Top PDF Method and apparatus for bone sensing

Method and apparatus for bone sensing

Method and apparatus for bone sensing

Method and apparatus for bone sensing Abstract The invention discloses an improved bone conduction sensor capable of use within a voice sound transmitting apparatus. The bone conduction sensor is adapted for placement in the external auditory canal of the user in a nonocclusive fashion. The bone conduction sensor has a contoured surface adapted-to fit against a wall of the external auditory canal increasing the surface area contact between the bone conduction sensor and the wall of the external auditory canal. The bone conduction sensor may also be associated with one or more contact sensors adjacent the bone conduction sensor for determining contact between the bone conduction sensor and the wall of the external auditory canal. In addition, the invention provides for the bone sensing element to be separated from the circuit portion of the bone conduction sensor so that the circuitry may be removed to the behind the ear portion of the earpiece.
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PREDICTIVE SENSOR METHOD AND APPARATUS

PREDICTIVE SENSOR METHOD AND APPARATUS

sensor method and apparatus was developed to obtain the fastest possible response time while taking advantage of the slow sensor's more desireable characteristics.. sensors, 2) process t[r]

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Apparatus and method for on line barkhausen measurement

Apparatus and method for on line barkhausen measurement

Apparatus and method for on-line barkhausen measurement Abstract Apparatus and method for measuring the Barkhausen signal of a moving magnetic film, ribbon or fiber wherein first and second stationary electromagnet coils are arranged and separated by a distance, d, along the path of movement of the film, ribbon or fiber. The first and second coils are energized in a manner to generate first and second opposing DC magnetic fields through which the moving film, ribbon or fiber passes along its path of movement. As the film, ribbon or fiber moves through the first and second opposing magnetic fields at a velocity, v, it experiences one complete cycle of magnetization in a period of time equal to d/v. A stationary third signal pick-up coil is disposed between the first and second coils to detect the Barkhausen signal from the moving film, ribbon or fiber. The pick-up coil typically is disposed midway between the first and second coils where the Barkhausen signal will be approximately maximum.
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Apparatus and method for driving an ultrasonic transducer

Apparatus and method for driving an ultrasonic transducer

Apparatus and method for driving an ultrasonic transducer Abstract A method and apparatus for electronically driving an ultrasonic acoustic transducer. The transducer is operable in two modes; in a first mode, the lock-in frequency of the transducer is determined; in a second mode, the lock-in frequency determined in the first mode is used to modulate a tone-burst pulse to drive the transducer in an efficient manner. Operating in the first mode, the lock-in frequency is determined by exciting the transducer with a series of tone bursts, where each tone burst comprises an electronic pulse modulated by a tone of one frequency selected from a range of frequencies, and measuring the response of the transducer to each tone burst. In an alternative embodiment, the excitation of the transducer in the first mode is provided by a signal whose frequency is swept over a range. The response of the transducer is sampled at various times during the sweep. The lock-in frequency is chosen by examining the responses and choosing the frequency which gives the best response. Operating in the second mode, the transducer is driven with an electronic tone burst generated by modulating said an electronic pulse with a tone of the determined lock-in frequency.
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Method and apparatus for measuring electrical conductivity

Method and apparatus for measuring electrical conductivity

[0006]Hence, there is a need for a system and/or method and/or apparatus for accurately measuring electrical conductivity that addresses or at least ameliorates the aforementioned problems. In particular, such a system, method and/or apparatus is required for measuring electrical conductivity in materials having a low electrical conductivity. [0007]In this specification, the terms "comprises", "comprising" or similar terms are intended to mean a non-exclusive inclusion, such that a method, system or apparatus that comprises a list of elements does not include those elements solely, but may well include other elements not listed.
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Apparatus and method for transient thermal infrared spectrometry

Apparatus and method for transient thermal infrared spectrometry

Apparatus and method for transient thermal infrared spectrometry Abstract A method and apparatus for enabling analysis of a material (16, 42) by applying a cooling medium (20, 54) to cool a thin surface layer portion of the material and to transiently generate a temperature differential between the thin surface layer portion and the lower portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material.

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Apparatus and method for transient thermal infrared emission spectrometry

Apparatus and method for transient thermal infrared emission spectrometry

A method and apparatus for enabling analysis of a solid material (16, 42) by applying energy from an energy source (20, 70) top a surface region of the solid material sufficient to cause[r]

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Simulation Vacuum Preloading Method by Tri Axial Apparatus

Simulation Vacuum Preloading Method by Tri Axial Apparatus

It is very important to control any risk of instability of embankment during vacuum construction, the simulation vacuum preloading method using tri-axial apparatus is proposed to predict the behavior of soft soil improvement in the labora- tory, as well as to make this method become familiar and easier in the future. The tri-axial apparatus is used instead of the large-scale one, which has been performed by Bergado (1998) and Indaratna (2008). The tri-axial test on small size specimen can be carried out in one week compared to the large-scale apparatus takes one month for big specimen. In addition, the lateral deformation as well as the shear strength increase with time can determine accurately.
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Apparatus and method for reducing anhydrous ammonia application by optimizing distribution

Apparatus and method for reducing anhydrous ammonia application by optimizing distribution

Apparatus and method for reducing anhydrous ammonia application by optimizing distribution Abstract An apparatus, method, and system for distributing gas and/or liquid phase substance from an inlet to multiple outlets with reduced variations and distribution. The apparatus includes a body having an inlet and a plurality of outlets. In one aspect, a rotatable impeller is positioned between inlet and plurality of outlets. The impeller includes a spiral fluid pathway relative to direction of substance through the inlet so that the substance passes through the impeller and is distributed to the outlets through a spinning impeller.
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Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials

Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials

Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials Abstract A method and apparatus for enabling analysis of a flowable material enclosed in a transport system having an infrared transparent wall portion. A temperature differential is transiently generated between a thin surface layer portion of the material and a lower or deeper portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material, and the altered thermal infrared emission spectrum is detected through the infrared transparent portion of the transport system while the altered thermal infrared emission spectrum is sufficiently free of self- absorption by the material of emitted infrared radiation. The detection is effected prior to the temperature differential propagating into the lower or deeper portion of the material to an extent such that the altered thermal infrared emission spectrum is no longer sufficiently free of self-absorption by the material of emitted infrared radiation. By such detection, the detected altered thermal infrared emission spectrum is indicative of characteristics relating to molecular composition of the material.
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Standard Test Method for Leaching Solid Material in a Column Apparatus 1

Standard Test Method for Leaching Solid Material in a Column Apparatus 1

5.1.5 Tubing used in the apparatus shall be of inert materi- als, for example, glass, stainless steel, polytetrafluoroethylene lined. The outer diameter shall be 6 mm ( 1 ⁄ 4 in.). 5.1.6 Substitution of materials of construction of the column or any of its parts is acceptable, as long as it is demonstrated that levels of contamination for analyte(s) of interest are equal to or less than those specified. Any modification of the apparatus as described in this test method must be justified, documented, and delineated in the report.

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METHOD AND APPARATUS FOR FABRICATING

METHOD AND APPARATUS FOR FABRICATING

In even another aspect, the present invention includes a laminated composite body including a layer of metal foil strips having a plurality of gaps spacing apart adjacent strips in the l[r]

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METHOD AND APPARATUS FOR NOP FOLDING

METHOD AND APPARATUS FOR NOP FOLDING

20 allocated. Instead, "folded" information regarding unexecuted NOP instructions is forwarded to the ROB 1 12 via folding logic 116. In this manner in-order NOP retirement is ac[r]

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METHOD AND APPARATUS FOR COORDINATING A CHANGE IN

METHOD AND APPARATUS FOR COORDINATING A CHANGE IN

(GUI) and includes a service provider manager function or module that enables the user to switch between service providers (e.g., associated with networks 151, 152). The service provider[r]

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METHOD AND APPARATUS FOR OPTICAL FIBER SPLICING

METHOD AND APPARATUS FOR OPTICAL FIBER SPLICING

providing an optical fiber splicing method comprising a step of sliding terminal portions of optical fibers to be spliced along a groove of V-shaped cross-section in mutually opposite di[r]

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Method and Apparatus for Powered Descent Guidance

Method and Apparatus for Powered Descent Guidance

45 In this section we describe the main algorithm for the solution of the minimum landing error powered descent prob- lem (Problem 3). The key idea is to perform a prioritized optimiz[r]

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Method and apparatus for measuring electrical conductivity

Method and apparatus for measuring electrical conductivity

The provision of the additional transformer core 14 in the apparatus of the present invention not only enables the measurement of conductivity in low conductivity mate[r]

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Modular Apparatus and Method for Attaching Multiple Devices

Modular Apparatus and Method for Attaching Multiple Devices

Depending on the configuration and placement of voltage terminals VA,, contact cavity 115, and pressure reference cavity 120, modular apparatus 100 may accept a different type of pres[r]

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Method and Apparatus for Pressure Pulse Arcjet Starting

Method and Apparatus for Pressure Pulse Arcjet Starting

a second gas generator serially connected to said second valve and parallel to said first gas generator for pro- cessing said cyclically controlled propellant flow thereby p[r]

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Method and apparatus for pressure pulse arcjet starting

Method and apparatus for pressure pulse arcjet starting

closing said first valve and opening said second valve, thereby filling said accumulator with propellant from closing said second valve and opening said first valve[r]

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