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JPH03147499

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DESCRIPTION JPH03147499
[0001]
FIELD OF THE INVENTION The present invention relates to a loudspeaker having a speaker
mounting wall coupled at an angle of 70 "or less at the top (spew). Prior Art and Problems to be
Solved In the study and experiment of loudspeaker design, the inventor has found the importance
of keeping the acoustic intensity (acoas + ic 1 nte IIsity) at a wide angle off the axis of the
loudspeaker cabinet. Others have tried this by directing the loudspeaker in the direction of tilt to
the axis of the cabinet, which generated multiple images. The inventor has found a way to
arrange the loudspeakers in the loudspeaker cabinet so as to significantly broaden the acoustic
intensity angle on both sides of the cabinet axis, while maintaining stereo-dentity. The
loudspeaker with a pair of tops of the present invention accomplishes this while also distributing
high acoustic power, handling more power, and emitting sound from small outline stereo sources
(stereo 5ources) Can effectively fill the listening area extending between and beyond the
cabinets. SUMMARY OF THE INVENTION The loudspeakers having the top of the present
invention have a pair of loudspeaker mounting walls, which have walls that are extended at an
angle of 70 [deg.] Or less from the top. A pair of mounting walls are incorporated into the
loudspeaker cabinet. A loudspeaker cabinet connects the ends of the diverging mounting wall. A
pair of tweeters (1yeeters; treble loudspeakers) are respectively mounted in the upper area of the
mounting wall, and the zeta drivers are arranged at an angle, with the tator facing outward on
both sides of the top. A pair of woofers (voofers; low frequency loudspeakers) are likewise
mounted below the mounting wall's tweeter, with the woofers facing outward on both sides of
the top. The tweeter and woofer are mounted as close as possible to the top between the
mounting walls, and the distance spanned by the tator from the front of the top of the top is at
the width of the front of the single c C ↓ Almost equal. Similarly, the distance bridged by the
woofer from the top frontal point of view is approximately equal to the width of one woofer. This
causes the pair of tweeters and the pair of woofers to act as a small profile sound source from
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which the sound is directed to the respective broad dove on either side of the top. A single-tutor
signal drivs both tours d, a single woofer signal excites both -77, but if the pair of tautors and the
pair of woofers are in close proximity, otherwise, ie If the pair of w and the pair of woofers are
separated, the frequency response interference pattern that occurs in is eliminated.
EXAMPLE The mounting configuration of a pair of tweeters and a pair of woofers achieves the
improved sound from the loudspeaker of the present invention. This mounting configuration
comprises a top 15 between a pair of mounting walls 11.12 at an angle. These walls 11, 12 form
the sides of the preferred pentagonal cabinet of the loudspeaker 1o. This pentagonal cabinet has
three other sides 16.17 and 18. In the present embodiment, no two sides of the cabinet are
parallel to one another. The lack of parallelism helps to enhance the mechanical rigidity of the
loudspeaker 1 ° cabinet. It is also possible to make the cabinet into a triangular shape or to
provide other numbers of sides to the cabinet, but in the present embodiment the illustrated
pentagonal shape is for the effect and good appearance Is selected. In order to eliminate baffle
reflections (bi (rle reflections) from the cabinet of the loudspeaker 10, according to the invention,
the top 15 has a small radius smaller than 10 mm, preferably smaller than 7 mm. This ensures
that the buckle reflection along the top bisector does not enter the direct acoustic (directso ++ ++
d) phase ((hsse) of less than or equal to about 23,00 OH 2. The angle between the mounting
walls 11 and 12, ie the angle of the top 15, is preferably 70 ° or less. Experiments show that the
desired angle is between 60 ′ ′ and 70 °, and in this example 66 ° is selected as the top
angle between the mounting sides 11 and 12. The bisecting line of the top angle, which extends
outwardly from the top 15, forms the axis of the cabinet of the loudspeaker 10 and is generally
directed to the listening area. The cabinets of the two loudspeakers 10 spaced apart to form a
stereo pair have a top and an axis directed to the listening area where stereophonic sound is
heard. The attachment of the pair of tweeters 20 and the pair of woofers 25 with respect to the
top 5 is important to the shape of the acoustic pattern generated by the loudspeaker 10. The
tator 20 is mounted as close to the top 1.5 as possible. This mounting forces the tweeter 20
nearly together on the top 15 and causes their exciters 21 to line up at an angle as shown in FIG.
70 with the mounting walls 11 and 12 mounted below and the tweeter 20 mounted as close as
possible to the top 15 and bridged by the tweeter 20 from a front point of the top 15 as shown
in FIG. 3 The distance d is approximately equal to * W in front of both connectors 20.
In essence, this allows the paired tweeter 20 to be clearly less broad than a single tweeter to
keep the sound source's appearance small and maintain steric consistency. As the listener moves
through the different positions of the opposite sides of the top 15, the external dimensions of the
paired tutors 20 do not increase or decrease. Closely juxtaposed fixtures 20 at the top 15 do not
generate a frequency according to the interference pattern. Frequencies depending on the
interference pattern will occur if the tweeter 20 is located on opposite sides of the axis of the
cabinet. The flatter 20 is preferably flat acoustic over a wide angle so that the acoustic response
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is flat over a wide angle on either side of the apex 15 rather than emitting sound in a relatively
narrow directional beam. Have a response. In order to accomplish this, the locators 20 preferably
maintain their acoustic intensity at a frequency of up to 12,000 Hz, in an arc of 120 ° in the
horizontal plane. This provides sufficient acoustic intensity over the arc of 240 ° around the top
15. This is a much wider acoustic pattern than could be obtained by conventional loudspeakers,
yet maintain a small profile sound source and maintain three-dimensional consistency. The
attachment of the woofer 25 to the attachment walls 11 and 12 is similar to the attachment of
the tweeter 20, and the woofer 25 is also attached to the top 15 as close as possible. The larger
exciters 26 of the woofer 25 will cause the woofer 25 to interfere with each other if both woofers
25 are pushed down all the way to the top 15. Therefore, one woofer 25 is slightly spaced from
the top 15 as shown in FIG. This would not be necessary for all woofer 25 designs. The woofer
25 is then pushed close to the top 15 as far as possible. When one woofer 25 has to be spaced a
small distance from the top 15, in this embodiment the stereo pair outboard of the loudspeaker
10 is used in this embodiment in order to avoid interference of the exciters of the juxtaposed
woofer 25. The woofer 25 is selected as being spaced from the top 15. In most listening areas,
the external woofer 25 sound is reflected off the way wall to the listener, so if it is absolutely
necessary when the woofer is separated from the top 15, the outer crotch woofer By selecting,
less distortion occurs.
As with the tweeter 20, the distance bridged by the pair of woofers 25 from a point of view in
front of the top 15 is approximately equal to the frontal width W of each woofer 25. The woofer
25 is likewise chosen to have uniform acoustic intensity over a wide angle on each side of the top
15. Because a single-tator signal excites both the tweeters 20 and a single woofer signal excites
both-7725, the tweeter 20 pair and the woofer 25 pair have a larger output than the single
tweeter or woofer can handle Can handle This allows the loudspeaker 10 to handle higher power
signals and produce sounds of greater acoustic strength. At the same time, the small outlines of
the pair of tweeter sources and the pair of woofer sources maintain stereo-dispersivity, and the
stereo effect of the listening area between the stereo pairs of the loudspeaker 10 and over the
stereo pairs is excellent. In this example, it is chosen that the tweeter 20 and the woofer 25 be
used without an intermediate loudspeaker and that a single crossover (crossover) can be made in
the acoustic signal. Listening tests have shown that the distortion generated by a single crossover
between the tweeter and the woofer is less than the distortion of the two crossovers between the
tweeter, the middle loudspeaker and the woofer.
[0002]
Brief description of the drawings
[0003]
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1 is a front view of a preferred embodiment of the top loudspeaker of the present invention, FIG.
2 is a top view of the loudspeaker of FIG. 1, and FIG. 3 is a line 3 of FIG. 4 is an enlarged crosssectional view of the loudspeaker taken along line 4-4 of FIG. 1 showing the installation of a pair
of woofers.
10 · · · · · · · · · · · · · · · · loudspeaker (loud cabinet), 11.12 · · · mounting wall, 15 · · · top, 16.17.1 B · ·
· · · · · · · · · · · · · · · · · · excitation , 25 ... woofer. Amendment to Procedure 1 Patent Application 1
year Patent Application No. 282827 2, Loudspeaker 3 whitening the title of the invention,
Relationship with the case making correction Patent applicant address name Soundwave fibility
Corporation Agent residence Otemachi 2-chome, Chiyoda-ku, Tokyo 2-2 New Otemachi Building
206 Ward 5, Target of Correction
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