KR950001931B1 - Loud speaker system - Google Patents

Abstract

The system gathers the sound scattered in the opposite or backward direction of a number of speakers. The system comprises; a loud speaker for each tube; the front side of lode speaker and the back side being in opposite direction; a number of intensive sound tubes with one output port; a mixing sound tube; a cylinder tube (4) where the sound is converged before the intensive sound tube is formed in front of the horn (3).

Description

Loud Speaker System

1A is an isometric view of a first embodiment of a loudspeaker system according to the present invention using four loudspeakers.

FIG. 1B is a front view of the first embodiment shown in FIG. 1A.

FIG. 1C is a rear view of the first embodiment shown in FIG. 1A.

FIG. 1D is a top view of the first embodiment shown in FIG. 1A.

FIG. 1E is a bottom view of the first embodiment shown in FIG. 1A.

FIG. 1F is a cross sectional view taken along the line AA ′ of FIG. 1B.

Figure 2a is an isometric view of a second embodiment of the present invention.

FIG. 2B is a front view of the second embodiment shown in FIG. 2A.

FIG. 2C is a rear view of the second embodiment shown in FIG. 2A.

FIG. 2D is a plan view of the second embodiment shown in FIG. 2A.

FIG. 2E is a cross sectional view taken along the line AA ′ of FIG. 2B.

3A is an isometric view of the third embodiment.

FIG. 3B is a front view of the third embodiment shown in FIG. 3A.

FIG. 3C is a rear view of the third embodiment shown in FIG. 3A.

3d is a cross sectional view taken along the line AA ′ of FIG. 2a.

FIG. 3E is a right side view of the third embodiment shown in FIG. 3A.

FIG. 3F is a left side view of the third embodiment shown in FIG. 3A.

4A is an isometric view of a fourth embodiment of the present invention.

4b is a front view of the fourth embodiment shown in FIG. 4a.

FIG. 4C is a rear view of the fourth embodiment shown in FIG. 4A.

4d is a cross-sectional view taken along the line AA ′ of FIG. 4b.

4E is a right side view of the fourth embodiment shown in FIG. 4A.

4F is a left side view of the fourth embodiment shown in FIG. 4A.

Figure 5a is an isometric view of a fifth embodiment of the present invention.

FIG. 5B is a front view of the fifth embodiment shown in FIG. 5A.

FIG. 5C is a rear view of the fifth embodiment shown in FIG. 5A.

FIG. 5D is a cross-sectional view taken along the line AA ′ of FIG. 5B.

FIG. 5E is a right side view of the fifth embodiment shown in FIG. 5A.

FIG. 5F is a left side view of the fifth embodiment shown in FIG. 5A.

* Explanation of symbols for main parts of the drawings

1: sound collection pipe 2: entrance opening end

3: horn 4: cylindrical tube

5: inlet end

The present invention relates to a new loudspeaker system and a loudspeaker telecommunication system for collecting and concentrating radiated sound toward the rear of the plurality of round speakers, ie, in a direction opposite to the front of the loudspeaker.

In the related arts, attempts have been made to improve the efficiency of the loudspeaker system and to accurately reproduce the Hi-Fi sound. In particular, two areas of loudspeaker systems have attempted to improve the loudspeakers' cones and diaphragms using modern technology, or improved materials, and to reduce undesirable vibrations and resonances in the speaker barrel. Loudspeaker systems for utilizing and manipulating the sound toward the rear of the speaker have also been proposed. For example, US Patent No. 4,439,644 to Brunney III, and Patent No. to Whitby. .4,524,846, Patent No. 4,807,293 to Weckler, and Patent No. 4,930,596 to Saiki et al.

U.S. Patent No. 4,439,644, issued to Brunney III, seals the rear of the loudspeaker barrel, removes pressure from the back of the speaker drive, and uses different thicknesses to attenuate and dissipate the sound dissipated Several vinyl layers are used. While this type of speaker system can minimize the vibration of the barrel and the spring-like compression or resonance amplification effects associated with the acoustic suspension vessel, it is generally not as efficient as the rear-emitting speaker system. In contrast, the present invention collects or concentrates the sound emitted towards the rear of at least two loudspeakers, and sends one sound focused horn.

In Patent No. 4,524,846 to Whitby and Patent No. 4,807,293 to Weckler, the loudspeaker system sends the sound radiated backward through the bent passages into the chamber. This type is known to have quite good performance. However, since the sound waves collide with the shield wall installed in the cylinder, resonance between the shield wall and the cylinder is inevitable when driving at high power, and thus Hi-Fi capability is minimized.

In addition, for high power, loudspeaker diaphragms should be large and have a relatively large propulsion distance, ie forward travel distance. Such structural arrangements to obtain high power require special designs and expensive materials. Moreover, because diaphragms must be large and robust to sustain high power, diaphragms usually have large inertia, which results in less sensitivity and undesirably increases reaction time, resulting in reduced Hi-Fi capability.

In Patent No. 4,655,615 to Saville and Patent No. 4,930,596 to Saiki, loudspeakers are accommodated in a special type of sound collector to modify the frequency response characteristics. However, the speaker efficiency thus arranged is reduced because sound is transmitted through a limited opening in which the sound reacts like a shield wall in the bin. Moreover, because of the modification of the frequency response characteristic, it is easy to generate a shimmering or distorted sound.

In the present invention, in contrast, the sound collecting tube freely aspirated does not color the sound, so that the sound generated from the loudspeaker can be directly heard.

In addition, in the present invention, in contrast to the existing inventions, the high power is obtained by collecting and concentrating sound waves generated from a plurality of small-capacity loudspeakers and outputting one horn. Production costs are significantly reduced compared to a single high-power loudspeaker system, but the low-inertia and propulsion distances provide the full Hi-Fi capability of a small capacity loudspeaker. Moreover, no shielding walls or media exist that cause resonance or undesirable reflection of sound in the speaker barrel. Sound waves through the sound collector can be freely breathed. In other words, by transmitting and concentrating the sound waves through the sound collecting tube that houses the loudspeakers, the increase in pressure behind the speaker or the reflection of sound in the loudspeaker casing, which causes undesirable sound distortion, are none or at least minimized. .

The present invention provides a new high power loudspeaker system utilizing a plurality of small capacity loudspeakers, in particular a plurality of loudspeakers in a corresponding number of cylindrical sound pipes, each loudspeaker without a sound collector material in the speaker box Sound waves that are attenuated by or reflected by a shielding wall or wall in the vat and eventually consumed are transmitted through the conduit instead, which forms a sound transmission path. The tubes gently converge and merge into one nearly cylindrical tube. Sound waves passing through each tube merge in the converged tube. One converged tube outlet is connected to or integrated with one universal or special sound collection horn for transmitting the collected sound in any desired direction. In order to minimize the acoustic resistance, the area of the speaker frame that blocks the diaphragm at the rear of the speaker is minimized to prevent reflection of the sound waves radiated toward the rear of the speaker from the frame. This maximizes the utilization of the sound radiated from behind the loudspeaker diaphragm and, consequently, the efficiency and Hi-Fi capability of the loudspeaker.

In addition, in order to minimize acoustic resistance in the sound collecting pipe, the diameter of each sound collecting pipe at the inlet should be at least equal to the maximum diameter of the diaphragm. The cross-sectional area at each intake pipe inlet is preferably slightly larger than the cross-sectional area at the outlet, but any size can be used as long as the pipe does not limit or interfere with sound output. Moreover, since the loudspeaker permanent magnet moving coil occupies the center of the tube at the entrance, the tube should be wide enough at the entrance to allow sound waves to pass through the tube with minimal acoustic resistance. The preferred size specification described above allows sound waves to pass through the tube with minimal acoustic resistance.

All cylindrical sound collection pipes that house loudspeakers are gently merged into one cylindrical pipe. The cross-sectional area at this connection point need not be equal to the sum of the cross-sectional areas of each sound collecting pipe. The area of the combined cylinders to minimize the overall size of the current system can be close to or slightly larger than the exit cross-sectional area of each sound collection pipe, as long as the penis passage from each sound collection pipe to the sound collection pipe has a minimum acoustic resistance.

The outlet of the converging sound collection pipe may be connected to the sound horn or may be integral with the sound horn, which may be in the form of a brass instrument, amplification horn or the like that collects and concentrates sound waves passing through it. Basically, the horn prevents the sound from scattering radially and concentrates the sound waves in a specific direction. In addition, each loudspeaker can be directed in any desired direction. In other words, the loudspeakers can be directed in different directions between the loudspeakers or in the horn and other directions, for example, using a sound collector tube with different bends and curves.

Accordingly, one object of the present invention is to install a plurality of small-capacity loudspeakers that collect and concentrate the sound radiated toward the rear of the loudspeakers in a corresponding number of sound collecting pipes to efficiently and efficiently reproduce Hi-Fi sound. Making loudspeaker systems.

It is yet another object of the present invention to provide a loudspeaker system capable of concentrating and outputting the combined output into one horn.

Another object of the present invention is to have a plurality of loudspeakers, wherein a loudspeaker system in which these loudspeakers can be directed in different directions between the loudspeakers and in different directions from the horns using different sound collection tubes with different bends and curves. To provide.

The use of multiple small loudspeakers with a single sound horn has unique advantages in reducing production costs and improving efficiency, while simultaneously using a single high power loudspeaker with or without a single sound horn. It can maintain the Hi-Fi capability of a small loudspeaker compared to using it.

The foregoing invention and its features and advantages can be better understood and appreciated from the following description.

In the loudspeaker system 10-50 of the present invention, a plurality of loudspeakers (not shown) are accommodated or attached to a corresponding number of sound collecting tubes 1 according to an existing method. As shown in FIGS. 1-6, 2-4, 3-4, 4-4, and 5-4, the loudspeakers S are shown in the installation plot (not shown in detail in the drawing). It has a circular cross-sectional area, which is attached to the corresponding pipe's plot (F) by means of a device for attaching the barrel to existing loudspeakers such as screws, bolts and rivets.

Each sound collector houses one loudspeaker (S) so that the front of the speaker is generally exposed to the surroundings where the loudspeaker output is at its maximum. The entire rear face S 'of the loudspeaker is received in the tube 1. Sound waves generated from the rear of each loudspeaker and attenuated by the soundproofing material in the loudspeakers without the sound collecting pipe or reflected by the shielding walls or walls of the existing loudspeakers, are eventually collected and transmitted through the pipe instead. Form a negative transmission path.

In order to minimize the acoustic resistance through the sound transmission path, the sound collecting pipes converge and slowly merge into one cylindrical pipe 4 before being formed into the inlet end 5 of the horn 3. In the present embodiment, only the case in which the converged tube 4 is integrally formed with the horn 3 is shown, but horns of different directions or different shapes are clamped, fitted by friction, screwed, etc. It should be noted and appreciated that other alternative embodiments in which the horn can be detached or attached to the converging tube 4 so as to be able to attach using an existing tube and a device connecting the tube are also within the scope of the present invention. The horn can be of any existing form. The horn can be easily replaced to use different types of horns depending on the music and the taste of the listener. It should be noted that different horns can produce different tones, thus changing the tone of the notes.

The horn 3 shown in the embodiment of the present invention is straight for sending sound waves from the front of the loudspeaker. The horn can also send sound waves to walls or angled walls so that they can be reflected in multiple directions. A curved horn (not shown) can be used to send sound waves to the back or side of the speaker without the use of a wall or equivalent sound reflecting medium. A curved horn is useful when you need to send sound to the front and back of a speaker. Similarly, as shown in all embodiments of the present invention, it is preferable that the inlet opening ends 2 of the sound collecting tubes are arranged symmetrically in a straight line, whereas the opening ends need not be arranged in a straight line. That is, the inlet opening ends 2 of the sound collecting pipes all face the same direction and the output direction of the horn 3. However, it is also within the scope of the present invention to change the direction of the inlet end by replacing each collector pipe with a different bent pipe. By using differently curved sound collection pipes, the inlet openings can be directed in any desired direction to create a multidirectional loudspeaker system.

[First Embodiment]

As shown in the entire front view of Fig. 1A, the first embodiment presents a case of using four sound collecting tubes. As shown in FIG. 2B, tubes 1a-1b and 1b-1c are vertically aligned and tubes 1a-1b and 1c-1d are horizontally aligned. As described above, each sound collecting pipe accommodates one loudspeaker (S).

Second Embodiment

As shown in the entire front view of FIG. 2A, the second embodiment also shows the case of using four sound collecting tubes. In this embodiment, however, the collecting pipes are arranged at equal intervals around the horn 3. As shown in FIG. 2B, the tubes 1a ', 1b', 1c ', and 1d' are arranged at 90 degree intervals.

Third Embodiment

As shown in the overall front view of FIG. 3a, the third embodiment also presents a case of using four sound collecting tubes. In this embodiment, however, four tubes are arranged side by side, as shown in FIGS. 3B and 3C.

Fourth Embodiment

This embodiment is very similar to the third embodiment except that three tubes are used instead of four as shown in the overall front view of FIG. 4A.

[Example 5]

This embodiment is very similar to the fourth embodiment except that two tubes are used instead of three as shown in the overall front view of FIG. 5A.

Claims (4)

A horn means, a plurality of sound collecting pipes having an inlet end of one outlet end, and one loudspeaker for each tube, each loudspeaker having a front side and a rear side facing in the opposite direction to the front side; The front side of each loudspeaker is exposed to the surrounding space and the rear side of each loudspeaker is provided with a corresponding number of loudspeakers accommodated or installed in each inlet end, so as to face or adjoin the inlet. The outlet end is joined to one converging pipe means and the converging pipe means is connected to the horn means so that the sound radiated toward the rear side of each loudspeaker is the respective sound collecting pipe, the converged pipe and the horn. Loudspeaker systems configured to connect through the means The loudspeaker system according to claim 1, wherein said horn means is integral with said converged tube, and said converged tube is integrally formed by said plurality of sound collecting tubes. The loudspeaker system according to claim 1, wherein at least two sound collecting pipes are formed. The loudspeaker system according to claim 1 or 2, wherein the plurality of sound collecting pipes are formed such that all of their inlet ends face the same direction and the same direction as the horn means.