Constant-current (CC) power supplies find applications in many fields. The Resonant immittance converters (RICs) convert a voltage source to the current source, thereby render them suitable for its application as a CC power supply. A fourthorder RIC topology, TT44 , is studied in this paper. Detailed steadystate analysis is presented. Procedure to perform converter optimization that leads to cl...

Ear canal measurements of acoustic immittance (a term that groups impedance and its inverse, admittance) and the related quantities of acoustic reflectance and power absorbance have been used to assess auditory function and aid in the differential diagnosis of conductive hearing loss for over 50 years. The change in such quantities after stimulation of the acoustic reflex also has been used in ...

Linear passive vibration absorbers, such as tuned mass dampers, often contain springs, dampers and masses, although recently there has been a growing trend to employ or supplement the mass elements with inerters. When considering possible configurations with these elements broadly, two approaches are normally used: one structure-based and one immittance-based. Both approaches have their advanta...

INTRODUCTION  Old age is associated with changes in the characteristics of the middle ear transmission system and in external ear resonance, and these carry implications for the hearing aid (HA) verification process for which targets and measures of the real ear insertion gain (REIG) are used. AIM  To compare the real ear unaided gain (REUG) and the equivalent volumes of the external ear (Veq...

The purpose of this investigation was to describe, in a longitudinal prospective study, the acoustic-immittance profile during sessions with effusion and during sessions without effusion in children with recurrent middle-ear effusion (MEE). The static-acoustic middle-ear admittance, tympanometric width (TW), tympanometric peak pressure (TPP), and ipsilateral acoustic reflex (IAR) were evaluated...

The paper proposes a new stability test for two-dimensional (2D) discrete systems. It is a tabular test; that is, it builds for the tested bivariate polynomial of degree (n1, n2) a sequence of n2 (or n1) bivariate polynomials or matrices (the “2D table”) of increasing row and decreasing column sizes. It is an immittance-type test, which means that it uses a three-term recurrence relation to obt...

Two configurations for realizing higher-order series and parallel immittance functions using current conveyors are presented. The proposed circuits require only grounded resistors and capacitors. As examples of their applications, highpass and bandpass filters are given with simulation results.