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Title of the Invention: High fidelity voice reproduction system +1) An outwardly projecting baffle
surface and a large number of closed hollows lli provided so as to intersect the baffle surface at
substantially the same size opening. Enclosure and baffle assembly and each such that the
dividers are located in the openings! ! Constructed from the same number of medium-sized
loudspeakers as the cavities arranged one by one each of mK, each of the loudspeakers tenclosure, baffle, assembly, Kl! By setting the opening ts'ts, the back surface of the diaphragm is
moved into the cavity, and the loudspeakers tri-electrically coupled so that a common input
signal can be reproduced simultaneously. Fidelity voice reproduction system. (Support) A large
second subject including a plurality of first ovRs, each of which includes an outer projecting
baffle surface and the opening, in which each of the enclosure / bakful assembly accommodates
one loudspeaker to form one module. Claim 1 (1) according to claim 1 (1), characterized in that
the module 'tm second enclosure is added so that the loudspeaker is located within the first
opening. Fidelity voice reproduction system.
2 Claims
DETAILED DESCRIPTION OF THE INVENTION The summary of the invention concerns the
combination of the loudspeakers, the first enclosure (@ Ho1OIur @) of the individual
loudspeakers, and the enclosure or baffles of jI2 for the entire loudspeaker group. Ru. The
loudspeakers preferably have the same size, which is also true for the first enclosure. While other
configurations may be effective, the individual first enclosures are preferably formed as spherical
national bodies made of metal, glass or other rigid materials such as rigid and rigid, and their
diameter is Two to three times the diameter of the loudspeaker depending on the application.
Each first enclosure is provided with an opening S, and the loudspeaker is mounted in the
opening so as to completely close the opening. A lidded opening may be provided to allow access
to the loudspeakers and wiring, but in any event the first enclosure is placed in a substantially
airtight manner. $ Z (D enclosure is preferably formed as a spherical national body similar to the
first enclosure, but its diameter is larger than that of the first enclosure), and the material is
preferably a hard material similar to the first enclosure . Attach all of the JlltDli & loudspeaker
modules to the second enclosure fence, with the loudspeaker in contact with the large-diameter
hot envelope spherical enclosure. Thus, at least two, preferably four or eight, modules of the
second enclosure are attached. As the number of modules increases, the response at low
frequencies also increases accordingly. The second enclosure has two purposes, one of which is
to mechanically support the module, and the other is to prevent distortion. That is, since the large
diameter spheres act as a common baffle, the wave fronts emitted by some loudspeakers may
collide with each other around the individual enclosures t-, thereby causing undesirable
harmonics that are not present in the original sound, There is no possibility of generating
subharmonics, sum frequencies and difference frequencies, and they are unified into one
common wavefront. The size of the second enclosure is preferably as hot as possible in light of
the application. Loudspeaker modules store on walls within large diameter enclosures so that
they are in close proximity but do not touch each other, but in view of this condition, the second
enclosure may be, for example, 4 modulars in a room of average household size. The size may be
large enough to accommodate all the seven dies, ie, a diameter of about 21/2 feet) (750 II) or
more. It can not be overemphasized that the larger the second enclosure can be accommodated if
the size of the room is wide, e. It is said that such an audio reproduction system can provide a
constant level of loudness response characteristics over substantially the entire audible range of
frequencies. The advantage is Ih), which is the case even if the shape of the first enclosure is
different from the ideal spherical shape.
There is no need for a crossover network and no peaks or dips appear in the loudness response
at mid frequencies. The present invention relates generally to the area of sound # devices, and in
particular to loudspeakers and their assemblers. These assemblies constitute the terminal unit of
the audio reproduction system with one or more audio amplifiers as the penultimate unit Y, and
the original audio to be reproduced is recorded or reproduced, or a direct broadcast reception
system or a calling system It goes without saying that it is possible to include discourse, music,
and so on, regardless of whether it can be obtained through The present invention seeks to
reproduce the original audio in full fidelity at all audio frequencies and in all directions from the
audio reproduction system, both for loudness and for the phase of the input signal. A directradiating loudspeaker mounted on a much larger spherical EndPage: this means that it has
excellent loudness characteristics over almost the entire audio frequency, at least in the axial
direction of the loudspeaker. It has been known for a long time and was published in January
1969 [The Journal of the Audio Engineering Society J (Th @ Journalofth @ Auaio11! mginssdng
9oo 1 et 7) Barry F. Olson (H Turtle 1ryF, 01son), article “Direct Radiator LoudspeakerEnclodure ('i ** Radiated Loudspeaker), published on pp. 22-29 of Volume 1
(DeraatRadiatorLoulspeak @ r1lnalosures). A similar module to this is disclosed in U.S. Pat. No.
3,026,955 issued to Wilbur (Wllb @ r) in 1962. However, Wilbur insists that it is possible to use
several loudspeakers in combination with a single spherical body. Although Wilno (-fully
discloses applying a sound absorbing lining to the circular surface of a spherical national feature,
it was later noted that the requirement for this attachment 211 is unnecessary. In spite of such
an example, the loudspeaker / spherical one-body module is not commercially available, is not
adopted for sound reproduction or system, and the spherical enclosure is commercially available
or adopted separately from the loudspeaker itself. Not even. Furthermore, such combinations of
mozzieres are not yet known combinations of the same size but also different sizes, and are
similar to mozzieres employing enclosures other than spherical national bodies. In order to
obtain high fidelity sound reproduction, the reproduced sound reaching the listener's ear must
have three characteristics.
First, the magnitude of the sound at each frequency, which is usually present in complex sound
waves, must have the same relationship to the other S-wave numbers as exists in the original
speech. Second, the nature of the speech must not change. In other words, the combination of
frequencies in the original speech must still be present at the time of listening; Thirdly, in the
speech to be heard, not all components of the original speech but some components time)! !
There should be no distortion caused by spreading. That is, there should be no phase shift in the
sound to be heard 4L. Expressed negatively, in order to obtain high fidelity reproduction,
suppression of the original component of the original voice, resonance or increase of other
components, mixing of unauthentic, undesirable voice, combination of the above factors, etc. The
absence of any kind of distortion is the essential condition. In addition to the above conditions,
good audio reproduction is relatively non-directional, and reproduces the original audio sound
faithfully in almost any direction from the audio reproduction source. This condition is not
necessarily uniform throughout the physical environment, and 360 ° dispersion is required in
circular theaters and stadiums, whereas this is the case when the stage is sounded in a
parallelepiped theater. ) It may be quite narrow. Such conditions are not satisfied by the currently
used audio reproduction system. The best nine speech reproduction systems currently spoofed
are combined by a low frequency loudspeaker (woofer) and a high frequency e loudspeaker H
(tweeter) t-crossing network, and a high frequency loudspeaker in series with a high pass filter
By arranging low-frequency loudspeakers in series with low-band filters, respectively, the speech
components above the "crossing" frequency pass almost all small-sized high-frequency
loudspeakers t-pass while the "crossing" frequencies are below Is configured to pass almost all
the low frequency loudspeakers. In many cases, an intermediate frequency loudspeaker is also
used with the second crossover network. Even in the best known sound reproduction systems,
phase distortion at the crossover frequency is inevitable and in most cases dips in the loudness
response characteristic appear. The audio to be heard is not a faithful reproduction of the
original audio, since both the cross component and the transducer (loudspeaker) cause some sort
of distortion t. Furthermore, many of the known regeneration systems are very uni-directional
and give excellent results for listeners who are in a very narrow position, for example at a
midpoint between two loudspeakers. Also, a feature of known audio reproduction systems is low
frequency drop off. That is, low frequencies are suppressed or attenuated while relatively high
frequencies pass at a level that approximates the original loudness level.
The main object of the present invention is to provide a high-fidelity audio reproduction system
EndPage: 3 without the drawbacks found in known audio reproduction systems. Another object
of the present invention is to provide high fidelity that exhibits excellent amplitude and
frequency characteristics over the entire audio frequency band with no drop off at low
frequencies, no peaks and no resonance points at specific frequencies. To provide an audio
reproduction system. Still another object of the present invention is a high fidelity audio
reproduction system which is omnidirectional and achieves high fidelity reproduction similar to
the axial direction at nine points apart from the axial direction of the reproduction system. It is to
provide. Another object of the present invention is to provide a high fidelity 1IIIL speech
reproduction system utilizing known O loudspeakers and discrete rigid modules, in particular
spherical national bodies or enclosures having a similar shape thereto. A further object of the
present invention is a standard which unifies the 10th and loudspeakers of each Moziere in
exactly the same t and significantly reduces the manufacturing cost of the reproduction system
as compared with the known woofer / twister combination system. It is an object of the present
invention to provide a high fidelity sound reproduction system using a chemical component. The
ToO @ of the present invention uses a loudspeaker of nearly the same size to reproduce any
audio frequency, and provides a high fidelity voice reproduction system that is neither electrical
nor mechanical, and does not employ any crossover networks. It is to do. Another object of the
invention is to take advantage of the superior properties of a smaller loudspeaker than a woofer
by adopting only this smaller loudspeaker, the strength and vibration-freeness of a linear
enclosure superior to square. It can be used as the material of the second enclosure, or as a
material of the second enclosure, so as to be able to use the characteristic tg and to
accommodate the lighting device for producing novelty and aesthetic effects. In the present
invention, a standard module is adopted which adopts the same first size and uniform
loudspeakers which are identical to each other in all respects, for example, 9 inches in diameter
(230 m1> in pre-cored (1) l xiglam) 11 kON A moving coil loudspeaker with a diameter of 4
inches (10 (j)) is used. The most preferred loudspeaker is a friend made according to the
construction shown in another% patent application of Motoyama pus, for example Harald
Electronics Company (Chicago, IL) (Iarola) 11 @ otroni + sOOmpanyof Ohloago, Commercially
available loudspeakers tf !, such as a 4 in. Bartode 424A, which is 71 in the construction of the
(111 moLa).
You may use it. This loudspeaker employs a paper cone which is vibrated by a voice fill floating
in the gap of a fixed electromagnet, and has an impedance of 8Q, a Mtft input of 5v and a peak
power rating of 151. This loudspeaker is formed on a 9-inch (23C11), 11-thick, 3 / 16-inch (0,
53) plexidas sphere and attached to the 9-opening, with the il-opening fully sealed. Install the
loudspeaker ilk as done. It is a fact already known to the inventor that attaching two or more
loudspeakers to a single first enclosure is extremely disadvantageous. It is known that the
loudspeakers of 2 @@ are connected in series or in parallel. (Or three or more if coupled to a
straight line ^) K regardless, whether it is driven by the same amp or 1 @ by the different amps, 1
if it is the size and frequency of the sound There is no change in the characteristics that are
worse than in the case of a single loudspeaker and enclosure. In particular tests, it has been
found that the loudness response characteristics are significantly worse for frequencies below
800 Hz when using two or more loudspeakers for each enclosure and mourning. It is believed
that this result is due to the interaction of the backward sound waves formed in the enclosure
from the back of the loudspeaker diaphragm. The air flows also collide with each other and
induce electromagnetic interactions that extinguish each other at low frequencies. Such a
collision action may be considered as not to appear in the spherical enclosure *, @, and in the
listener 111 located in the outer part of the spherical enclosure, but as a result contradicts with
this assumption. The spherical enclosure ff 1 K-generated interactions feed back to the signal
source and to the current delivered via the voice coil, and thus to the air flow constituting the I
11 noise at the outer surface of the vibrating diaphragm There is no doubt that it causes a kind
of distortion. In short, two or more loudspeakers' ill in each enclosure! There is no economics in
using it, but rather it is wasteful to add the second and third loudspeakers to the first
loudspeaker. EndPage: 4 <degrading the performance of the first loudspeaker become. The
inventors have found that by combining two or more modules, each consisting of a loudspeaker
and a separate first enclosure, and attaching them to a common panfull, a synergy effect is
obtained. The baffle may be curved to a spherical surface having a diameter several times the
diameter of the first enclosure, although directionality is improved. You may form as a mere flat
wall. The provision of the common baffle and the increase in the number of modules also
contribute to the improvement of the fidelity of the response characteristic in the low frequency
The whole idea described above is incorporated into the structure consisting of a number of
loudspeakers / first enclosure modules arranged on the wall of a large enclosure, preferably a
sphere or an enclosure that forms a sphere or more that is larger than the first enclosure. Both
the first enclosure and the second enclosure are preferably spherical national bodies made of
hard material such as metal, glass or rigid plastic. The loudspeakers are connected to a common
output amplifier so that the same power is supplied to any loudspeakers, and since the individual
loudspeakers are identical to one another, they have a positive impedance to the amplifiers.
Therefore, it is not important whether the wires are in parallel, in series or in series-parallel. The
individual modules are mostly located inside the larger scoop wall and the loudspeaker
diaphragm is arranged to form a tangent (or chord) to the enclosure. The modules are preferably
arranged close to one another but not in contact, each pointing in a different direction. This
arrangement of the mozillas results in the omnidirectionality of the overall regeneration system,
and the common baffle formed by the larger enclosure also contributes to this omnidirectionality.
Hereinafter, the embodiment of the present invention will be described according to the attached
drawings. In the preferred embodiment illustrated in the / / / / '/' / '/ 1 /' j I 1 through w I s
drawings four separate modules 10 with loudspeakers 14 and 14 by means of common second
ONs 400 wall C Spherical national body 12 is, for example, V-inch (0,5 am), diameter-! An Ix4y +
(men) D loudspeaker consists of a rigid material such as 9 inches (23 C1 m) to U inches (7: 1
c11) (D, glass or rigid plastic). It is sufficient if the enclosure made of the hard material consists
of the above-mentioned hard material and is constituted of the large spherical national body 42,
and its average area of IIIIK is set to 11 fl straight, for example 2 1/2 feet (75 C 11 m) to 3 feet
(9 billion) It is good. The smaller spherical national gear 12 has a front opening that receives the
loudspeaker 14ft and a rear opening that is defined by the upright projection 116. The centering
portion 16 is provided with a cap for closing the opening, and a pair of metal terminals 20 is
provided. The outwardly projecting & I 1 min of the terminal part connects with the lead n and
the lead from the other loudspeaker respectively, and in the sphere lead n, at the opposite end of
23 the loudspeaker via the loudspeaker connection point n and 34 ' Audio file I is connected to a
pair of wires 謳 and 4 respectively.
The loudspeaker receiving opening of the module b is provided with a square projection 38t
which is thicker than the other parts, into which an opaque hole is drilled at its four corners and
an internal thread is cut. The second enclosure wall 42 is also drilled with holes corresponding to
the above-mentioned opaque holes, and the two enclosures and the loudspeaker are connected
by means of a plurality of threaded connection members, for example machine screws I. In order
to prevent the transmission of sound through the enclosure 1 and to seal the loudspeaker so that
air does not flow from the inside of the first enclosure to the space in front of the assembly, a
pair of gaskets 24t- Because. It should be noted that in assemblies where minimal air leakage is
present, the walls of the first enclosure 120 may need to have micro-apertures of IA 6 inches or
less in diameter. The purpose of this micropore (not shown) is to allow air flow as much as
necessary for the air pressure within the io enclosure to self-regulate, according to the ambient
pressure and its changes. Generally, a loudspeaker commercially available today does not require
such a measure, but if it is a very airtight loudspeaker, it is necessary to provide a pressure
control hole 1 such as a kernel. The second enclosure 40 has many rear sections EndPage: 5
open, but the micropores may be provided in the wall 42 if it is fully closed or sealed against the
wall. A loudspeaker 14Fi, after fixing 1 gnett, an audio film (not shown) operating within an Fgap formed in the partial volume of the magnet, and fixing a truncated top surface to one end of
the audio coil (9) A conventional dynamic type comprising a cone diaphragm and a flexible
support 37. 39 respectively provided at the outer and inner ends of the diaphragm to moveably
fix the diaphragm 36 to the metal frame 41 of the loudspeaker. Good. As shown in a simplified
manner in FIG. 5, one set of four loudspeakers may be electrically coupled by a series-parallel
circuit configuration as shown. The upper two and the lower two are connected in parallel with
each other, and these upper and lower two pairs are further connected in series, so that the
combined impedance connected to the audio amplifier via the conductor IJ 128 and the rod is a
single loudspeaker Equal to the impedance of Since this has the same impedance 1 it is possible
to use the exact same loudspeaker. As shown by solid lines in FIGS. 2 and 3, it is possible to wire
metal wires through the back-to-mouth portion of the first enclosure, but as shown by broken
lines 47, 48, 49 and (source) in FIG. The voice coil can also be wired through the front opening of
the enclosure 10. Show another embodiment. In the embodiments of FIGS. 6 and 7 the individual
loudspeakers are arranged in a closed space preferably of a spherical back, and in the
embodiments of FIGS. 8 and 9 are preferably curvilinear or A large common enclosure with an
external abutment surface without sharp edges is a full frontal fit of all the diaphragms.
In the embodiment described above, the individual loudspeakers were connected to the small
spherical national bodies 12 to form individual modules 10, which were attached to the larger
spherical national bodies. However, a part or all of the first enclosure housing the individual
loudspeakers may be constituted by the above-mentioned member b by making the member tube
constituting the larger one of the national bodies sufficiently thick. In the embodiment shown in
FIGS. 6 and 7, the entire enclosure 52 is composed of an inner sector (5ector) 54 and an outer
spherical knuckle panel, and a large number of hemispheres in the inner sector. A group of
shaped cavities is formed, and an equal number of hemispherical cavities i are formed in the
outer spherical national body 56. These cavities are of course of the same diameter and are
arranged such that, when the two parts, i.e. the inner sector 8 and the outer spherical body 56,
are joined, the corresponding cavities and i coincide with one another. Loudspeaker 14 may be
directly applied to the wall of the outside world as shown. The various conductors 59, 59, 60, 61
of the loudspeaker may be wired as in the first embodiment described to the first enclosure, to
the internal corrosion of the shell and to the terminals provided on the rear cap, or It may be
embedded in the material that constitutes the wall as shown. Although not shown in detail, in
such wiring, by adopting a jack plug mechanism that also serves as means for centering the two
parts of the enclosure when the two parts are joined, Electrical bonding may be performed at the
interface of the two parts. In the embodiment shown in FIGS. 6 and 7, although complementary
cavities 62 to 65 are formed in the inner sector and outer shell 111 at the time of manufacture,
these complementary cavities are simply lighter, thus reducing the total loss of the assembly. Is
its purpose. The overall enclosure 66 in the embodiment of FIGS. 8 to 10 is an application of the
two embodiments described above, and the outer spherical national body 56 is that of the
embodiment of FIGS. 6 and 7. There is a separate hemispherical figure behind it to form a
separate first enclosure respectively. The individual hemispherical body 68 is fitted with the
outer portion 72 in an annular ship wrap (5 bip'lap) manner as shown in FIG. As in the previously
described embodiment, the hemispherical cavities are joined to form a closed f 'spherical cavity
in which the back of the diaphragm 14 is moved. As with the loudspeaker leads 74-78F'i, they
may be threaded through the cap or may be recessed into the wall of the enclosure and
withdrawn backwards.
Fig. 1, Fig. 12 and Fig. 13 show that there is no limit to the number of loudspeakers supported by
a common baffle or ti second enclosure; preferable. In this embodiment, eight loudspeakers and
spherical pressure modules are supported on the common page EndPage: 6, and the common
baffle 82Fi preferably has a curvilinear form, specifically, a sphere having a large diameter. . This
embodiment is similar to the embodiment shown in FIGS. 1-5, except that a relatively large
common baffle 82 is employed. If the space is tight, the end of the baffle core 1 may be
configured as shown by a broken line. In FIG. 14, curve 90 shows the typical loudness response
characteristics of a known audio reproduction system using a woofer, tweeter and an
intermediate frequency loudspeaker, as is apparent from this curve. Have shown critical dips 91
and 92 'at about 2,000 Hz and 5,000 Hz gK corresponding to the crossover frequency. Curve 95
tf, showing the test results obtained with the above-described voice reproduction system using
eight 5 inch (12, 7 em) loudspeakers as illustrated in FIGS. 1 to 1, as is apparent from this am , Is
substantially flat across the audio frequency range. With regard to the first enclosure of the
present invention, it does not deviate from the scope of the present invention even if the entire
enclosure having a precurved shape such as a bowl surface, an ellipsoidal surface or the like is
adopted. It is undeniable that the spherical shape is most preferable, but the concept of housing
one loudspeaker to form one module in one space with other shapes and operating the same or
almost the same module in series The embodiment combined with the concept contributes to
achieving excellent effects in any embodiment. It is a structure for bonding all modules to the
second enclosure or baffle, and preferably has an outwardly projecting shape and a large size. As
the external projecting shape, a curved shape is preferable. However, for example, if a shape such
as a polyhedron is adopted and it is considered that an intersecting portion between faces does
not form an acute angle portion which tends to cause distortion ON, the purpose of the present
invention It does not deviate from the BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a
perspective view of a preferred embodiment of the present invention showing four loudspeaker
spherical knuckle modules disposed in a second enclosure consisting of square portions of a
large spherical knuckle, FIG. Is a plan view of the 5 @ embodiment taken in the direction of the
line 2-2 in FIG. 1; FIG. 5 is an enlarged longitudinal sectional view of one module, and an
enlarged front view showing one module in the direction of 4-4 @ in FIG. 4 #i except for the
second enclosure, FIG. 5F F 14 loudspeakers t--a simplified scaled back view of the first
illustrated embodiment with wiring states added to illustrate one way to combine in common
audio amplifier Fig. 6 ri Takes a thick second enclosure which also constitutes a separate first
enclosure for the four loudspeakers. 7 is a cross-sectional view of the embodiment of FIG. 6 of 779 in FIG. The second enclosure that constitutes the outer part of the second and the individual
hemispherical tube that constitutes the back part of the first enclosure, the M2 modified type
combined with the first enclosure and the 'IJ2 enclosure and t Is a slope view of the #!
Figure 8 is a cross-sectional view of Example 8 illustrated in Figure 8 at 9-9, and Figure w
constitutes the individual hemispheres of the first enclosure as the remainder of the first
enclosure. FIG. 8 is a partial cross-sectional view of the embodiment of FIGS. 8 and 9 showing the
manner in which it is fitted into a common second enclosure, and FIG. 11 is an 81I loudspeaker
supported within the common second enclosure; Fig. 11 is a front view of a seven assembly
comprising spherical national modules, Fig. 11 is a rear view showing the assembly of the eight
bond loudspeakers together with a simplified series I / F, Fig. 11 is Fig. 11 And FIG. 14F is a
graph showing the loudness response characteristics of the all-in-one loudspeaker system and
the embodiment of the present invention. Force ... individual module, W ... spherical national
body, 14 ... loudspeaker. (Material) ... voice coil, 蕊 ... partition, u, 3B ... flexible support,
chrysanthemum ... second frame, desired 9% ... overall enclosure,% · · · · Outer spherical national
body, · · ·-hemispherical cavity, feather · · · common bacful patent applicant Earle, Jie, Stingling
Kanban-, Ikapo V Ted Attorney attorney Satoru Yoshimura EndPage: 7 Figure 2 End Page: 8
Figure 8 End Page: 8 9 Fig. 10 End Page: 9 Procedure Amendment (Method) January, 1976! 1%
Persuasion Agency Secretary Katayama Ishibe 1 1, display of the case 58/51 Patent application
No. 101024 2 name of the invention High fidelity voice reproduction system 3 of the person who
makes correction EndPage: 7 Fig. 2 End Page: 8 Fig. 9 Figure 10 EndPage: 9 procedure
correction book (method) January, 1976! 1% Persuasion Agency Secretary Katayama Ishibe 1 1,
display of the case 58/51 51 patent application No. 101024 2 name of the invention High
fidelity voice reproduction system 3 In relation to the person making correction Percent change
Applicant 7- Bu河 ス ト ス ト ス ト ス ト ン グ ス ス ス ス ス ス ス ス ス ス ス ス ス − ス − fi-f
イ 千 千 、 ス ミ ス ス ミ ス 仏 仏 If If If If If If If If 161If Ii L 砧 951-1181 (5960) Patent
attorney Yoshimura Satoru S, correction # poor 8 additional 51 year IO month day 6 subject to
stop 6 in 1-person address, letter of residence, letter 2 of the correction 8 valleys of the valley
sheet p * 蕾, letter of residence 1 And we will correct it. EndPage: 10 Figure 2 EndPage: 11
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