منابع مشابه
Measurement of bone conduction levels for high frequencies.
For assessment of safety, it is necessary to measure the maximum possible force exerted by a bone conduction device coupled to the human head. Calibration of bone conduction hearing aids and vibrators in the audiometric range is based on measurement of acceleration and force using an artificial mastoid. Extending the measurement to the high audio range was accomplished using a live head. To ass...
متن کاملAutomated Measurement of Complex Permeability and Permittivity at High Frequencies
The paper reports here on the reflection frequency-domain measurements to determine the selected electromagnetic properties of materials using an Agilent 8714ET Network analyzer. The measurement process as well as results evaluation are performed by means of computer control. For this purpose, a VEE program (Agilent technology) has been developed. The discussion concerning the optimisation of m...
متن کاملSmall Antennas for High Frequencies
When an alternating electric current flows through a conductor (wire), Electric-E and Magnetic-H fields are created around the conductor. If the length of the conductor is very short compared to a wavelength (<< λ/4), the electric and magnetic fields will decrease dramatically within a distance of one or two wavelengths. However, as the conductor is lengthened, the intensity of the fields...
متن کاملCharacterization of DPOAE fine structure
The distortion product otoacoustic emission (DPOAE) fine structure is revealed, when measuring DPOAE with a very fine frequency resolution. It is characterized by consistent maxima and minima with notches of up to 20 dB depth. The fine structure is known also from absolute hearing thresholds, and has recently been demonstrated to exist in low level equal-loudness contours. The character of the ...
متن کاملLabview - based GUI for DPOAE Signal Estimation
A Labview-based Graphical User Interface (GUI) implementation of a technique of estimation of distortion product otoacoustic emissions (DPOAEs) is presented. The purpose of this work is to make the estimation method available to all users, independent of their level of expertise in signal processing. The basis of the work is a nonlinear adaptive algorithm developed by Dr. A. K. Ziarani. Three u...
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ژورنال
عنوان ژورنال: AUDIOLOGY JAPAN
سال: 1994
ISSN: 1883-7301,0303-8106
DOI: 10.4295/audiology.37.547