Some new therapies for tinnitus employ bone-conducted sound in the high audio and ultrasonic frequencies, but there has been little previous research on sound transmission through the head at these frequencies. The vibrational characteristics of two dry skulls, in comparison to a live human head, were measured in the 2- to 52-kHz range. White noise was played and received through piezoelectric ...

Human listeners can perceive speech signals from a voicemodulated ultrasonic carrier which is presented through a boneconduction stimulator, even if they are sensorineural hearing loss patients. As an application of this phenomenon, we have been developing a bone-conducted ultrasonic hearing aid (BCUHA). This research examined whether formant space and F0 can be cues of speaker discrimination i...

Ocular vestibular evoked myogenic potentials (oVEMPs) are a recently described clinical measure of the vestibulo-ocular reflex. Studies demonstrating differences in frequency tuning between air-conducted and bone-conducted (BC) oVEMPs suggest a separate vestibular (otolith) origin for each stimulus modality. In this study, 10 healthy subjects were stimulated with BC stimuli using a hand-held mi...

Virtual and augmented reality applications provide us with increasingly compelling multisensory worlds. Although spatial sound technologies are often used in such applications, headphone based sound reproduction may result in an undesired ‘‘mediation awareness’’ for an enduser. An alternative can be provided by bone-conducted sound technologies, traditionally used in hearing aids applications. ...

Human listeners can perceive speech signals from a voice-modulated ultrasonic carrier which is presented through a bone-conduction stimulator (bone-conducted ultrasound, BCU), even if they are sensorineural hearing loss patients. As an application of this phenomenon, we have been developing a bone-conducted ultrasonic hearing aid (BCUHA). The performance of BCUHA has been evaluated considering ...

A finite element-based bone remodeling study in human was conducted in the lumbar spine. This was done to examine the validity of the bone remodeling algorithm by comparing to experimental data. A non-linear 3-D finite element model of the normal ligamentous lumbar spine of L3 to L5 was generated. Two different material configurations were assigned to the finite element model. Two analyses with...

Bone has a capability to repair itself when it is fractured. Repair involves the generation of intermediatetissues, such as fibrous connective tissue, cartilage and woven bone, before final bone healing can occur. Theprocess of cartilage-to-bone transition (CBT) is a key for the achievement of rigid bone healing duringfracture repair. We tested this potential for elastic cartilage using a long ...

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