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JPH06303687

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DESCRIPTION JPH06303687
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device, and more particularly to a speaker device for reproducing bass.
[0002]
2. Description of the Related Art Conventionally, as a method for improving the reproduction
characteristic of the low frequency range in a speaker device, a circular or rectangular cylindrical
duct opened in a baffle surface is provided in a cabinet to which a speaker unit is attached. 2.
Description of the Related Art A bass reflex type speaker device is used in which a sound wave is
resonated, phase-reversed and emitted from a duct.
[0003]
[Problems to be solved by the invention] In this bass reflex type speaker device, it is difficult to
enhance the low frequency range when the cabinet is miniaturized, and the stiffness of the
cabinet is increased particularly when the cabinet is made thin. Therefore, it becomes difficult to
reproduce the low frequency range.
[0004]
The present invention has been made in view of the foregoing, and it is an object of the present
invention to provide a speaker device in which sound waves radiated from the front of a speaker
are high-cut to improve the reproduction characteristics of the bass range.
01-05-2019
1
[0005]
SUMMARY OF THE INVENTION In order to achieve the above object, the speaker apparatus of
the present invention is configured by arranging a high cut filter on the front side of the speaker
unit.
[0006]
An acoustic pipe is provided in a cabinet to which a speaker device provided with the high cut
filter is attached.
[0007]
In addition, a bass radiator is provided in a cabinet in which the high cut filter is disposed and the
speaker device is attached.
[0008]
Further, an acoustic pipe and a bass radiator are provided in a cabinet for mounting a speaker
device having the high cut filter.
[0009]
As described above, by arranging the high cut filter on the front side of the speaker unit, the
speaker device of the present invention lowers the bass resonance frequency f0, extends the low
frequency reproduction band, and lowers the high frequency characteristic. You can get a rich
sense of volume in the low range.
[0010]
Attaching the speaker device to a cabinet provided with an acoustic tube or bass radiator further
enhances the bass range, and attaching it to a cabinet provided with an acoustic tube and a bass
radiator enhances the bass range to enhance the bass range. You can get a sense of volume.
[0011]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the
present invention will be described with reference to the drawings. First, a first embodiment will
be described with reference to FIGS.
01-05-2019
2
[0012]
In FIG. 1, 1 indicates the whole of the speaker apparatus of the first embodiment, 2 is a speaker
unit, 3 is a cabinet, and a high cut filter 4 is attached to the front side of the speaker unit 2. Is
mounted on the front surface of the cabinet 3, ie, the baffle surface 3a.
Further, a duct 5 as an acoustic pipe whose front end opening 5a opens to the baffle surface 3a
is built in the cabinet 3.
The high cut filter 4 attached to the speaker unit 2 of the speaker device 1 is fixed to the frame
2b, as shown in FIG. 2, on the front side of the speaker unit 2, that is, in front of the diaphragm
2a.
[0013]
The high cut filter 4 is constructed by combining a small diameter cylinder 4L having a small
cross sectional area and a large diameter cylinder 4C having a large cross sectional area, the
small diameter cylinder 4L having an acoustic mass and the large diameter cylinder 4C having an
acoustic compliance.
[0014]
In this embodiment, a flange 4a having a diameter slightly larger than the diameter of the frame
2b of the speaker unit 2 is provided at the rear end opening of the small diameter cylinder 4L,
and fixed to the end of the frame 2b at the flange 4a. It is
The equivalent circuit of the speaker device 1 configured in this way is the acoustic mass portion
L4 of the small diameter cylinder 4L of the high cut filter 4 and the large diameter cylinder 4C in
parallel with the compliance C3 by the volume in the cabinet 3 in the bass reflex type speaker as
shown in FIG. And the acoustic compliance C4 of
In this equivalent circuit, S is the speaker portion, and L5 is the acoustic mass of the duct portion.
01-05-2019
3
[0015]
The output sound pressure frequency characteristic of the speaker device 1 is as shown by the
solid line a in FIG. 4 and the bass resonance f0 is changed from approximately 180 Hz to
approximately 150 Hz of the conventional frequency characteristic (dotted line b) by the acoustic
mass L4 of the high cut filter 4 As a result, the reproduction band of the low band is extended,
and the frequency compliance of 1 kHz or more is lowered by the acoustic compliance C4 of the
high cut filter 4 so that it is possible to radiate a bass having a good sound quality.
[0016]
In the speaker device 1 of this example, by filling the sound absorbing material in both cylinders
4L and 4C of the high cut filter 4, the bass radiation effect can be further improved.
[0017]
Further, by increasing the number of stages of the small diameter cylinder 4L and the large
diameter cylinder 4C of the high cut filter 4, the radiation effect of the bass region can be further
improved.
That is, as shown in FIG. 5, the small diameter cylinder 6L is joined to the front end opening of
the large diameter cylinder 4C in the configuration shown in FIG.
Due to the coupling of the small diameter cylinder 6L, as shown in FIG. 6, the acoustic mass L6 is
added in parallel to the acoustic compliance C4 of the high cut filter 4 as shown in FIG.
[0018]
Further, as shown in FIG. 7, the large diameter cylinder 6C is joined to the rear end opening of
the small diameter cylinder 4L in the configuration shown in FIG.
By combining this large diameter cylinder 6C, as shown in FIG. 8, the compliance C6 with the
acoustic compliance C4 is added in parallel with the compliance C3 due to the cabinet volume as
shown in FIG. Be done.
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4
[0019]
In the speaker apparatus of this embodiment, the front end opening 5a opened in the baffle
surface 3a is narrow as shown by a two-dot chain line in FIG. By forming the rear end opening 5b
into a wide tapered tube, the radiation speed of the bass is increased, and a crisp bass is emitted.
[0020]
Next, the speaker apparatus 11 of the second embodiment shown in FIG. 9 has the high cut filter
13 attached to the front side of the speaker unit 12 in the same manner as the first embodiment
described above. A duct 15 having an outer end opening 15a opening on the front side, ie, the
side of the baffle surface 14a is formed on one side, and the speaker unit 12 is attached to the
baffle surface 14a via the high cut filter 13 and the duct 15 A bassive radiator 16 as a bass
radiator is installed on the side surface of the inner end portion 15b.
[0021]
Further, the speaker device 21 of the third embodiment shown in FIG. 10 is provided with two
speaker units 22 and 23, and high cut filters 24 and 25 are attached to the front sides of the
respective speaker units 22 and 23. A duct 27 is formed in one side of the cabinet 26 to which
the speaker units 22 and 23 are attached, and the outer end opening 27a opens to the baffle
surface 26a side, and the first speaker unit 22 is via the high cut filter 24. The second speaker
unit 23 is attached to the side surface of the inner end portion 27 b of the duct 27 via the high
cut filter 25.
[0022]
The speaker device 31 of the fourth embodiment shown in FIG. 11 is also provided with two
speaker units 32 and 33, and the cabinet 34 has an outer end opening 35a at one side as in the
second and third embodiments. The first speaker unit 32 has a high cut filter 36 attached to the
front side and is attached to the baffle surface 14 a of the cabinet 14 through the high cut filter
36. The second speaker unit 33 is attached to the duct 35 correspondingly to the inner surface
side of the bass radiator 37 attached to the side surface of the inner end 35 b of the duct 35.
[0023]
Also in the speaker apparatus according to the second to fourth embodiments configured as
described above, the speaker unit has the high cut filter attached to the front side and is attached
to the cabinet via the high cut filter, and thus the low frequency range is obtained as in the first
embodiment described above. The radiation effect is improved, and by providing the duct with a
01-05-2019
5
bass radiator, the bass range is further improved.
[0024]
Further, the speaker device 41 of the fifth embodiment shown in FIG. 12 is mounted on one side
surface of the tapered hollow body 44 which is built in the cabinet 43 and opened on the baffle
surface 43 a side. An opening 45 is formed in the back surface 43b.
The hollow body 44 contained in the cabinet 43 is formed in a forward narrow taper shape in
which the sectional area S1 of the outer end opening 44a is small and the sectional area S2 of the
inner end 44b is large. The hollow body 44 has a high cut filter for the speaker unit 42.
[0025]
Thus, in the present embodiment, the hollow body 44 is formed in a tapered shape so that the
speaker radiation sound passing therethrough has a cross-sectional area S1 of the outer end
opening 44a and a cross-sectional area S2 of the inner end 44b. The radiation rate is increased
by the ratio S2 / S1 and the bass is improved with crisp noise.
[0026]
The speaker apparatus 51 of the sixth embodiment shown in FIG. 13 is provided with the two
speaker units 52 and 53 in the above-mentioned fifth embodiment, and is incorporated in the
cabinet 54 and has an outer end opening with a small cross section S1. 55a is opened in the
baffle surface 54a, and the inner end 55b is attached to the tapered hollow body 55 of large
cross-sectional area S2 with the first and second speaker units 52 and 53 facing the both side
surfaces In this example, the tapered hollow body 55 constitutes a high cut filter for both
speaker units 52 and 53.
[0027]
Further, in the present embodiment, first and second openings 56 and 57 are formed in the back
surface 54b of the cabinet 54 corresponding to the first and second speaker units 52 and 53,
respectively.
[0028]
Also in this embodiment, the same effect as that of the fifth embodiment can be obtained.
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[0029]
The speaker apparatus 61 of the seventh embodiment shown in FIG. 14 includes two speaker
units 62 and 63 as in the sixth embodiment, and the cabinet 64 is different from the fifth and
sixth embodiments in reverse. A tapered hollow body 65 is incorporated, and the first and second
speaker units 62 and 63 are attached to the hollow body 65.
[0030]
That is, the hollow body 65 is formed in a reverse tapered shape in which the cross-sectional
area S1 of the outer end port 65a opened to the baffle surface 64a of the cabinet 64 is large and
the cross-sectional area S2 of the inner end 65b is small. A closed plate 66 having a smalldiameter central opening 66a is installed on the outer end port 65a side of the hollow body 65,
and the high-cut filter for both speaker units 62 and 63 is formed by the reverse tapered hollow
body 65 and the closed plate 66. Configure.
[0031]
Further, in the present example, an opening 67 is formed in the back surface 64 b of the cabinet
64.
[0032]
The bass is improved also in this example configured in this way.
[0033]
In the speaker device 71 according to the eighth embodiment shown in FIG. 15, the speaker unit
72 is narrow at one side of the cabinet 73 at the side of the baffle surface 73a, and the inner end
74b at the back 73b The narrow space portion 74 forms a high cut filter for the speaker unit 72,
which is attached to the inclined partition wall 75 forming the wide space portion 74.
[0034]
Further, an opening 76 communicating with the rear space of the speaker unit 72 is formed on
the back surface 73 b of the cabinet 73.
[0035]
The speaker unit 81 of the ninth embodiment shown in FIG. 16 has the speaker unit 82 at one
01-05-2019
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side of the cabinet 83, and the opening 84a on the baffle surface 83a side is narrow as in the
eighth embodiment described above. The inner end 84 b on the 83 b side is attached to the
inclined partition wall 85 forming the wide space 84, and the narrow space 84 constitutes a high
cut filter for the speaker unit 82.
[0036]
Further, a baffled surface 86a of the cabinet 83 is provided with a bassive radiator 86 as a bass
radiator located on the rear space side of the speaker unit 82.
[0037]
The loudspeaker apparatus 91 of the tenth embodiment shown in FIG. 17 has a duct as an
acoustic pipe in place of the bassive radiator 86 in the loudspeaker apparatus 81 of the ninth
embodiment described above.
[0038]
That is, as in the ninth embodiment, the opening 94a at the side of the baffle surface 93a is
narrow at one side of the cabinet 93 as in the ninth embodiment, and the space 94 is wider at the
inner end 94b at the back 93b. The narrow space portion 94 attached to the inclined partition
wall 95 to be formed constitutes a high cut filter for the speaker unit 92.
[0039]
A duct 96 as an acoustic pipe is attached to the baffle surface 93a of the cabinet 93 at the rear
space side of the speaker unit 92.
[0040]
In the speaker devices 71, 81, 91 of the eighth to tenth embodiments configured as described
above, the radiation speed of the radiation sound from the speaker units 72, 82, 92 is increased,
and a crisp bass is emitted Thus, the bass is improved, and in the speaker devices 81 and 91 of
the ninth and tenth embodiments, the bass is further improved.
[0041]
The speaker apparatus 111 according to the eleventh embodiment shown in FIG. 18 has a
plurality of speaker units 112 in a cabinet 113, and in this example, two partition walls 114 and
115 arranged to form a first duct 116 and a continuous second module 116. A second duct 117
is formed and attached to the inner end of the second duct 117.
01-05-2019
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[0042]
That is, a first duct 116 having a narrow width at the opening 116a opening toward the baffle
surface 113a and a wide inner end 116b is formed by the first partition 114 at one side of the
cabinet 113. A second duct 117 is formed by the first and second partition walls 114 and 115.
The second duct 117 has a narrow front end 117a continuous with the inner end 116b of the
first duct 116 and a wide rear end 117b. 112 is mounted at the rear end of the second duct 117
and attached to the side of the second partition 115.
[0043]
The first and second ducts 116 and 117, that is, the duct formed of the two narrow portions and
the wide portions form a high cut filter for the speaker unit 2.
[0044]
Further, an opening 118 communicating with the rear space of the speaker unit 12 is formed on
the back surface 113 b of the cabinet 113.
The speaker device 121 of the twelfth embodiment shown in FIG. 19 has the speaker unit 122
attached to the side surface of the intermediate body 124 by attaching the tapered hollow body
124 to the cabinet 123 in the same manner as the fifth embodiment. In the present example, a
duct 125 as an acoustic pipe is attached to the other side of the hollow body 124.
That is, the hollow body 124 attached to the cabinet 123 is formed in a forward narrow taper
shape in which the cross-sectional area S1 of the outer end opening 124a opened to the baffle
surface 123a is small and the cross-sectional area S2 of the inner end 124b is large. The speaker
unit 122 is attached to one side of the middle body 124, and the duct 125 is attached to the
other side opposite to the speaker unit 122.
[0045]
The tapered hollow body 124 constitutes a high cut filter with respect to the speaker unit 122,
and constitutes a sound emitting cylinder in communication with the duct 125.
01-05-2019
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[0046]
An opening 126 communicating with the rear space of the speaker unit 122 is formed on the
back surface 123 b of the cabinet 123.
[0047]
The speaker device 131 of the thirteenth embodiment shown in FIG. 20 has the speaker unit 132
in the cabinet 133 in the same manner as the twelfth embodiment described above, and an outer
end opening 134a having a narrow width (small cross section S1) in its baffle surface 133a. An
open, inner end portion 134b is attached to a wide (large cross-sectional area S2) tapered hollow
body 134 and attached to one side of the hollow body 134, and in the present example, to the
other side of the hollow body 134 the bass radiation A bassiv radiator 135 is attached.
[0048]
Also in this example, the tapered hollow body 134 constitutes a high cut filter with respect to the
speaker unit 132, and constitutes a sound emitting part of the bassive radiator 135.
[0049]
An opening 136 communicating with the rear space of the speaker unit 132 is formed on the
back surface 133 b of the cabinet 133.
[0050]
Also in the speaker devices 111, 121 and 131 of the eleventh to thirteenth embodiments
configured as described above, the radiation sound of the speaker units 112, 122 and 132 is
radiated through the tapered space portion whose outer end opening is narrow. As a result, the
radiation speed of the radiated sound is increased, and a crisp bass is emitted to improve the
bass, and the bass is further improved in the speaker devices 121 and 131 of the twelfth and
thirteenth embodiments.
[0051]
The speaker device 141 of the fourteenth embodiment shown in FIG. 21 has the speaker unit
142 directly attached to the baffle surface 143a of the cabinet 143, and has the same structure
as the high cut filter provided in the first embodiment described above on the front surface of the
speaker unit 142. The high cut filter 144 is attached.
[0052]
01-05-2019
10
In addition, a tapered duct 145 having a smaller cross-sectional area S1 of the outer end opening
145a opened to the baffle surface 143a and a larger cross-sectional area S2 of the inner end
opening 145b is attached to the cabinet 143. A bassive radiator 146 as a bass radiator is
attached to 145b.
[0053]
The speaker apparatus 151 of the fifteenth embodiment shown in FIG. 22 has the high cut filter
153 attached to the front side of the speaker unit 152, and the speaker unit 152 is attached to
the baffle surface 154a of the cabinet 154 via the high cut filter 153.
[0054]
Further, in the baffle surface 154a of the cabinet 154, similarly to the above-described
fourteenth embodiment, the taper is such that the cross-sectional area S1 of the outer end
opening 155a opened to the baffle surface 154a is small and the cross-sectional area S2 of the
inner end opening 155b is large. The high-cut filter 156 is attached to the inner end portion
155b of the duct 155.
[0055]
The speaker apparatus 161 according to the sixteenth embodiment shown in FIG. 23 is provided
with two speaker units 162 and 163, and a hollow body 165 is attached to a substantially central
portion of the cabinet 164. The speaker units 162 are provided on both sides of the hollow body
165. And 163 are mounted opposite to each other, and a high cut filter 166 is mounted at one
end of the hollow body 165 and protrudes on the front side of the baffle surface 164 a of the
cabinet 164.
[0056]
In this example, the hollow body 165 also acts as a high cut filter on both the speaker units 162
and 163 together with the high cut filter 166, and can emit low sound with good sound quality.
Further, the generation of resonance in the hollow body 165 is prevented by the high cut filter
166.
[0057]
01-05-2019
11
Openings 167 and 168 are formed in the back surface 164 b of the cabinet 164 corresponding
to the speaker units 162 and 163, respectively.
[0058]
In the loudspeaker apparatus 171 of the seventeenth embodiment shown in FIG. 24, the
loudspeaker unit 172 is attached to the baffle surface 173a of the cabinet 173, the high cut filter
174 is attached to this front side, and the baffle surface is mounted in the cabinet 173. A hollow
chamber 175 is formed on the side 173a, and a bassiv radiator 176 is attached to a portion of
the baffle surface 173a corresponding to the hollow chamber 175. A duct between the rear
surface of the hollow chamber 175 and the rear surface 173b of the cabinet 173 An opening
178 communicating with the space of the cabinet 173 is formed in the hollow chamber 175 to
connect the inside of the hollow chamber 175 with the outside of the back surface 173 b of the
cabinet 173.
[0059]
In the speaker apparatus 171 of this example configured as above, the high-cut filter 174 cuts
high-frequency components of the radiation on the front side of the speaker unit 172, and the
sound of the rear, that is, the sound wave of the bass is hollow through the opening 178.
Entering the chamber 175, both the bassiv radiator 176 and the duct 177 operate to improve the
bass range.
[0060]
In the speaker apparatus 181 of the eighteenth embodiment shown in FIG. 25, the speaker unit
182 is mounted on the hub side 183a of the cabinet 183 in the same manner as the seventeenth
embodiment described above, and the high cut filter 184 is mounted on the front side. .
[0061]
A baffle radiator 185 is attached to the baffle surface 183 a of the cabinet 183, and a duct 186 is
fixed at the front end in the orthogonal direction at the center on the inner surface side of the
bassifier radiator 185. In the middle portion of the duct 186, a vent hole 186a opened in the
cabinet 183 is bored.
[0062]
In the speaker device 181 of this example configured as above, the high-cut filter 184 cuts highfrequency components of the radiation on the front side of the speaker unit 182 and the
radiation on the rear side, that is, sound waves in the low-frequency range is a bassive radiator
01-05-2019
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185 Through the vent holes 186a of the duct 186 and radiate from the rear end opening of the
duct 186 to the rear of the back surface 183b of the cabinet 183, wherein the duct 186 vibrates
back and forth integrally with the bassive radiator 185. Do.
[0063]
In this way, both the bassive radiator 185 and the duct 186 operate, and shifting the resonance
point of this operation improves the low frequency range of the sound radiated to the rear side of
the speaker unit 182.
[0064]
In the speaker apparatus 191 of the nineteenth embodiment shown in FIG. 26, the speaker unit
192 is attached to the baffle surface 193a of the cabinet 193, the high cut filter 194 is attached
to the front side, and the baffle radiator and duct are integrated on the baffle surface 193a. A
fixed bass radiating member 195 is attached.
That is, the bass radiation member 195 has a tapered duct 196 with a small cross sectional area
S1 of the outer end opening 196a and a large cross sectional area S2 of the inner end opening
196b as the baffle surface 193a and the damper 197 at the outer end opening 196a side. , And
an edge 198 is provided on the side of the inner end opening 196b, and is connected to the
cabinet 193 through the edge 198.
[0065]
In the speaker device 191 of this example configured as described above, the high cut filter 194
cuts the high frequency range component of the radiation sound radiated from the front side of
the speaker unit 192.
[0066]
The sound radiated from the rear side of the speaker unit 192, that is, the sound wave in the low
frequency range is emitted to the front side of the baffle surface 193a through the duct 196 of
the bass radiation member 195. Since the duct 196 itself is supported by the damper 197 and
the edge 198 relative to the cabinet 193 at this time, the duct 196 itself is supported by the front
and rear It vibrates in the (outward and outward) direction and acts as a bassive radiator.
01-05-2019
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[0067]
As described above, the bass radiating member 195 performs both the operation of the bassive
radiator and the duct, and can radiate the bass with the good crispness and the good sound
quality, and can improve the bass.
[0068]
As mentioned above, although the Example of this invention was described, this invention is not
limited to these Examples, It can change variously in the range which does not deviate from the
meaning of this invention.
[0069]
The present invention is not limited to a speaker device used alone, but can also be applied to a
speaker device incorporated and used in audio equipment such as a television, a radio, and a
recording and reproducing device, and can also be applied to headphones etc. It is a thing.
[0070]
As described above, in the speaker device according to the present invention, by arranging the
high cut filter on the front side of the speaker unit, the reproduction band on the low band side is
extended and the frequency characteristic on the high band side is lowered, and the sound
quality is good. It is possible to play back low-pitched sounds.
[0071]
Moreover, the bass can be further improved by providing the cabinet with an acoustic tube and a
bass radiating member.
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