Active and passive directional acoustic radiating
First Claim
1. An audio system comprising:
- a crossover network for separating a left channel, a right channel, and a center channel into low frequency content, midrange frequency content, and high frequency content;
an omnidirectional acoustical device for radiating acoustic energy corresponding to the low frequency content of a combined left channel, right channel, and center channel;
a first directional array, comprising signal processing circuitry and more than one acoustic driver, for radiating acoustic energy corresponding to the midrange content of one of the left channel and right channel signal so that more acoustic energy corresponding to the midrange content of one of the left channel signal and the right channel signal is radiated laterally than in other directions; and
a first passive directional device, for radiating acoustic energy corresponding to the high frequency content of the one of the left channel and right channel signal so that more acoustic energy corresponding to the high frequency content of the one of the left channel signal and the right channel signal is radiated laterally than in other directions.
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Abstract
An three-way audio system that uses directional arrays for radiating mid-frequency acoustic energy and passive directional devices to radiate the high frequencies. the system includes a left channel, a right channel, and a center channel. A crossover network separates the left channel and the right channel into low frequency content, midrange frequency content, and high frequency content. An omnidirectional acoustical device radiates acoustic energy corresponding to the low frequency content of the combined left channel, right channel and center channel. A first directional array, comprising signal processing circuitry and more than one acoustic driver, radiates acoustic energy corresponding to the midrange content of one of the left channel and right channel signal so that more acoustic energy corresponding to the midrange content of one of the left channel signal and the right channel signal is radiated laterally than in other directions. A first passive directional device, radiates acoustic energy corresponding to the high frequency content of the one of the left channel and right channel signal so that more acoustic energy corresponding to the high frequency content of the one of the left channel signal and the right channel signal is radiated laterally than in other directions.
169 Citations
27 Claims
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1. An audio system comprising:
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a crossover network for separating a left channel, a right channel, and a center channel into low frequency content, midrange frequency content, and high frequency content; an omnidirectional acoustical device for radiating acoustic energy corresponding to the low frequency content of a combined left channel, right channel, and center channel; a first directional array, comprising signal processing circuitry and more than one acoustic driver, for radiating acoustic energy corresponding to the midrange content of one of the left channel and right channel signal so that more acoustic energy corresponding to the midrange content of one of the left channel signal and the right channel signal is radiated laterally than in other directions; and a first passive directional device, for radiating acoustic energy corresponding to the high frequency content of the one of the left channel and right channel signal so that more acoustic energy corresponding to the high frequency content of the one of the left channel signal and the right channel signal is radiated laterally than in other directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for operating an audio system comprising:
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radiating omnidirectionally acoustic energy corresponding to the low frequency content of a combined left channel, right channel, and center channel; radiating directionally, from a first directional array comprising signal processing circuitry and more than one acoustic driver, acoustic energy corresponding to the midrange content of the left channel so that more acoustic energy corresponding to the left channel signal is radiated leftwardly than in other directions; radiating directionally, from a second directional array comprising signal processing circuitry and more than one acoustic driver, acoustic energy corresponding to the midrange content of the right channel so that more acoustic energy corresponding to the right channel signal is radiated rightwardly than in other directions; radiating directionally, from a third directional array comprising signal processing circuitry and more than one acoustic driver, acoustic energy corresponding to the midrange content of the center channel so that more acoustic energy corresponding to the center channel signal is radiated in a direction substantially orthogonal to the direction of greater radiation of the first directional array and the direction of greater radiation of the second directional array; radiating directionally, from a first passive directional device, acoustic energy corresponding to the high frequency content of the left channel so that more acoustic energy is radiated leftwardly than other directions; and radiating directionally, from a second passive directional device, acoustic energy corresponding to the high frequency content of the right channel so that more acoustic energy is radiated rightwardly than other directions. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification