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Noise Canceling Headsets for Speech Communication
Published in Gillian M. Davis, Noise Reduction in Speech Applications, 2018
Lars Håkansson, Sven Johansson, Mattias Dahl, Per Sjösten, Ingvar Claesson
A communication headset usually consists of a pair of headphones and a microphone attached with an adjustable boom. Headphone design varies considerably between different manufacturers and models. In its simplest form, the headphone has an open construction providing little or no attenuation of the environmental noise. In headsets designed for noisy environments, the headphones are mounted in ear cups with cushions that provide some attenuation.
Tools and Technologies for Blind and Visually Impaired Navigation Support: A Review
Published in IETE Technical Review, 2022
Bineeth Kuriakose, Raju Shrestha, Frode Eika Sandnes
Audio feedback is usually given in a navigation system using earphones or speakers. The disadvantage of audio feedback is the disturbance caused to the user when the information is over-flooded or it may also annoying when the user misses the environment sounds due to the auditory cues [32]. Bone conduction headphones are used in many navigation systems to minimize this issue to an extent. The headset allows the conduction of sound to the inner ear allowing the user to perceive the audio signal without blocking the ear canal [33].
Device profile of the XVision-spine (XVS) augmented-reality surgical navigation system: overview of its safety and efficacy
Published in Expert Review of Medical Devices, 2021
Christopher F. Dibble, Camilo A. Molina
The headsets are cleanable with common products used to wipe down OR equipment and do not have special storage needs. Registration clamps are used and can provide a navigation range of up to eight vertebral segments, which is greater than currently recommended for robotic navigated surgery [3,20]. The translucent retinal lenses display 2D and 3D navigational data on the surgical field. For spine surgeons, the 2D data provide sagittal and axial projections of the trajectory of the tool being tracked (Figure 2). The 3D data are a segmentation of the bony spine anatomy, overlaid on the physical spine in an anatomically identical way, matching orientation, location, and size (Figure 3). Surgical workflow involves attaching a registration clamp with a registration marker to fixed bony anatomy such as a spinous process or the posterior superior iliac spine, obtaining a CT scan, and then transferring the data to the XVS console where it is processed for automatic 3D segmentation. The registration markers are then exchanged for navigation markers. At this point, the headset is donned and registration accuracy is checked by comparing AR to known landmarks. This is easier in the case of open procedures, but also can be done in minimally invasive ones, with skin and bone on the tip of the instruments. It should be noted that performing a low-dose pre- or intra-operative CT scan is required for current neuronavigation technology and this does not expose the patient to increased radiation for the procedure. A number of CT scan devices are used commercially, all of which are compatible with the XVS system. The registration works by taking fixed fiducials within the acquired imaging when the CT or 3D fluoro image is performed and using that data to triangulate the position of the tracked instruments and reference frame. That data exists in raw standard DICOM imaging and is agnostic to the type of CT acquisition platform.