KR20080082663A - Bi-planar loudspeaker system with time-phased audio output - Google Patents

Abstract

The present invention uses a system of three loudspeakers to achieve realistic stereophonic sound reproduction. The method uses a single enclosure for the left and right speakers positioned in front in a parallel plane, with a wedge shaped enclosure with the wedge affixed at the center of the single enclosure, and containing the third speaker positioned in parallel with the single enclosure containing the left and right speakers. The invention incorporates electronic circuitry to process the left and right audio input signals. The left and right channel signals are reduced to either channel, then summed and time-delayed to the center channel speaker. The wedge shaped enclosure interrupts the usual overlap of the left and right channels and fills this area with the specially derived center channel signal, such that the listener perceives a wider sound image space.

Description

Bi-PLANAR LOUDSPEAKER SYSTEM WITH TIME-PHASED AUDIO OUTPUT}

Cross Reference to Related Applications

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The present invention provides for realistic and dramatic reproduction of stereophonic sound through loudspeakers placed in specific places with time-phased center channels derived from two input channels. Deal with

Conventional stereo loudspeaker systems are controlled by using two separate loudspeaker enclosures. One speaker enclosure is located to the right of the listener's area. The other speaker enclosure is arranged symmetrically to the left of the listener area. A listener at any point in the listening area equidistant from the two speaker enclosures will be able to detect a fairly accurate stereo image.

Left channel information will be considered to originate from the left speaker. Right channel information will be considered to originate from the right speaker. Center channel information will be considered to originate from a point located between the left and right speakers. Similarly, stored sounds that are only generated to the right or left of the center may also be sensed directionally and accurately.

If the listener is not at an equidistant point from the two speaker systems, that is, not centered between the two speaker systems, this high-level center-channel positional definition can be obtained. none. In this case, the left sound is still believed to come from the left speaker. The right sound is still thought to come from the right speaker. However, at the center, channel information is not considered to occur at a location between two systems. Thus, without a highly defined center position, the overall stereoscopic image is greatly reduced.

The occurrence of this loss of center channel position is a relative time shift caused by the difference in distance from each of the left and right speaker systems to the listener. Acoustic waves propagate at Mach 1 or 334 meters per second. Although temperature, atmospheric pressure, and humidity can greatly affect the speed, this value is generally considered to be constant. In any case, the propagation velocity will be the same at both positions of the speakers divided in the same space. Although center channel information is applied to two speakers at the same time, acoustic waves from the nearest speakers will reach the listener's ear first. Acoustic waves from the speaker system that are further away from the listeners will arrive later, delayed by the additional distance required for them to travel before they reach the listener's ears.

For example, the listener is located at a central location in the listening environment that will be called "P" in this example. Location “P” is located about 167 centimeters (5.57 feet) from the left speaker (s) and about 200.4 centimeters (6.68 feet) from the right speaker (s). The acoustic waves from the left speaker will reach the listening position "P" at 5 milliseconds after being reproduced by the speaker. The acoustic waves from the right speaker (s) are reproduced by the right speaker and then reach the listening position "P" at 6 milliseconds, producing a difference of arrival time of 1 millisecond to be called "T". Audio information applied simultaneously to both the left and right speakers Sinθ (SIN theta) is the composite of the two signals sum, that is, Sinθ from the left speaker (s) and Sinθ + from the right speaker (s). As T will combine at the listening position "P". The net acoustic energy sensed at position "P" will be (Sinθ) + (Sinθ + T).

If in phase, the acoustic energy from the two sources can be structurally combined and produce greater net energy than either component. Also, if the two sources have different phases, the acoustic energy from the two sources can be destructively combined, and they can remove each other. This depends on the relative phase difference produced by the time change T. The French mathematician J.D.J Fourier has established formulas that allow one to calculate the relative phase for an arbitrary frequency for a fixed time change (T). For the given example, where T = 1 milliseconds, null frequencies are 500 KHZ, 1.5 KHZ, 2.5 KHZ, 3.5 KHZ, 4.5 KHZ, 6.5 KHZ, 7.5 KHZ, 8.5 KHZ, 9.5 KHZ, 10.5 KHZ , 11.5 KHZ, 12.5 KHZ, and so on. This is known as the comb effect from the regular space of null frequencies, and is a common problem in dual-enclosure stereo systems.

To mix the state, people listen with two ears spaced about 12 centimeters apart. This means that perception actually occurs at two discreet points in the listening environment. Each individual ear has a different response transform that further alters the frequencies sensed by the listener. One of the ways in which human ears focus sounds is by comparing the arrival times of the sound between one ear and the other. In a conventional dual speaker stereo system, if the center channel information does not hit both ears of the listener at the same time, the listener can no longer focus the direction of the center channel information and the stereo image is destroyed.

Audiophiles call the sweet spot the area of the listener environment equidistant from the two speaker systems. As a general system is set up in a room, the optimal point is usually large enough to accommodate one person. A common example would be a listening state involving three people seated side by side on a couch, and if the person sitting in the middle is at the optimal point, the person can enjoy accurate stereoscopic images, left Or the person sitting to the right will not be able to detect stereo with any grade of accuracy.

US Patent No. 4,058,675 (November 15, 1997), entitled "Loudspeaker System for use in a Stereophonic Sound Reproduction System," discloses a loudspeaker system, the loudspeaker system being configured to be driven by an audio input signal and And an out-of-phase that is configured to be driven by an input signal and a main speaker that emits acoustic energy towards the listener for stereoscopic reproduction, and smaller in magnitude than the acoustic energies provided by the main speaker. ) A sub-speaker that emits acoustic energies and reaches the listener with a time delay.

US Patent No. 6,069,962 (May 30, 2000), with the subtitle "Point Source Speaker System", made another attempt to expand the optimal point. This patent is a dual voic-coil boss-coiled speaker with two high frequency speakers mounted coaxially at an angle of +/- 45 degrees to the center axis of the boss-mid range speaker. Initiate deployment using midrange speakers. This system only produces some separation at high frequencies. Midrange and low frequency acoustic energy is produced monophonically by a single-cone speaker.

US Patent No. 6,169,812 B1 (January 2, 2001), with the subtitle "Point Source Speaker System", made another attempt to expand the optimum point. The key to this invention is to place the three speakers in a single enclosure so that the axes of the acoustic waves produced by each of the speakers have an original common point. This patent also teaches changes in acoustic waveforms. The axis of each speaker for the adjacent one is set to 90 degrees. The left speaker is fed with a different signal (left minus right). The right speaker is fed with another signal (right minus left). The center speaker is provided as a sum signal (left plus right). This arrangement produces a very distinctly positioned center channel image. However, due to the 180 degree placement of the axes of the left and right speakers, the separation is lost at the outer limits of the optimum point.

U.S. Patent No. 5,557,680 (September 1996), entitled "Loudspeaker System for Producing Multiple Sound Images Within a Listening Area from Dual Source Locations," shows a center channel audio image derived from two input left and right channels. Try an approach to create, and then place two cabinets on the other side and at any angle to the listener. Two cabinets accommodate the speakers for the left / right channel inputs along with the speaker for the derived center channel. This patent attempts to eliminate time phasing problems by placing center channel speakers in the same enclosure with left and right channel speakers occupying different axes.

U.S. Patent No. 5,426,702 (June 1995), entitled "System for Deriving a Center Channel Signal from an Adapted Weighted Combination of the Left and Right Channels in a Stereophonic Audio Signal", describes both left and right channel inputs. It teaches a weighted calculation method for deriving the center channel audio image from. However, this patent does not teach how to place speakers to get an improved optimum from this method.

US Patent No. 5,610,986 (March 1997), entitled "Linear-Matrix Audio-Imaging System and Image Analyzer," teaches how to derive a center channel audio image from both left and right channel inputs. . This teaching does not take into account the time difference due to speaker placement, nor does it take into account the time difference required on the center channel to synchronize the right and left images with the center channel.

1 consists of three speakers embodying the present invention, with right and left speakers and a center speaker contained within a centrally located wedge that derives sound from both right and left speakers, The enclosure of a single rectangular shape from the frontal angle is shown.

FIG. 2 has two cavities for left and right speakers with a third speaker in the center wedge, showing a single rectangular enclosure from the top surface, with acoustic wave propagation patterns exposed.

3 depicts the main connections between signal processing and audio signal inputs, which output the processed audio signal to speakers.

4 shows a single rectangular shaped enclosure from the top, with two cavities for left and right speakers with a third speaker in the center wedge.

5 depicts a front view of a single enclosure to the rear and a wedge shaped enclosure to the front.

FIG. 6 depicts an angled view of a single enclosure to the rear and a wedge shaped enclosure to the front.

7 depicts a prior art showing acoustic waves generated by a legacy two speaker stereo loudspeaker system.

8 depicts a sound image region and acoustic waves generated by an embodiment of the present invention without a time delay feature.

9 depicts a prior art showing acoustic waves and sound image space using a conventional point source loudspeaker system.

10 depicts the apparent sound image and acoustic waves produced by the present invention.

The present invention consists of a single rectangular shaped speaker enclosure 10 comprising both left channel 16 and right channel 18 speakers located in a common plane. The speakers are fired side by side as closely as possible to each other. The speaker for the center channel 20 is mounted in the wedge 12 in front of two coplanar speakers in a parallel plane. A wedge 12 extending from the front of the rectangular shaped speaker enclosure 10 that couples the center channel speakers 20 separates the left 16 and right 18 channel speakers and a portion of their acoustic energy. Reflect.

A temporal-delay crossover network 82 separates the left channel audio output signal 40, the right channel audio output signal 70 and the center channel audio output signal 55 by frequency into a midrange. And / or high-range left channel tweeters 15, right channel tweeters 17 with low range sub-woofer speakers 25. And feed the center channel tweeters 19, and also delay the center channel output 55 to hear the illusion of wide soundstage behind the speaker enclosures 10, 12. Create a broader waveform that you supply to.

The reason why the signal applied to the center channel power amplifier 50 is delayed is due to the plane including the center channel speaker 20 and the plane including the left channel speaker 16 and the right channel speaker 18. This is because the distance between them places the center speaker very close to the listener (sitting directly in front of the center speaker). Without the temporary delay of the center channel speaker 20, the listener can recognize the sound well from the center channel speaker 20 before the arrival of the sound from the right channel speaker 18 or the left channel speaker 16. This temporary displacement produces a corresponding relative phase displacement that can be calculated using J.D.J Fourier's formulas.

The additional acoustic energy produced by the center channel speaker 20 (1/2 ｛L + R +) is unbalanced according to the identified energy, the total sum and the other energy. The acoustic energy of the system will be L + R + (1/2 ｛L + R｝). To compensate for this imbalance, the right channel audio input 60 signal and the left channel audio input 30 signals are processed as described in the descriptive detailed description of FIG.

In this system, the total acoustic energy is (R- ｛1 / 2L｝) + (L- ｛1 / 2R｝) + (｛1 / 2L｝ + ｛1 / 2R｝) which is restored to balance the current sound energy. = L + R. A diagram of the spatial energy distribution generated by an embodiment of the present invention has been described in the preceding figures.

In particular, FIG. 4 shows the locations where electrical energy is applied to the three main speakers. The resulting acoustic energy as propagated into the listening area by the speakers is shown in FIG. 2. If the acoustic level measurements are obtained from the farthest left edge of the left channel energy region 42 (see FIG. 2) to the furthest right edge of the right channel energy region 72, this indicates that the left acoustic energy is leftmost You will see immediately that it is the largest at the edge. The right acoustic energy is greatest at the rightmost corner of the right channel energy region 72. At the leftmost corner of the left channel energy region 42, the right acoustic energy is null ((1 / 2R from center channel speaker 20) + (− 1 / 2R from left channel speaker 16) = 0.

At the exact center of the center channel energy region 52, the right acoustic energy is (1 / 4R) and the left acoustic energy is (1 / 4L). This is the point where the left and right energies are in the same listening environment. At all right points of the center, the right energy is greater than the left energy. At all left points of the center, the left energy is greater than the right energy. Using FIG. 2, it is clear that any point in the shadow has a specific ratio of left and right energies.

For example, the listener's left ear is located at some point P (left) in the projection and his right ear is located at a second point P (right) in the projection. Point P (right) is 12 centimeters (average width of the listener's head) closer to the right edge of the acoustic region than point P (left). Point P (left) is 12 centimeters closer to the left edge of the acoustic region than point P (right). From this information we can infer the following:

The left acoustic energy identified by the left ear at point P (left) will be greater than the left acoustic energy identified by the right ear at point P (left). Similarly, the right acoustic energy identified by the right ear at point P (right) will be greater than the right acoustic energy identified by the left ear at point P (left). The right ear hears more right energy, and the left ear hears more left energy. Thus, the right energy will be seen to occur at the phantom point R (Q) to the right of the enclosure and the left energy will be considered to be derived from the phantom point L (Q) to the left of the enclosure. These set states are valid for all sets of two points located anywhere in the propagated energy regions of the wedge. Stereo images can be captured while the two points are not equidistant to the two corners of the propagated energy region.

There is a special case where stereo recognition cannot occur. If the line of sight of the listener is perpendicular to the direction of the rectangular enclosure 10, both ears (point P ｛left｝ and point P ｛right｝) are equidistant from both edges of the acoustic energy region. would. Thus, no difference in level will be noticed for left or right signals. This listener will not be able to recognize stereo.

Reference numbers

5 Enclosure Circuit: Shows the major components of the circuits necessary to process and connect the audio components within the speaker enclosure.

7 Tweeter speaker support: A different type of support wire for tweeter speakers mounted in the center of each channel speaker.

10 rectangular shaped speaker enclosure: means for receiving a wedge including a right channel speaker, a left channel speaker, an enclosure circuit and a center speaker.

11 Enclosure partition: Separates the left cavity from the right cavity into the interior.

12 Wedge: Reflects the right and left channel acoustic waves and fixes the center speaker.

14 wedge attachment point: A point for attaching a wedge to the center of a speaker enclosure.

15 Left channel tweeter: Speakers for the transmission of high range sound waves to the left channel.

16 Left channel speaker: Delivers acoustic waves delivered to the left speaker.

17 Right channel tweeter: Speakers for the transmission of high range acoustic waves transmitted to the right channel.

18 Right channel speaker: Delivers acoustic waves delivered to the right speaker.

19 Center channel tweeter: Speakers for the transmission of high range sound waves transmitted to the center channel.

20 Center channel speaker: Delivers acoustic waves transmitted directly to the center channel.

21 Enclosure face plane: The front plane of the enclosure in which two speakers are placed.

22 Wedge left suppression surface: applied or made of material to minimize the reflection of high frequency acoustic waves.

23 Wedge Right Suppression Surface: Applied or made of material to minimize reflection of high frequency acoustic waves.

24 Wedge face plane: The front plane of the wedge in which the center channel speaker is placed.

25 Sub-woofer Speaker: A sub-woofer for delivering low range acoustic waves.

26 Right cavity: Open on the right side of the speaker enclosure to receive the right channel speaker.

28 Left cavity: Open on the left side of the speaker enclosure to receive the left channel speaker.

30 Left channel audio input: Where the audio signal for the left channel is input to the enclosure.

32 Left Channel Power Amplifier: Accepts input signals and amplifies them with the left channel audio output.

34 left channel conductor: A direct left audio channel conductor from the left channel audio input to a left channel power amplifier.

36 left channel attenuator: A component consisting of resistors (R3, R4) applied to the left channel audio signal to reduce the signal in half.

38 Left channel conducer: A connector combined with an attenuator that now connects the original, attenuated left channel input signal to the right channel output amplifier.

40 Left channel audio output: Where audio signals for the left channel are output to the left channel speakers.

41 Left Channel High Frequency Audio Output: Where the high frequency portion of the audio signal for the left channel is output to the left channel tweeter.

42 Left channel energy area: Where acoustic energy from a left channel speaker is propagated and reflected by a wedge.

50 Center Channel Power Amplifier: Accepts input signals and amplifies them with the center channel audio output.

52 Center channel energy area: Where acoustic energy from a center channel speaker propagates to the left and right energy areas.

55 Center channel audio output: Where audio signals for the center channel are output to the center channel speakers.

56 Center channel high frequency audio output: Where the high frequency portion of the audio signal for the center channel is output to the center channel tweeter.

58 Center channel summing conductor: The connection between a summing junction and a time delay network.

59 center channel time delay conductor: A connection between a time delay network component and a center channel power amplifier.

60 Right channel audio input: Where the audio signal for the right channel is input to the enclosure.

62 Right Channel Power Amplifier: Accepts input signals and amplifies them with the right channel audio output.

64 Right channel conductor: DC right audio channel conductor from the right channel audio input to the right channel power amplifier.

66 right channel attenuator: A component consisting of resistors (R1, R2) applied to the right channel audio signal to reduce the signal in half.

68 Right channel conduit: A connector combined with an attenuator that now connects the original, attenuated right channel input signal to the left channel output amplifier.

70 Right channel audio output: Where audio signals for the right channel are output to the right channel speakers.

71 Right channel high frequency audio output: Where the high frequency portion of the audio signal for the right channel is output to the right channel tweeter.

72 Right channel energy area: Where acoustic energy from a right channel speaker is propagated and reflected by a wedge.

80 Summing junction: A component that accepts and sums left and right audio signals so that the output is one and a half times the combined left and right signals.

82 time delay network: A component that generally accepts signals as input from a summing junction, and then the input signal is time delayed by a factor T.

83 Sound image space: An area / space in which listeners can perceive the arrival of acoustic energy.

84 Combined energy area: The area where acoustic energy from the right, left and center channel speakers propagates.

Drawings

In FIG. 1, the rectangular shaped speaker enclosure 10 is a hollow block. The inner partition 11 separates the inside of the block into the left cavity 28 and the right cavity 26, so as to separate chambers for the rear projections of the left channel speaker 16 and the right channel speaker 18. Provide separate chambers. The hollow wedges 12 have two apexes that contact the rectangular enclosure speaker enclosure 10 to the wedge attachment points 14 equidistant between the left channel speaker 16 and the right channel speaker 18. It is mounted between the two speakers. The third speaker and center channel speaker 20 are mounted to the base of the wedge 12. Wedge 12 is positioned such that wedge face plane 24 is parallel to enclosure face plane 28. The base of the wedge 12 is parallel to the base of the rectangular speaker enclosure 10. The top of the wedge 12 is parallel to the top of the rectangular speaker enclosure 10. The spacing between the enclosure plane 28 and the wedge plane 24 is equal to the altitude of the triangular sides of the wedge 12. The wedge left suppression surface 22 facing the left channel speaker 16 and the wedge right suppression surface 23 facing the right channel speaker 18 are made of material (or coated) to minimize the reflection of high frequency acoustic waves. ("Suppress"). This reduces high frequency spatters ("spatters").

2 depicts a left channel energy region 42, a center channel energy region 52 and a right channel energy region 72 generated by three speakers. Left channel speaker 16 mounted within rectangular shaped speaker enclosure 10 creates a left channel energy region 42. The right channel speaker 18 mounted within the rectangular speaker enclosure 10 creates a right channel energy region 72. The sub-woofer 25 is mounted to the bottom of the rectangular speaker enclosure 10. Center channel speaker 20 mounted within wedge 12 creates a center channel energy region 52. The right channel energy region 72 generated by the right channel speaker 18 mixes the left channel energy region 42 by the interference of the wedge right suppression surface 22 and the wedge left suppression surface 23. mixing). Interference of the wedge right suppression surface 23 substantially moves the maximum propagation axis of the right channel speaker 18 to the right of the wedge 12. Likewise, interference of the wedge left suppression surface 22 substantially shifts the maximum propagation axis of the left channel speaker 16 to the left side of the wedge 12. This diversion of the left channel speaker 16 acoustic energy and the right channel speaker 18 acoustic energy creates a lower energy zone toward the front of the enclosure. This region corresponds to the main propagation axis of the center channel speaker 20 and the resulting center channel energy region 52.

3 is a block diagram of a speaker enclosure circuit 5 that supplies electrical energy to three main channel speakers, namely the left channel 16, the right channel 18 and the center channel 20. Moreover, the high frequency outputs for the left channel 41, the right channel 71 and the center channel 56 are output to the left channel tweeter 15, the right channel tweeter 17 and the center channel tweeter 19, respectively. The right channel audio input 60 is fed directly to the input of the right channel power amplifier 62 via the right channel conductor 64. Similarly, the left channel audio input 30 is fed directly to the positive (non-inverting) input of the left channel power amplifier 32 via the left channel conductor 34. The left channel audio input unit 30 and the right channel audio input unit 60 are combined by the summing junction unit 80 to output one and a half times left + right. This signal (1/2 ｛L + R ') is fed to the input of the time delay network 82 via the center channel summing conductor 58. The output of the time delay network 82 is (1/2 ｛L + R｝) delayed by the time delay factor T. This delayed signal is applied to the positive (non-inverting) input of the center channel power amplifier 50 via the center channel time delay conductor 59. The right channel audio input 60 is applied to the right channel attenuator 66 consisting of resistors R3 and R4. The output of the right channel attenuator 66 is 1 / 2R and is applied to the "-" (inverting) input of the left channel power amplifier 32 via the right channel condenser 68. This changes the output of the left channel power amplifier 32 from L to L (1 / 2R). Similarly, left channel audio input 30 is applied to left channel attenuator 36 consisting of resistors R3 and R4. The output of the left channel attenuator 36 is 1 / 2L and is applied to the "-" (inverting) input of the right channel power amplifier 62 via the left channel condenser 38.

4 shows a left cavity 28 housing a left channel speaker 16, a right cavity 26 housing a right channel speaker 18, an enclosure circuit 5 such as the block diagram shown in detail in FIG. And a rectangular shaped enclosure 10 from the top surface with a wedge 12 receiving the center channel speaker 20 and attached to the speaker enclosure 10 at the wedge inserting point. Electrical inputs and outputs to the enclosure circuit 5 include the left channel input 30, the right channel input 60, the left channel audio output 40, the right channel audio output 70 and the center channel audio output ( 55).

 5 shows a left cavity 28 for receiving a left channel speaker 16 and a left channel tweeter speaker 15, a right cavity 26 for receiving a right channel speaker 18 and a right channel tweeter speaker 17, and It depicts a wedge face plane 24 and depicts a rectangular shaped enclosure 10 from the front, with a wedge 12 receiving a center channel speaker 20 with a center channel tweeter speaker 19. . Each tweeter speaker 15, 17, 19 is each left channel speaker 16 by two vertical cross supports 7 on the surface of each speaker enclosure 28, 26, 24. ), At the center of the right channel speaker 18 and the center channel speaker 20. The sub-woofer speaker 25 is seen in a profile protruding from the base of the rectangular shaped speaker enclosure 10.

6 shows a left cavity 28 that houses a left channel speaker 16 and a left channel tweeter speaker 15, a right cavity that houses a right channel speaker 18 and a right channel tweeter speaker 17 (not shown). 26, and a wedge that accommodates a center channel speaker 20 having a center channel tweeter speaker 19 and is attached to the speaker enclosure 10 at the wedge intersection 14. A rectangular shaped enclosure 10 from an angled perspective with 12) is depicted. Wedge left suppression surface 22 faces left channel speaker 16. The sub-woofer speaker 25 is seen in a profile projecting from the base of the rectangular shaped speaker enclosure 10.

FIG. 7 depicts a prior art of two traditional enclosure stereo systems with a left channel energy region 42, a right channel energy region 72 and a perceived sound image space 83 as experienced by the listener.

8 depicts a biplane single enclosure with no time delay network 82 involved. This figure shows the identified image space 83 as experienced by the listener. The rectangular shaped speaker enclosure 10 is depicted as a left channel speaker 16, a right channel speaker 18 and a center channel speaker 20 enclosed within a wedge.

9 depicts a conventional point source system with identified image space 83 as experienced by the listener. This figure shows a single speaker enclosure and the combined energy region produced by the technique.

FIG. 10 depicts a bi-planar single enclosure with time delay network 82 involved. This figure shows the identified image space 83 as experienced by the listener. The rectangular shaped speaker enclosure 10 is depicted as a left channel speaker 16, a right channel speaker 18 and a center channel speaker 20 enclosed within a wedge. This figure also depicts the combined energy region 84 emanating from the left, right and center channel speakers with the time delay network 82 (not shown) involved.

Claims (5)

Input means for receiving first and second channel audio input signals, said first and second channels being referred to as a left audio input signal channel L and a right audio input signal channel R, respectively, First, second and third audio output channels for generating first, second and third audio output signals, Three loudspeakers, each having the same size and input / output designs, each receiving the first, second and third audio output signals, and generating acoustic energy output therefrom, Electrical circuitry incorporating deriving means coupled to the input means, wherein the derivation means derives the first audio output signal on the left channel output as L- ｛1 / 2R ,, and Derive the second audio output signal on the right channel output with < RTI ID = 0.0 > 1 / 2L < / RTI > and derive the third audio output signal on the center channel output with 1/2 < Is a temporary time delay applied to balance the first and second output channels with the third output channel, A single loudspeaker enclosure separated into two cavities, each of the two loudspeakers disposed closely in front of each cavity, in the same plane, and symmetrically facing the listener, and A wedge shaped loudspeaker attached between the two single loudspeaker enclosure cavities to the apex of the wedge at the center of the single loudspeaker, wherein the front of the wedge shaped loudspeaker enclosure is in each of the two single loudspeaker enclosures The wedge shaped loudspeaker has a depth from the front of the wedge shaped loudspeaker enclosure to the apex of the wedge that is equal to the depth of the cavity in the single loudspeaker enclosure, and incorporates acoustic energy suppression means. The wedge shaped loudspeaker enclosure in a plane parallel to the two speakers in the single loudspeaker enclosure at the front of the wedge shaped loudspeaker enclosure facing the listener, with the inclined sides of the wedge shaped loudspeaker enclosure. That the audio output acoustic energy system comprising the loudspeaker of the third placed in a. The method according to claim 1, The single loudspeaker enclosure and the wedge shaped loudspeaker enclosure are means for deriving a plurality of supply high-range, mid-range and / or low-range audio output signal channels and respective audio on respective left, right and center channels. And a specified loudspeaker for outputting an output frequency range. The method according to claim 1, The single loudspeaker enclosure and the wedge shaped loudspeaker enclosure are both integrated into a single enclosure. The method according to claim 1, The single loudspeaker enclosure is divided into two separate enclosures, and the wedge shaped loudspeaker enclosure is equidistant between the two separate enclosures, the loudspeakers attached to the two separate enclosures and the wedge shaped The enclosure of the audio output acoustic energy system, characterized in that in planes parallel to each other. The method according to claim 1, The three loudspeakers are supplemented with sub-woofer and tweeter output loudspeakers.

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