VIRTUAL HEIGHT FILTER FOR REFLECTED SOUND RENDERING USING UPWARD FIRING DRIVERS
3 Assignments
0 Petitions
Accused Products
Abstract
Embodiments are directed to speakers and circuits that reflect sound off a ceiling to a listening location at a distance from a speaker. The reflected sound provides height cues to reproduce audio objects that have overhead audio components. The speaker comprises upward firing drivers to reflect sound off of the upper surface and represents a virtual height speaker. A virtual height filter based on a directional hearing model is applied to the upward-firing driver signal to improve the perception of height for audio signals transmitted by the virtual height speaker to provide optimum reproduction of the overhead reflected sound. The virtual height filter may be incorporated as part of a crossover circuit that separates the full band and sends high frequency sound to the upward-firing driver.
-
Citations
62 Claims
-
1-42. -42. (canceled)
-
43. A speaker driver for rendering sound for reflection off of an upper surface of a listening environment, comprising:
-
a driver cone; a cone dust cap affixed to a central portion of the driver cone; and a frame securing the cone for mounting within a speaker cabinet, wherein at least one of the driver cone, dust cap, and frame are configured to apply a height filter having a frequency response curve that is configured to at least partially remove directional cues from a speaker location, and at least partially insert the directional cues from a reflected speaker location, the frequency response curve based on a first frequency response of a filter modeling sound travelling directly from the reflected speaker location to the ears of a listener at a listening position, for said inserting of directional cues from the reflected speaker location, and a second filter frequency response of a filter modeling sound travelling directly from the speaker location to the ears of the listener at the listening position, for removing of directional cues for audio travelling along a path directly from the speaker location to the listener. - View Dependent Claims (44, 45)
-
-
46. A system for rendering sound using reflected sound elements, comprising:
a speaker placed at a speaker location and comprising a housing enclosing an upward-firing driver oriented at an inclination angle relative to the ground plane and configured to reflect sound off an upper surface of a listening environment to produce a reflected speaker location; and a virtual height filter applying a frequency response curve to an audio signal transmitted to the upward-firing driver, wherein the virtual height filter at least partially removes directional cues from the speaker location and at least partially inserts the directional cues from the reflected speaker location, the frequency response curve based on a first frequency response of a filter modeling sound travelling directly from the reflected speaker location to the ears of a listener at a listening position, for said inserting of directional cues from the reflected speaker location, and a second filter frequency response of a filter modeling sound travelling directly from the speaker location to the ears of the listener at the listening position, for removing of directional cues for audio travelling along a path directly from the speaker location to the listener. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
-
59. A speaker for transmitting sound waves to be reflected off an upper surface of a listening environment, comprising:
-
a housing; an upward-firing driver within the housing and oriented at an inclination angle relative to a ground plane and configured to reflect sound off a reflection point on the upper surface of the listening environment; and a virtual height filter applying a frequency response curve to a signal transmitted to the upward-firing driver, the frequency response curve based on a first frequency response of a filter modeling sound travelling directly from a reflected speaker location to the ears of a listener at a listening position, for inserting of directional cues from the reflected speaker location, and a second filter frequency response of a filter modeling sound travelling directly from a speaker location to the ears of the listener at the listening position, for removing of directional cues for audio travelling along a path directly from a speaker location to the listener. - View Dependent Claims (60, 61, 62)
-
Specification