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| Sound reproducing apparatus for use in vehicle |
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| Control arrangement for electronic appliance |
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| Color video display for audio signals |
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| Desk/wall mounted telephone subset |
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| Source data compression and decompression in code symbol printing and decoding |
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| Noise eliminating circuit |
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| High common mode relay multiplexer |
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| Loudspeaker having a voice coil and a piezoelectric feedback transducer |
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Four dimensional acoustical audio system
| Details |
Inventors: Goldfarb, Barry S.;
Assignee: BSG Laboratories, Inc. (Deland, FL)
Primary Examiner: Isen; Forester W.
Assistant Examiner:
Attorney, Agent or Firm: Quarles & Brady
A four-dimensional acoustical audio system utilizes both spatial and temporal signal processing to maximize the depth, width, and perceived directionality of the acoustic field with respect to the binaural auditory system. Transducers are critically placed within the confines of a reverberant enclosure, and each transducer is assigned a specific bandwidth of sound either in mono or stereo, depending upon the spatial location of the transducer to take advantage of the binaural auditory system of the intended listener. The system minimizes the number of transducers and electronics required to achieve the effect of a live performance, regardless of the dynamics of the enclosure in which it is placed. The loudspeaker system can be used in small enclosed volumes such as an automobile or extended to volumes the size of a motion picture theater or concert hall and even outdoors. |
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DETAILED DESCRIPTION I claim: 1.
A multi-dimensional acoustical audio system for immersive observation by a binaural auditory system in an enclosure having a front wall adjoining, at a first corner, a left wall and, at a second corner, a right wall, the left wall and the right wall extending rearwardly from the front wall, a sound field for an acoustic image being created in said enclosure, said audio system comprising: a central audio loudspeaker placed substantially centrally between the left wall and the right wall, said central audio loudspeaker having a band-limited input ranging in frequency from approximately 150 Hz to no more than approximately 10 kHz, creating a central image in, and greater depth to the sound field; and, a left side audio loudspeaker placed adjacent the left wall and a right side audio loudspeaker placed adjacent the right wall of the enclosure, said left side audio loudspeaker and said right side audio loudspeaker each being placed rearwardly of said central audio loudspeaker and each having a main stereophonic channel as an input, said channels each being band-limited to range in frequency from approximately 900 Hz to approximately 16 kHz, the left and right side audio loudspeakers being positioned with respect to one another to create a maximum width of the acoustic image and produce a stereophonic effect.
2.
The system according to claim 1, wherein the frequency range of the input to the central audio loudspeaker is band-limited to an upper frequency of not more than approximately 6 kHz.
3.
The system according to claim 1, wherein the frequency range of the input to the central audio loudspeaker is band-limited to an upper frequency of not more than approximately 3 kHz.
4.
The system according to claim 1, further comprising at least one sub-woofer audio loudspeaker having at least one low pass filtered input having a cutoff frequency of less than approximately 1000 Hz, said sub-woofer audio loudspeaker being placed adjacent a wall of the enclosure to acoustically couple the sub-woofer audio loudspeaker to the dynamics of the enclosure
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Audio Signal Processing 
