JPH04167697A - Speaker system - Google Patents

Abstract

PURPOSE:To prevent radiated sounds from bringing about reflection and mutual interference and to suppress the disturbance of the output acoustic pressure frequency characteristic of a speaker system by attaching an adapter to a part projecting from the baffle face of a radial horn. CONSTITUTION:An adapter 7 which has a gentle inclination toward a baffle face 1 and surrounds the periphery of a close speaker unit is set to the projecting part of the radial horn. Thus, radiated sounds from the close speaker unit are not reflected to the projecting part of the horn but are radiated forward, and not only reflection of radiated sounds from the speaker unit 2 is prevented but also the disturbance of the output acoustic pressure frequency characteristic of the speaker system is suppressed by the projecting part of the horn.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a multiway speaker system that converts electrical signals into music signals.

[Conventional technology] By distributing the music signal sent to the speaker system to multiple speaker units, such as a tweeter unit dedicated to high-frequency range reproduction and a woofer unit dedicated to low-mid range reproduction, the music signal is reproduced over a wide range of frequencies. There are many multi-way speaker systems that ensure a wide range of playback bands.

For example, Figure 6 shows "Speaker System (Top)" (written by Takeo Yamamoto, Radio Gijutsusha, first published on July 15, 1978)
P, 226 (Fig. 7.4(b)) is a front view showing a conventional multi-way speaker system having a radial horn speaker in the tweeter, and Fig. 7 is a side view of the speaker system shown in Fig. 6. , Figure 8 is the 7th
It is a sectional view taken along the line ■-■ in the figure.

In the figure, l is a baffle surface, 2 is a direct radiation speaker unit that reproduces the low-mid range of music signals, 3 is a radial horn speaker that reproduces high ranges of music signals, and 4
is a cabinet housing the speaker unit 2 and the horn speaker 3; 5 is a sound A emitted from the speaker unit 2; and 6 is a sound B emitted from the horn speaker 3.

Next, the structure will be explained.

The radial horn 3 has improved directivity in the horizontal plane. A radial horn 3 for a tweeter is sandwiched between the baffle surface 1, and one direct radiation type speaker unit 2 for a woofer is attached on the upper and lower sides. The shape of the radial horn 3 is such that the cross-sectional area gradually increases toward the tip, and the horizontal cross-sectional shape of the tip of the horn is formed by a curved surface as shown in FIG.

Therefore, when attached to a flat baffle surface, the tip, which is a convex curved surface, protrudes like a beak.

[Problems to be Solved by the Invention] When a radial horn speaker used in a conventional multi-way speaker system is mounted on a flat baffle surface, the tip of the horn speaker protrudes from the baffle surface in a beak shape. Therefore, a part of the sound radiated from the woofer speaker unit close to the horn speaker is reflected at the beak, which is the protruding part, and causes interference with other radiated sounds, which disturbs the output sound pressure frequency characteristics. There were problems such as being exposed.

This invention was made to solve the above-mentioned problems, and it prevents the reflection of radiated sound from nearby speaker units at the part of the tip of the horn speaker that protrudes from the baffle surface, and also improves the performance of the speaker system. The objective is to obtain a speaker system that can suppress disturbances in output sound pressure frequency characteristics.

[Means for Solving the Problems] A speaker system according to the present invention has a baffle which is approximately the same in shape as the protrusion of the radial horn speaker and is closer to the tip of the protrusion at a portion protruding from the baffle surface of the radial horn speaker. The present invention is characterized in that an adapter is provided which has a gentle slope toward the surface and surrounds the periphery of the speaker units disposed on the left and right, or above and below, close to the radial horn speaker.

[Function] In the speaker system according to the present invention, an adapter that has a gentle slope toward the baffle surface and surrounds the periphery of the adjacent speaker unit is attached to the protruding portion of the radial horn. The sound emitted from the unit is emitted forward without being reflected by the protruding part of the horn. Therefore, the projection of the horn prevents sound radiation from the speaker unit from being reflected, and also suppresses disturbances in the output sound pressure frequency characteristics of the speaker system.

[Example〕 The invention will now be explained with reference to the drawings.

FIG. 1 is a front view showing a speaker system according to an embodiment of the present invention, and FIG. 2 is a side view of the speaker system shown in FIG. In FIG. 1, reference numeral 7 denotes an adapter attached to a protruding portion of the radial horn 3. FIG. 3 shows a perspective view of the adapter 7. The other parts are the same as those of the conventional example, so the explanation will be omitted.

Next, the operation will be explained. An adapter 7 is attached to a beak-shaped portion of the radial horn 3 that protrudes from the baffle surface l. This prevents the sound A5 radiated from the speaker unit 2 close to the horn from being reflected and mutually interfered with by the protrusion of the radial horn 3, allowing efficient sound radiation.

FIG. 5 shows an output sound pressure frequency characteristic diagram of the speaker system according to the present invention. In the figure, characteristic 1 is a characteristic diagram of the conventional speaker system shown in FIG. 6, and characteristic 2 is a characteristic diagram of the speaker system according to the present invention shown in FIG. As is clear from this characteristic diagram, it can be seen that the adapter has the effect of suppressing disturbances in frequency characteristics.

In the above embodiments, the case where a radial horn is used as the horn speaker has been described, but other types of horn speakers in which the tip of the horn protrudes beyond the baffle surface, such as the sectodill type horn shown in FIG. The speaker 8 may also be used, and the same effect as in the above embodiment can be achieved.

[Effects of the Invention] As described above, according to the present invention, since the adapter is attached to the part of the radial horn that protrudes from the baffle surface, the sound radiated from the speaker unit close to the horn is transmitted to the protruding part of the radial horn. This has the effect of preventing reflections and mutual interference, as well as suppressing disturbances in the output sound pressure frequency characteristics of the speaker system.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a speaker system according to an embodiment of the present invention, FIG. 2 is a side view of the speaker system shown in FIG. 1, FIG. 3 is a perspective view of an adapter, and FIG. A front view of a speaker system showing another embodiment, FIG. 5 is an output sound pressure frequency characteristic diagram of the speaker system shown in FIG. 1, and FIG. 6 is a front view showing a conventional speaker system having a radial horn speaker. , FIG. 7 is a side view of the conventional speaker system shown in FIG.
FIG. 8 is a sectional view taken along the line ■--■ in FIG. 7. In the figure, ■ is the baffle surface, 2 is the speaker unit, 3 is the radial horn speaker, 4 is the cabinet, 5 is the radiated sound A, 6 is the radiated sound B, 7 is the adapter, and 8 is the sectoral horn speaker. be. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] In a speaker system in which a radial horn speaker that reproduces high-frequency music signals is sandwiched between multiple speaker units that reproduce low and midrange frequencies vertically or horizontally arranged on a baffle surface, the speaker unit that protrudes from the baffle surface of the radial horn speaker The radial horn speaker has a shape approximately equal to the shape of the protrusion of the radial horn speaker, has a gentle slope from the tip of the protrusion toward the baffle surface, and is arranged on the left and right or above and below the radial horn speaker in close proximity to the radial horn speaker. A speaker system comprising an adapter that surrounds a speaker unit.