Loudspeaker array system
阅读说明:本技术 扬声器阵列系统 (Loudspeaker array system ) 是由 林总一郎 持丸彰 于 2018-04-27 设计创作,主要内容包括:本发明提供了一种阵列,该阵列包括多个驱动器,每个驱动器具有相同的尺寸和类型,以将经处理的音频信号转换成声波;用于接收音频信号和控制信号的输入;以及至少一个信号处理器,以根据所接收的音频信号和控制信号来提供经处理的音频信号。信号处理器接收音频信号和控制信号,并且部分地基于音频信号和从控制信号接收的第一参数向第一驱动器提供第一处理信号,并且部分地基于音频信号和从控制信号接收的第二参数向第二驱动器提供第二处理信号。(The present invention provides an array comprising a plurality of drivers, each driver being of the same size and type to convert a processed audio signal into sound waves; an input for receiving an audio signal and a control signal; and at least one signal processor to provide a processed audio signal in dependence on the received audio signal and the control signal. The signal processor receives the audio signal and the control signal and provides a first processed signal to the first driver based in part on the audio signal and a first parameter received from the control signal and a second processed signal to the second driver based in part on the audio signal and a second parameter received from the control signal.)
1. A speaker array, comprising:
an input for receiving an audio signal and a control signal;
a plurality of drivers, each of the drivers having the same size and type and configured to convert the processed audio signal into sound waves; and
at least one signal processor coupled to the input and configured to receive the audio signal and the control signal and configured to provide a first processed signal to a first driver of the plurality of drivers, the first processed signal based in part on the audio signal and a first parameter received from the control signal, and to provide a second processed signal to a second driver of the plurality of drivers, the second processed signal based in part on the audio signal and a second parameter received from the control signal.
2. The speaker array of claim 1, wherein the at least one signal processor comprises at least one gain component configured to control an amplitude of the acoustic wave generated by the first driver based at least on the first parameter independent of the amplitudes generated by other drivers of the plurality of drivers.
3. The speaker array of claim 1, wherein the at least one signal processor comprises at least one delay component configured to control a delay of the sound wave generated by the first driver based at least on the first parameter independent of any delay associated with other drivers of the plurality of drivers.
4. The speaker array of claim 1, wherein the first and second parameters each comprise at least one of a time delay, a phase delay, an amplitude, a gain, an equalization, and a finite impulse response.
5. The loudspeaker array of claim 1, wherein the at least one signal processor is configured to provide the first processed signal with a frequency range substantially equal to a frequency range of the audio signal.
6. The speaker array of claim 1, wherein the at least one signal processor is configured to provide a different processed signal to each of the plurality of drivers, the plurality of different processed signals being based on the audio signal and a plurality of parameters received from the control signal.
7. The speaker array of claim 1, further comprising an output configured to provide at least a portion of the audio signal and the control signal to another sound line array.
8. An acoustic array, comprising:
a housing;
an input for receiving an audio signal and a control signal;
a plurality of acoustic transducers coupled to the enclosure, each of the plurality of acoustic transducers being of the same size and type and configured to convert a processed audio signal into sound waves; and
at least one signal processor coupled to the input and configured to receive the audio signal and the control signal and configured to provide a first processed signal to a first acoustic transducer of the plurality of acoustic transducers, the first processed signal based at least in part on the audio signal and the control signal, and to provide a second processed signal to a second acoustic transducer of the plurality of acoustic transducers, the second processed signal based at least in part on the audio signal and the control signal.
9. The acoustic array of claim 8, wherein the at least one signal processor comprises at least one gain component configured to control an amplitude of the acoustic waves produced by the first acoustic transducer independent of the amplitudes produced by other acoustic transducers of the plurality of acoustic transducers.
10. The acoustic array of claim 8, wherein the at least one signal processor comprises at least one delay component configured to control a delay of the acoustic wave generated by the first acoustic transducer independent of any delay associated with other acoustic transducers of the plurality of acoustic transducers.
11. The acoustic array of claim 8, wherein the control signal comprises a plurality of parameters, each of the plurality of parameters comprising at least one of a time delay, a phase delay, an amplitude, a gain, an equalization, and a finite impulse response.
12. The acoustic array of claim 8, wherein the at least one signal processor is configured to provide the first processed signal with a frequency range substantially equal to a frequency range of the audio signal, and the first acoustic transducer is configured to reproduce the frequency range substantially equal to the frequency range of the audio signal.
13. The acoustic array of claim 8, wherein the at least one signal processor is configured to provide a different processed signal to each of the plurality of acoustic transducers, the plurality of different processed signals being based on the audio signal and a plurality of parameters received from the control signal.
14. The acoustic array of claim 8, further comprising an output configured to provide at least a portion of the audio signal and the control signal to another speaker array.
15. A method of producing an acoustic sound field, the method comprising:
receiving an audio signal;
receiving one or more array parameters;
processing the audio signal to provide a plurality of processed signals according to the one or more array parameters; and
providing each of the plurality of processed signals to at least one of a plurality of acoustic transducers.
16. The method of claim 15, wherein the one or more array parameters comprise at least one of time delay, phase delay, gain, amplitude, equalization, and finite impulse response.
17. The method of claim 15, wherein the one or more array parameters comprise a plurality of delay parameters, and processing the audio signal to provide a plurality of processed signals comprises delaying the audio signal according to the delay parameters.
18. The method of claim 15, further comprising amplifying each of the plurality of processed signals prior to providing each of the plurality of processed signals to the at least one of the plurality of acoustic transducers.
19. The method of claim 18, wherein the one or more array parameters comprise a plurality of gain parameters, and amplifying each of the plurality of processed signals comprises amplifying each of the processed signals according to the gain parameters.
20. The method of claim 15, further comprising providing the audio signal and at least a portion of the one or more array parameters to a plurality of secondary acoustic transducers.
Technical Field
Aspects and examples of the present disclosure relate generally to audio systems, and in some examples, more particularly to audio systems for providing sound beam steering audio to a listener.
Background
The beam steering audio array system includes a plurality of speaker drivers and controls the gain and delay of the signals sent to the drivers such that their combined effect is to direct the acoustic energy such that it is favorable in a particular direction, such as toward a central portion of the audience, and such that it provides some desired coverage, e.g., such that all members of the audience receive an acceptable audio experience. Conventional array systems may include complex or user-unfriendly methods of changing or adapting the acoustic beam steering or other acoustic characteristics of the array, and may include drivers of different sizes to handle different portions of the spectrum with reduced reliability at additional cost and complexity.
Disclosure of Invention
Aspects and examples relate to speaker array systems and methods and signal processing systems and methods that provide improved acoustic characteristics, including beam steering and coverage, at a lower cost than conventional array systems.
According to one aspect, a speaker array includes an input receiving an audio signal and a control signal, a plurality of drivers each having a same size and type and configured to convert a processed audio signal into sound waves, and at least one signal processor coupled to the input and configured to receive the audio signal and the control signal and configured to provide a first processed signal to a first driver of the plurality of drivers, the first processed signal based in part on the audio signal and a first parameter received from the control signal, and to provide a second processed signal to a second driver of the plurality of drivers, the second processed signal based in part on the audio signal and a second parameter received from the control signal.
The first and second parameters may include at least one of time delay, phase delay, amplitude, gain, equalization, and finite impulse response.
In some examples, the at least one signal processor includes at least one gain component configured to control an amplitude of the acoustic wave generated by the first driver based at least on the first parameter, independent of amplitudes generated by other drivers of the plurality of drivers.
In some examples, the at least one signal processor includes at least one delay component configured to control a delay of the acoustic wave generated by the first driver based at least on the first parameter, independent of any delay associated with other drivers of the plurality of drivers.
In some examples, the processor is configured to provide the first processed signal with a frequency range substantially equal to a frequency range of the audio signal.
According to some examples, the at least one signal processor is configured to provide a different processing signal to each of the plurality of drivers, the different processing signal being based on the audio signal and the plurality of parameters received from the control signal.
In some examples, the speaker array includes an output configured to provide at least a portion of the audio signal and the control signal to another sound line array.
In some examples, the at least one processor is configured to provide the first processed signal having the full frequency range to the first driver, and the first driver is configured to receive the first processed signal having the full frequency range. In some examples, the full frequency range may include a range of 60Hz to 18,000Hz, or may include a range of 100Hz to 15,000Hz, or may include a range of 200Hz to 12,000 Hz.
In some examples, the speaker array is capable of producing a coaxial Sound Pressure Level (SPL) in an anechoic environment having a +/-3dB frequency range of 75Hz to 13kHz or better and a-10 dB frequency range of 58Hz to 16kHz or better, and equalization.
The speaker array may include at least twelve drivers. In some examples, the speaker array has exactly twelve drivers.
The drivers may all have dimensions less than 3.5 inches. The drivers may all have dimensions in the range of 2 inches to 3 inches. In some examples, the diameter of the driver is about 2.5 inches. In some examples, the drivers are spaced approximately 3 inches apart on center.
The at least one signal processor may comprise one signal processing channel for each of the plurality of drivers.
In some examples, the signal processor is configured to provide the third processed signal to the third driver. The first, second, and third processed signals may include first, second, and third delays, respectively, having a non-linear relationship.
According to another aspect, a speaker array includes a housing, an input to receive an audio signal and a control signal, a plurality of acoustic transducers coupled to the housing, each of the plurality of acoustic transducers being of a same size and type and configured to convert a processed audio signal into a sound wave, and at least one signal processor coupled to the input and configured to receive the audio signal and the control signal and configured to provide a first processed signal to a first acoustic transducer of the plurality of acoustic transducers, the first processed signal based in part on the audio signal and the control signal, and to provide a second processed signal to a second acoustic transducer of the plurality of acoustic transducers, the second processed signal based in part on the audio signal and the control signal.
In some examples, the acoustic array includes at least one gain component configured to control an amplitude of an acoustic wave generated by a first acoustic transducer independent of amplitudes generated by other acoustic transducers of the plurality of acoustic transducers.
In some examples, the acoustic array includes at least one delay element configured to control a delay of the acoustic wave generated by the first acoustic transducer independent of any delay associated with other acoustic transducers of the plurality of acoustic transducers.
In some examples, the control signal includes a plurality of parameters, each of the plurality of parameters including at least one of a time delay, a phase delay, an amplitude, a gain, an equalization, and a finite impulse response.
In some examples, the at least one signal processor is configured to provide a first processed signal having a frequency range substantially equal to a frequency range of the audio signal, and the first acoustic transducer is configured to reproduce the frequency range substantially equal to the frequency range of the audio signal.
In some examples, the at least one signal processor is configured to provide a different processing signal to each of the plurality of acoustic transducers, the plurality of different processing signals being based on the audio signal and the plurality of parameters received from the control signal.
Some examples further include an output configured to provide at least a portion of the audio signal and the control signal to another speaker array.
In some examples, the at least one signal processor is configured to provide the first processed signal having the full frequency range to the first acoustic transducer, and the first acoustic transducer is configured to receive the first processed signal having the full frequency range. In some examples, the full frequency range may include a range of 60Hz to 18,000Hz, or may include a range of 100Hz to 15,000Hz, or may include a range of 200Hz to 12,000 Hz.
In some examples, the acoustic array is capable of producing a coaxial Sound Pressure Level (SPL) in an anechoic environment having a +/-3dB frequency range of 75Hz to 13kHz or better and a-10 dB frequency range of 58Hz to 16kHz or better, and equalization.
The acoustic array may include at least twelve acoustic transducers. In some examples, the acoustic array has exactly twelve acoustic transducers.
The acoustic transducers may all have dimensions less than 3.5 inches. The acoustic transducers may all have dimensions in the range of 2 inches to 3 inches. In some examples, the diameter of the acoustic transducer is about 2.5 inches. In some examples, the acoustic transducers are spaced approximately 3 inches apart on the center.
The at least one signal processor may comprise one signal processing channel for each of the plurality of drivers.
In some examples, the signal processor is configured to provide the third processed signal to a third acoustic transducer. The first, second, and third processed signals may include first, second, and third delays, respectively, having a non-linear relationship.
According to another aspect, there is provided a method of producing an acoustic sound field, the method comprising receiving an audio signal, receiving one or more array parameters, processing the audio signal to provide a plurality of processed signals in accordance with the one or more array parameters, and providing each of the plurality of processed signals to at least one of a plurality of acoustic transducers.
The one or more array parameters may include at least one of time delay, phase delay, gain, amplitude, equalization, and finite impulse response.
In some examples, a frequency range of each of the plurality of processed signals is substantially equal to a frequency range of the audio signal. In some examples, the frequency range may include a range of 60Hz to 18,000Hz, or may include a range of 100Hz to 15,000Hz, or may include a range of 200Hz to 12,000 Hz.
In some examples, the one or more array parameters include a plurality of delay parameters, and processing the audio signal to provide the plurality of processed signals includes delaying the audio signal according to the delay parameters.
In some examples, the plurality of acoustic transducers are capable of producing a coaxial Sound Pressure Level (SPL) in an anechoic environment having a +/-3dB frequency range of 75Hz to 13kHz or better and a-10 dB frequency range of 58Hz to 16kHz or better, and equalization.
The plurality of acoustic transducers may include at least twelve acoustic transducers. In some examples, the plurality of acoustic transducers has exactly twelve acoustic transducers.
The acoustic transducers may all have dimensions less than 3.5 inches. The acoustic transducers may all have dimensions in the range of 2 inches to 3 inches. In some examples, the diameter of the acoustic transducer is about 2.5 inches. In some examples, the acoustic transducers are positioned approximately 3 inches apart on center.
Some examples include amplifying each of the plurality of processed signals prior to providing each of the plurality of processed signals to the plurality of acoustic transducers. The one or more array parameters may include a plurality of gain parameters, and amplifying each of the plurality of processed signals may include amplifying each of the processed signals according to the gain parameters.
Some examples include providing the audio signal and at least a portion of the one or more array parameters to a plurality of secondary acoustic transducers.
Still other aspects, examples, and advantages of these exemplary aspects and examples are discussed in detail below. Examples disclosed herein may be combined with other examples in any manner consistent with at least one of the principles disclosed herein, and references to "an example," "some examples," "an alternative example," "various examples," "one example," etc. are not necessarily mutually exclusive and are intended to indicate that a particular feature, structure, or characteristic described may be included in at least one example. The appearances of such terms herein are not necessarily all referring to the same example.
Drawings
Various aspects of at least one example are discussed below with reference to the accompanying drawings, which are not intended to be drawn to scale. The accompanying drawings are included to provide illustration and a further understanding of the various aspects and examples, and are incorporated in and constitute a part of this specification, but are not intended as a definition of the limits of the invention. In the drawings, like or nearly like components illustrated in various figures may be represented by like numerals. For purposes of clarity, not every component may be labeled in every drawing. In the drawings:
FIG. 1 is a block diagram of an example of an array system;
FIG. 2 is a block diagram of an example of a speaker array;
FIG. 3 is a block diagram of an example of a stacked array; and is
FIG. 4 is a block diagram of another example of an array system.
Detailed Description
Aspects of the present disclosure relate to speaker array systems and methods that include multiple drivers of the same size and type and provide a substantially full range of sound fields while allowing beam steering and propagation by applying array parameters to the individual drivers. Having drivers of the same size and type to produce substantially the full range of sound allows the speaker array to have fewer components, be less costly, and be more reliable. A moderately sized driver allows the drivers to be more closely spaced and allows more drivers within a particular sized enclosure, thereby producing a more accurate sound field at a lower cost than a conventional array having larger drivers to produce lower frequencies.
In some examples, the speaker array systems disclosed herein may include a speaker array having multiple drivers of the same size and type and having dedicated signal processing and amplifier channels for each driver. The loudspeaker array produces a sound field with certain characteristics through the combined effect of the drivers, which may include beam shape, propagation, steering, direction, etc. or multiple beams achieved by applying array (e.g., beamforming) parameters to each driver. The array parameters are applied to each driver through various signal processing channels and amplifier channels, and include varying delays and gains for each driver as appropriate, and may include finite impulse response filters and equalization. The finite impulse response filter may, for example, impose time delays, phase delays, amplitude and equalization adjustments, or any combination of these adjustments, on each driver.
Examples disclosed herein may be combined with other examples in any manner consistent with at least one of the principles disclosed herein, and references to "an example," "some examples," "an alternative example," "various examples," "one example," etc. are not necessarily mutually exclusive and are intended to indicate that a particular feature, structure, or characteristic described may be included in at least one example. The appearances of such terms herein are not necessarily all referring to the same example.
It is to be understood that the examples of the methods and apparatus discussed herein are not limited in their application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. These methods and apparatus can be implemented in other examples and can be operated or performed in various ways. Examples of specific implementations are provided herein for illustrative purposes only and are not intended to be limiting. Also, the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," "having," "containing," "involving," and variations thereof herein, is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. References to "or" may be understood to be inclusive such that any term described using "or" may indicate any single one, more than one, or all of the stated terms. Any reference to front and back, left and right, top and bottom, upper and lower, and vertical and horizontal is for convenience of description, and is not intended to limit the present systems and methods or their components to any one positional or spatial orientation.
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Conventional loudspeaker arrays include two-way and three-way systems. Two-way systems usually comprise a drive for medium/low frequencies and a separate drive for high frequencies. Three-way systems typically include three separate types of drivers, one for bass or low frequencies (e.g., woofers), another for mid-range frequencies, and a third for high frequencies (e.g., tweeters).
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At least one example of a suitable physical arrangement of a single sized driver of relatively small size is disclosed in U.S. patent No. 7,260,235 entitled LINE electroaccoustical transport converter, published on 21/8/2007, which is hereby incorporated by reference for all purposes.
In at least one example, the drivers of the array may be staggered such that the centerline of each driver is not aligned with the centerline of an adjacent driver. For example, alternating drivers may be aligned or positioned such that the directions of their maximum radiation patterns are at an angle relative to each other. For ease of reference, the centerline of the driver is an imaginary line perpendicular to the central front surface of the mechanical radiating surface of the driver. For further reference, an example of an array with staggered centerlines is disclosed in U.S. patent 7,936,891 entitled "LINE ARRAY electroaccoustical transport center" published on 5/3/2011, which is hereby incorporated by reference for all purposes.
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In the various examples described above, reference is sometimes made to one or more signal processing channels. It will be appreciated that the various signal processing channels may be digital or analog in nature, and that particular examples of digital signal processing channels may therefore have analog counterparts substituted therefor, and analog signal processing may therefore have digital counterparts substituted therefor. It is to be understood that the conversion of signals from digital to analog and vice versa is well known in the art and that such conversion may include one or more digital-to-analog converters (DACs) and/or analog-to-digital converters (ADCs), respectively. In the above examples, such a translation may be included, but may not be discussed or illustrated. Those skilled in the art will understand how to make such conversions as necessary to implement the discussed examples. In particular, it should be understood that the processing in the
Having thus described several aspects of at least one example, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the scope of the invention. Accordingly, the foregoing description and drawings are by way of example only, and the scope of the invention should be determined from appropriate construction of the appended claims, and equivalents thereof.
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