Electroacoustical transducing
First Claim
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1. A method comprising:
- controlling at least two different audio electrical signals to be provided respectively to at least two electroacoustical transducers of an array to selectively reduce cancellation of acoustic signals produced by the transducers at frequencies below FD=c/2D, in which D is an inter-transducer distance and c is the speed of sound, the controlling being done as a function of at least one of a volume control and a detected signal level, the reduction in cancellation changing a radiated acoustic power spectrum of the array at frequencies below FD, andequalizing the audio electrical signals below FD based on the change in the radiated acoustic power spectrum.
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Abstract
Audio electrical signals are controlled to be provided to a plurality of electroacoustical transducers of an array to achieve directivity and acoustic volume characteristics that are varied with respect to a parameter associated with operation of the array. The controlling of the signals results in a change in the radiated acoustic power spectrum of the array as the characteristics are varied. The change in the radiated acoustic power spectrum of the array is compensated.
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Citations
19 Claims
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1. A method comprising:
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controlling at least two different audio electrical signals to be provided respectively to at least two electroacoustical transducers of an array to selectively reduce cancellation of acoustic signals produced by the transducers at frequencies below FD=c/2D, in which D is an inter-transducer distance and c is the speed of sound, the controlling being done as a function of at least one of a volume control and a detected signal level, the reduction in cancellation changing a radiated acoustic power spectrum of the array at frequencies below FD, and equalizing the audio electrical signals below FD based on the change in the radiated acoustic power spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Electroacoustical transducing apparatus comprising:
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an input terminal to receive an input audio electrical signal, a plurality of at least two electroacoustical transducers in an array, and circuitry constructed and arranged to generate and control at least two different but related output audio electrical signals from the input audio electrical signal, wherein the at least two different but related output signals are coupled respectively to said at least two electroacoustical transducers of an array and to selectively reduce cancellation of acoustic signals produced by the transducers at frequencies below FD=c/2D, in which D is an inter-transducer distance and c is the speed of sound, the controlling being done as a function of at least one of a volume control and a detected signal level, the reduction in cancellation changing a radiated acoustic power spectrum of the array at frequencies below FD and to equalize the output signals below FD based on the change in the radiated acoustic power spectrum. - View Dependent Claims (11, 12, 13, 19)
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14. An electroacoustical transducer array comprising:
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a source of related electrical signal components, a plurality of at least two electroacoustical transducers driven by respective ones of said related electrical signal components, an input terminal to receive input audio electrical signals, and circuitry constructed and arranged to generate at least two different but related output audio electrical signals coupled respectively to said at least two electroacoustical transducers of an array and to control the at least two different but related output signals to selectively reduce cancellation of acoustical signals produced by the transducers at frequencies below FD=c/2D, in which D is an inter-transducer distance and c is the speed of sound, the controlling being done as a function of at least one of a volume control and a detected signal level, the reduction in cancellation changing a radiated acoustic power spectrum of the array at frequencies below FD, and to equalize the output audio electrical signals below FD based on the change in the radiated acoustic power spectrum. - View Dependent Claims (15, 16, 17)
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18. A sound system comprising:
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a source of related electrical signal components, a pair of electroacoustical transducer arrays, each of the arrays comprising a plurality of electroacoustical transducers driven respectively by said related electrical signal components, an input terminal to receive input audio electrical signals, and circuitry constructed and arranged to generate two different but related output audio electrical signals coupled to respective ones of said electroacoustical transducers of respective arrays and to control the two different but related output signals to selectively reduce cancellation of acoustic signals produced by the transducers at frequencies below FD=c/2D, in which D is an inter-transducer distance and c is the speed of sound, the controlling being done as a function of at least one of a volume control and a detected signal level, the reduction in cancellation changing a radiated acoustic power spectrum of the array at frequencies below FD and to equalize the audio electrical signals below FD based on the change in the radiated acoustic power spectrum.
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Specification