369 results about "Directional sound" patented technology

Techniques of making a recording of or transmitting a sound field from either multiple monaural or directional sound signals that reproduce through multiple discrete loud speakers a sound field with spatial harmonics that substantially exactly match those of the original sound field. Monaural sound sources are positioned during mastering to use contributions of all speaker channels in order to preserve the spatial harmonics. If a particular arrangement of speakers is different than what is assumed during mastering, the speaker signals are rematrixed at the home, theater or other sound reproduction location so that the spatial harmonics of the sound field reproduced by the different speaker arrangement match those of the original sound field. An alternative includes recording or transmitting directional microphone signals, or their spatial harmonic components, and then matrixing these signals at the sound reproduction location in a manner that takes into account the specific speaker arrangement. The techniques are described for both a two dimensional sound field and the more general three dimensional case, the latter based upon using spherical harmonics.

Cases or holders for cell phones, personal digital assistants, portable video / music players, electronic books, electronic tablets and other handheld and / or free-standing display devices, as well as the devices themselves are disclosed. In different embodiments, a versatile protective holder that can allow placement on any surface for hands-free viewing, with full adjustment of viewing angle in landscape and / or portrait orientations; directional sound reflecting and baffling; easier cleaning and viewing of the device's screen; easier grasping by the user; wearing of the device using a belt clip or arm or waist band; as well as attachment to an automobile, bicycle, or other vehicle are disclosed.