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Showing 1 to 6 of 6 for “"mechanical amplification"”.
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Hair Bundles of a Jawless Vertebrate Employ Tetrapod-Like Tuned Mechanical Amplification
… and balance organs of tetrapod vertebrates, mechanical signals are transduced by an elegant organelle called the hair bundle. Deflections of this structure apply forces to mechanically gated ion channels. Hair bundles are not passive receivers of stimuli, but are instead active participants …
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Harmonic poly-actuator : design and control of a new piezoelectric mechanism
… must be amplified, typically through mechanical or frequency leveraging. Both have inherent limitations: mechanical devices can increase the stroke but is naturally limited; and frequency devices relies on friction and is limited to nanopositioning. In this thesis, we investigate …
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Developement of Piezo-Hydraulic Actuation Systems Technology for use on a Helicopter Trailing Edge Flap
… the required displacement for this device. The amplification is accomplished in two stages. The first stage, mechanical amplification, uses differential length lever arms to increase the piezoelectric actuator output. The second stage, hydraulic amplification, is coupled to the first stage and …
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Development of Active Artificial Hair Cell Sensors
The cochlea is known to exhibit a nonlinear, mechanical amplification which allows the ear to detect faint sounds, improves frequency discrimination, and broadens the range of sound pressure levels that can be detected. In this work, active artificial hair cells (AHC) are proposed and developed …
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Frequency specificity of contralateral, ipsilateral and bilateral medial olivocochlear acoustic reflexes in humans
… indicates that the brain controls the gain of mechanical amplification in the cochlea in a frequency specific manner through the medial olivocochlear (MOC) efferent pathway, but the degree of MOC frequency specificity in humans is poorly understood. This thesis investigates the tuning …
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Tuning of the Active Hair Bundle
… and kinesthetic signals. Each hair cell detects mechanical disturbances by means of its hair bundle, a motile organelle consisting of actin-filled, villous projections (called stereocilia) endowed with assemblies (called adaptation motors) of mechano-sensitive ion channels and myosin molecules …