Virtual auditory aperture passability

Auditory Perception and Virtual Environments

Chapter 4 Virtual Auditory Displays

Applications of Virtual Auditory Displays

Current technology makes it possible to simulate naturally-occurring spatial auditory cues quite accurately. However, the cost of such a system is not justifiable, or even desirable, for all applications. This paper surveys some of the applications currently using virtual auditory displays and some of the issues important in the design of virtual auditory displays. Keywords—virtual environments...

Angle-invariant imaging using a total internal reflection virtual aperture.

Conventional lens stops, implemented with an absorptive physical aperture, have an angle-dependent projection that introduces field dependent loss and reduces diffraction-limited resolution. Retro-telephoto lenses obtain uniform response using aberration vignetting, but this results in low wide-angle resolution and significant lens volume. However, an angle-independent "virtual" aperture can be...

High-numerical-aperture-based virtual point detectors for photoacoustic tomography.

The focal point of a high-numerical-aperture (NA) ultrasonic transducer can be used as a virtual point detector. This virtual point detector detects omnidirectionally over a wide acceptance angle. It also combines a large active transducer surface and a small effective virtual detector size. Thus the sensitivity is high compared with that of a real point detector, and the aperture effect is sma...