Bipolar speaker with improved clarity
First Claim
1. An improved bipolar loudspeaker system configured to provide improved localization, comprising:
- a first midrange or mid-bass loudspeaker mounted in a first front-facing baffle in an enclosure;
a second midrange or mid-bass loudspeaker mounted in said first front-facing baffle in said enclosure, wherein said second midrange or mid-bass loudspeaker is substantially identical to said first midrange or mid-bass loudspeaker;
a third midrange or mid-bass loudspeaker mounted in a second rear-facing baffle in said enclosure, wherein said third midrange or mid-bass loudspeaker is also substantially identical to said first midrange or mid-bass loudspeaker;
wherein said first, second and third substantially identical midrange or mid-bass loudspeakers are thereby mounted in opposing front and rear facing baffles in said enclosure to create a bipolar speaker assembly; and
said first, second and third substantially identical loudspeakers being interconnected to an audio signal source of power so that the rear sound power that is produced by the rear-facing third speaker is about 6 dB below the sound power produced by the forward-facing first and second loudspeakers, thereby improving localization while retaining the spacious envelopment of a bipolar sound field.
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Accused Products
Abstract
A forward focused bipolar loudspeaker system includes a front-facing driver array and a rear facing driver array with substantially identical front-facing and rear-facing midrange or mid-bass drivers voiced and driven so that the measured SPL curves of each of the arrays, when measured individually, are tonally balanced. The front array and rear array have substantially identical on-axis and off axis frequency response and the rear array'"'"'s output power (SPL) is reduced by, preferably, about 6 dB with respect to the output power produced by the front-facing array, while retaining a flat tonal balance for both the front and rear speakers, to produce a sound power ratio of about 2:1 as measured by comparing the front and back SPL levels of the speakers. This bipolar speaker system and method for voicing was discovered to provide greater clarity and improved localization while retaining the spacious envelopment of the bipolar sound field.
38 Citations
20 Claims
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1. An improved bipolar loudspeaker system configured to provide improved localization, comprising:
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a first midrange or mid-bass loudspeaker mounted in a first front-facing baffle in an enclosure; a second midrange or mid-bass loudspeaker mounted in said first front-facing baffle in said enclosure, wherein said second midrange or mid-bass loudspeaker is substantially identical to said first midrange or mid-bass loudspeaker; a third midrange or mid-bass loudspeaker mounted in a second rear-facing baffle in said enclosure, wherein said third midrange or mid-bass loudspeaker is also substantially identical to said first midrange or mid-bass loudspeaker; wherein said first, second and third substantially identical midrange or mid-bass loudspeakers are thereby mounted in opposing front and rear facing baffles in said enclosure to create a bipolar speaker assembly; and said first, second and third substantially identical loudspeakers being interconnected to an audio signal source of power so that the rear sound power that is produced by the rear-facing third speaker is about 6 dB below the sound power produced by the forward-facing first and second loudspeakers, thereby improving localization while retaining the spacious envelopment of a bipolar sound field. - View Dependent Claims (2, 3, 4, 5)
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6. An improved, front or forward focused, bipolar loudspeaker system, comprising:
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(a) a front-facing loudspeaker driver array including at least a first midrange or mid-bass driver mounted in a front baffle in an enclosure;
said front-facing array further including at least a first tweeter driver mounted in said front baffle in said enclosure;(b) a rear-facing loudspeaker driver array including at least a second midrange or mid-bass driver mounted in a rear baffle which opposes said enclosure'"'"'s front baffle;
said rear-facing array further including at least a second tweeter driver mounted in said enclosure'"'"'s rear baffle;(c) a crossover configured to receive an audio signal from an audio signal source and connected to said front array drivers and said rear array drivers; (d) wherein said crossover, said front-facing array'"'"'s drivers and said rear-facing array'"'"'s drivers arc interconnected to said audio signal source so that when said audio signal source provides said audio signal, the rear array'"'"'s sound power is less than the front array'"'"'s sound power by a selected forward focused power ratio being in the range of 2 dB-10 dB, thereby improving localization while retaining the spacious envelopment of a bipolar sound field. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of enhancing the sensation of spaciousness while preserving localization in a bipolar loudspeaker system, comprising:
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providing a loudspeaker system enclosure having a first front facing baffle or support surface opposing a second rear-facing baffle or support surface; mounting a first front-facing midrange speaker on said front facing baffle or support; selecting a second midrange speaker which is substantially identical to said first front-facing midrange speaker and mounting said second midrange speaker on said front facing baffle or support to provide a front facing array of substantially identical midrange speakers; selecting a third midrange speaker which is substantially identical to said first front-facing midrange speaker and mounting said third midrange speaker on said rear facing baffle or support to provide a rear facing midrange speaker which is substantially identical to the first and second front-facing speakers; connecting said first, second and third midrange speakers to a source of audio power to play together, thereby creating a bipolar speaker assembly; and driving said first, second and third midrange speakers from a common source of audio power so that the rear sound power that is produced by the rear-facing speaker is between 2 dB and 10 dB less than the sound power produced by the forward-facing speakers, thereby improving localization while retaining the spacious envelopment of the bipolar sound field. - View Dependent Claims (19, 20)
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Specification