A method for the simulation of the acoustical quality produced by a virtual sound source and for the localizing of this source with respect to one or more listeners, and one or more original sound sources. This method consists in: 1) fixing values of perceptual parameters defining the acoustical quality to be simulated and values of parameters defining the localization of a virtual source, 2) converting these values into a pulse response described by its energy distribution as a function of the ...

Methods, apparatus and computer program products adjust display attributes of hierarchically arranged objects to simulate the user navigating through the objects in three dimensions. Objects in the same level of the hierarchy are displayed in a size different from objects on other levels of the hierarchy to simulate the objects on each level being on a different plane, one behind another. Each object's child objects are displayed clustered around the projection of the object into the plane of th...

A method and apparatus for simulating movement within a multidimensional space by sampling a prestored panoramic image. The image formed by sampling is displayed on a CRT display screen. Each of the stored images represents the view derived from data stored as a panoramic projection of a flat world in an imaginary space, selected as a function of an observer's position within the imaginary space and orientation with respect to that space. The preferred embodiment selects prestored panoramic imag...

In a thermal-environment sensor which detects thermal conditions in an indoor environment based on the surface temperature of a heating element supplied with a thermal quantity, the spectral emissivity of the outer surface of said heating element closely conforming to the spectral emissivity of the surface of the human skin or clothes thereon so as to bring the radiant heat transfer coefficient of the sensor remarkably near that of the human body.

Device to simulate the flow of a fluid for calibrating a laser velocimetric device. This device, able to simulate the flow of a fluid in order to calibrate a laser beam velocimetric chain, comprises a mobile element (8) for simulating the flow of a fluid intercepting at least one laser beam (34, 40) of the velocimetric chain, means (16) for moving the mobile element (8), and means (24) for controlling the movement means (16) so as to apply to the simulation element (8) a movement with a speed va...

A doll having body portion(s) indicative of the structural features of a dicotyledonous seed is disclosed. The doll has a head wherein the structural features of the head duplicates the structural features of a dicotyledonous seed. Moreover, the head contains indicia indicative of the coloring and coloring patterns of the seed emulated. Structural features of the seed such as the raphe, the strophiole, and the hilum are used to form various facial features such as the nose and mouth. Eyes are ad...

Apparatus for simulating aerodynamic heating and cooling on the outer surface of equipment externally mounted on an aircraft or missile as if airborne and exposed to an air stream. A first proximately spaced enclosure substantially uniformly conforms to the outer surface of the equipment and defines a low pressure chamber. A second enclosure envelops the first enclosure and defines a high pressure chamber. An adjustable flow producing mechanism directs flow of pressurized inlet air into the high...

A system to simulate motion and plasma induced variations in the attenuation of signals transmitted from reentry vehicles uses a controlled attenuator which is programmed to vary the output power of a test transmitter in a way which simulates the variation which would be observed in actual flight. The simulator can be programmed by either an analog wave shaper or a digital driver to control the attenuation characteristics of a voltage control attenuator thus producing signal variations equivalen...

Movement through multi-dimensional space is simulated using a series of panoramic images which are projected or displayed in sequence. The user's direction of view, that is the selected view window, is maintained as the series of images is projected or displayed. Motion in directions other than forward or reverse is simulated by utilizing "branch" points in the sequence. Each path from a branch point simulates motion in a different direction. Branch points are generally indicated to a viewer by ...

An air conditioner which discharges an air flow to a room is operated to provide the room with the environmental characteristics of a selected region of the world by varying the air direction, air speed, air fragrance, and background noise to conform to those of the selected world region.