parameter (β) measurement method and system for Non-Destructive Evaluation (NDE) of materials and structural members obviates the need for electronic calibration of the...
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6311156 |
Apparatus for determining aerodynamic wind of utterance
The present invention relates to the detection, analysis, and recognition of speech and is especially concerned with systems utilizing speech air flow, and, particularly concerned with positioning...
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6098463 |
Method and apparatus for measurement of wide dynamic range signals
A method and apparatus for measurement of wide dynamic range signals is provided. The method and apparatus is particularly suited to measurement of physical parameters over a wide dynamic range and...
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6094987 |
Method and apparatus for ultrasonic wave measurement
First and second ultrasonic sensors 1A and 2A are arranged facing each other, and these ultrasonic sensors 1A and 2A are provided with first and second reflectors 1 and 2 on their surface,...
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6029522 |
Ultrasonic apparatus for characterizing wooden members
Ultrasonic techniques are applied to the measurement of wooden members to identify localized anomalies internal to the wooden members substantially smaller than the full width of the ultrasonic...
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5804698 |
Method and system for measuring fluid parameters by ultrasonic methods
A system for measuring fluid parameters of one or more liquids by an ultrasonic method comprises a voltage controlled oscillator; an ultrasonic resonator comprising one or more resonator cells,...
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5713540 |
Method and apparatus for detecting railway activity
A highly reliable early warning system that can provide efficient detection of railway activity and early warning of dangerous railway conditions to train operators and to central dispatch control...
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5656428 |
Homogeneous bioassay using acoustic emission spectroscopy
A system and method for homogeneous bioassay uses acoustic energy emissions. A measurement cell is designed for binding reactions of mobile biorecognition molecules. The binding reaction contained...
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5533402 |
Method and apparatus for measuring acoustic parameters in liquids using cylindrical ultrasonic standing waves
Methods and apparatus are disclosed for analyzing liquids utilizing cylindrical acoustic standing waves, generally in the ultrasonic region. The invention facilitates measurement of acoustic...
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5478756 |
Chemical sensor for detecting binding reactions
A chemical sensor includes a piezoelectric support (1) capable of supporting a shear horizontal wave provided on its surface with an electrode (2,3). The sensor is characterized in that the surface...
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5420581 |
Maternal sound level device and method for protecting fetal hearing
The present invention is a maternal sound level device that functions to protect fetal hearing by alerting the mother whenever her fetus is exposed to sound pressure levels (SPL) which exceed...
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5374521 |
Acoustic reflection process for molecular sensing using a bulk acoustic wave quartz sensor
A passive process for selectively sensing analyte molecules in a fluid by reflection of acoustic waves from a sensing surface of a bulk accoustive wave quartz sensing device to which analyte...
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5347496 |
Method and system of mapping acoustic near field
A method and system for mapping the acoustic near field of a stationary al symmetric structure are provided. The structure is subjected to a rotating excitation energy profile from a plurality of...
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5337610 |
Method of determining load in anisotropic non-crystalline materials using energy flux deviation
An ultrasonic wave is applied to an anisotropic sample material in an initial direction and the intensity of the ultrasonic wave is measured on an opposite surface of the sample material by two...
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5305641 |
Method for evaluation of acoustic anisotropy and measuring apparatus therefor
Increasing use of thermo-mechanically treated high strength steels in construction projects has created a need for on-site inspection of welded joints by ultrasonic techniques. However, such steels...
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5097512 |
Transducer testing
A phased array of transducers is placed in contact with a block (15) of sound absorbent material surrounded by a housing (12) in such a manner that the block and housing together define an...
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4811605 |
Apparatus and method for inspecting the degradation of a gas nozzle
The present disclosure describes an apparatus and a method for inspecting the degradation of a gas nozzle. The nozzle is of the type that can produce a whistle when a gas is blown through the...
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4577503 |
Method and device for detecting a specific acoustic spectral feature
A method and device for detecting a narrow acoustic spectral feature in a sample as described. The method uses an electrical frequency modulated (FM) signal that is obtained from a voltage...
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4501150 |
Acoustic polarimeter
An acoustic polarimeter is provided for measuring the acoustic birefringence of a plate with parallel faces. The plate to be measured is fixed to one face of an acoustically isotropic body and to...
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4397187 |
Chamber for tesing acoustical transmission loss characteristics of sheet materials
Acoustical transmission loss of sheet materials in the low frequency range is measured by utilizing a cylindrical test chamber containing a speaker directed towards the upper end to which the sheet...
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4280183 |
Gas analyzer
A gas analyzer for instantaneously testing the percentages of the components of a binary gas mixture comprising carbon dioxide and oxygen, or a ternary one also containing saturated steam, which is...
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4138894 |
Transversal acoustic wave operating device
The device comprises an elongated acoustic wave translating isotropic body and a pair of transducers applied over one of the two parallel end faces thereof. Said transducers are arranged with...
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4124895 |
Acoustic measuring system
A remote terminal for use in an acoustic measuring system comprises a measuring device including an input terminal supplied with an analog signal to be measured, an A/D converter for converting the...
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4121290 |
Analog sound velocity calculator
An analog apparatus for determining the velocity of sound at a selected position in a liquid media is provided with a means for representing the conductivity, temperature, and depth of the position...
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4118782 |
Digital sound velocity calculator
A digital apparatus for determining the velocity of sound at a selected position in a liquid media is provided with a means for representing the conductivity, temperature and depth of the position...
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4080837 |
Sonic measurement of flow rate and water content of oil-water streams
A method and apparatus for metering water content in an oil-water system by measuring sonic velocity in a flowing oil-water mixture, thereafter to determine flow rate to provide individual oil and...
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4067225 |
Capacitance type non-contact displacement and vibration measuring device and method of maintaining calibration
A new capacitance type non-contact displacement and/or vibration measurement instrument sensing head is described together with a novel method of maintaining calibration of the instrument using...
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4015470 |
Flow measuring method and apparatus
Selected variables of a fluid flowing through a conduit are measured by transmitting acoustic pulses through the conduit wall and fluid stream along normal and oblique transmission paths between...
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4009707 |
Automatic acoustic impedance meter
In an acoustic impedance meter used for evaluating the performance of the middle ear and tympanic membrane system; a sound source is coupled to the ear canal by means of an ear probe and a sound...
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3789952 |
NOISE DOSIMETER
A noise dosimeter having noise pick-up means for generating an analog signal in correspondence to picked-up noise, signal processing means for generating pulses in correspondence to the analog...
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3778552 |
PERSONAL SOUND MONITOR
A personal sound monitor wherein the sound is detected by a microphone and converted to a related electrical signal. The level of the signal is used to gate one of the plurality of levels in a...
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3407897 |
Device for rendering visible acoustic vibrations
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3280937 |
Apparatus for measuring the frequency of acoustical energy
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3273111 |
Apparatus for measuring the velocity of acoustical waves
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2982942 |
Directional sound detection
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