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JP2008193417

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2008193417
An object of the present invention is to improve the acoustic characteristics of a speaker with a
simple structure. According to the present invention, a driver unit (2) having a cone-shaped
diaphragm (11) and a position opposed to the peripheral portion of the cone-shaped diaphragm
(11) are provided to prevent the generation of sound generated from the cone-shaped diaphragm
(11). Cone-shaped vibration including a sound emitting unit 53 including a horn-shaped
equalizer 21 and a horn 57 disposed in the vicinity of the center side of the cone-shaped
diaphragm 11 and directing the sound generated from the cone-shaped diaphragm 11 to the
outside In order to allow part of the sound generated from the plate 11 to escape to the outside
of the horn 57, a peripheral portion sound escape through hole 62 provided in the flange-like
equalizer 21 is provided. [Selected figure] Figure 5
Speaker unit and speaker device
[0001]
The present invention relates to a speaker unit and a speaker device, and is suitably applied to,
for example, a cone type horn tweeter using a cone type diaphragm.
[0002]
Conventionally, as shown in FIG. 1, a cone type horn tweeter 1 with an equalizer is roughly
divided into a driver unit 2 and a sound emitting unit 3 for efficiently emitting the sound output
from the driver unit 2 to the outside There is.
[0003]
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The driver unit 2 has a substantially conical cone-shaped diaphragm 11 whose tip is opened, and
is supported by the frame 12 through the edge of the cone-shaped diaphragm 11, while the
inside of the cone-shaped diaphragm 11 is The opening portion of the voice coil 13 is fixed to the
wound voice coil bobbin 14 of the voice coil 13.
[0004]
The cone-shaped diaphragm 11 is attached in a state in which the hemispherical head cap 11A
protrudes in the spreading direction of the cone-shaped diaphragm 11 so as to cover the opening
portion of the outer periphery, and deformation of the cone-shaped diaphragm 11 in the radial
direction As well as preventing the ingress of dust and the like.
[0005]
In the driver unit 2, a magnetic circuit portion 15 for vibrating the cone-shaped diaphragm 11
back and forth is attached to the lower end side of the frame 12 in a fixed state.
[0006]
The magnetic circuit unit 15 has a disk-shaped yoke 16 in which a cylindrical pole piece 16A is
planted from the center, and an annular magnet 17 is fixed so as to surround the upper
periphery of the yoke 16. An annular plate 18 is stacked and fixed on the magnet 17.
[0007]
When the magnetic circuit unit 15 is attached to the frame 12 as a result of fixing the upper
surface of the plate 18 and the lower surface of the frame 12 to the driver unit 2, the voice coil
bobbin 14 around which the voice coil 13 is wound becomes the pole piece 16A and the pole
piece 16A. It is held so as to surround the magnetic gap formed between the plates 18 in a
noncontact manner.
[0008]
Further, in the driver unit 2, the opening portion on the inner peripheral side of the cone-shaped
diaphragm 11 is supported by the damper 19 attached to the frame 12 and the voice coil bobbin
14, whereby the cone-shaped diaphragm 11 is When moving in the front-rear direction, the noncontact state of the voice coil bobbin 14 and the voice coil 13 in the magnetic gap can be
maintained.
[0009]
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Thus, in the driver unit 2, when an electromagnetic force is applied to the magnetic gap of the
magnetic circuit unit 15 by an applied current based on an audio signal supplied to the voice coil
13 from the outside, the voice coil 13 attracts or repels the magnet 17. Thus, the cone-shaped
diaphragm 11 vibrates back and forth to generate a sound wave according to the audio signal.
[0010]
On the other hand, in the sound emitting unit 3 of the cone-type horn tweeter 1 with equalizer,
the flange-shaped equalizer 21 having an annular shape is attached to the edge of the coneshaped diaphragm 11 via the gasket 20. A tubular horn 8 having an opening area gradually
increasing toward the tip is attached.
[0011]
The horn 8 has an inner space called sound path, and a tip opening is called an opening, and a
small opening at the base end is called a throat to efficiently radiate a sound wave into the space.
It plays a role of connecting the mold diaphragm 11 and the external space, and is used
electroacoustically for matching with the air.
[0012]
Further, in the sound emitting portion 3, not only the flange-like equalizer 21 is attached at a
position facing the outer peripheral portion of the cone-shaped diaphragm 11 but also
substantially opposed to the head cap 11 A provided at the central portion of the cone-shaped
diaphragm 11. A bullet-shaped equalizer 31 having a bullet shape is attached to the flangeshaped equalizer 21 at, for example, a three-point support.
[0013]
Due to the short wavelength of the sound in the high frequency band, the shell-shaped equalizer
31 loses the same phase between the sound generated from the central portion of the coneshaped diaphragm 11 and the sound generated from the peripheral portion of the cone-shaped
diaphragm 11 Therefore, it is provided to transmit to the horn 8 a sound generated from a
predetermined concentric circumferential portion of the cone-shaped diaphragm 11 where
interference with each other causes a decrease in sound output.
[0014]
In practice, the sound emitting unit 3 uses the horn 8 to generate the sound mainly generated
from the concentric circular portion of the cone-shaped diaphragm 11 corresponding to the
opening area corresponding to the intervals D1 and D2 between the flange-shaped equalizer 21
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and the shell-shaped equalizer 31. By deriving it to the outside, the sound of the same phase is
mainly output.
[0015]
Therefore, the cone-type horn tweeter 1 with equalizer is configured to efficiently output the
sound generated by the cone-shaped diaphragm 11 of the driver unit 2 through the flange-like
equalizer 21 and the horn 8 of the sound emitting unit 3.
[0016]
On the other hand, when the sound emitted from the central portion of the diaphragm and the
sound emitted from the peripheral portion of the diaphragm are synthesized, the phase
difference between the phase of the central sound and the phase of the peripheral sound does
not occur. In order to achieve this, there is a horn speaker using a so-called dome-shaped
diaphragm in which an equalizer called a phase equalizer is provided on the front surface of the
diaphragm (see, for example, Patent Document 1).
Japanese Patent Application Laid-Open No. 62-111599
[0017]
By the way, in the cone-type horn tweeter 1 with such a configuration (FIG. 1), from the
concentric circle peripheral portion of the cone-shaped diaphragm 11 corresponding to the
opening region corresponding to the distance D1 and D2 between the flange-shaped equalizer 21
and the shell-shaped equalizer 31 Although only the sound of the same phase is mainly derived
from the horn 8 to the outside, it is interfered by the non-phase sound generated from the
opening region according to the distance D1, D2 of the peripheral part of the cone-shaped
diaphragm 11 Therefore, as shown in FIG. 2, there has been a problem that the sound pressure
level of the sound wave generated from the cone-shaped diaphragm 11 is temporarily greatly
reduced in the vicinity of about 5000 [Hz].
[0018]
Moreover, in the horn speaker using the dome-shaped diaphragm shown by patent document 1,
the path length which derives the sound of a center part, and the path length which derives the
sound of a peripheral part are equalized, There is a problem that it is difficult to form with a die,
because an equalizer having a complicated structure in which a plurality of slits are formed to
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prevent a phase difference with the sound of the peripheral portion is required.
[0019]
The present invention has been made in consideration of the above points, and an object of the
present invention is to propose a speaker unit and a speaker device having a simple structure
and excellent acoustic characteristics.
[0020]
In order to solve such problems, in the speaker unit and the speaker device according to the
present invention, a driver unit having a cone-shaped diaphragm and a sound generated from the
cone-shaped diaphragm provided at a position facing the peripheral portion of the cone-shaped
diaphragm Sound emitting means comprising a flange for preventing the lead-out and a lead-out
portion disposed opposite to the center-side near position of the cone-shaped diaphragm to lead
the sound generated from the cone-shaped diaphragm to the outside; And a through hole
provided in the flange for escaping a part of the sound generated from the outside to the outside
of the lead-out portion.
[0021]
Thereby, the sound generated from the position near the center side of the cone-shaped
diaphragm is led to the outside of the sound emitting means by the equalizer function of the leadout part, and the sound generated from the peripheral part of the cone-shaped diaphragm is led
out from the through hole of the flange To prevent the reduction of the acoustic output in a
predetermined frequency band by avoiding the interference between the sound generated from
the peripheral portion of the cone-shaped diaphragm and the sound generated from the position
near the center of the cone-shaped diaphragm. Can.
[0022]
Further, in the speaker unit and the speaker device according to the present invention, a driver
unit having a cone type diaphragm and a position opposed to the peripheral portion of the cone
type diaphragm to prevent the sound from being generated from the cone type diaphragm
Equalizer section having a columnar projection arranged at a position facing the center of the
flange and the cone-shaped diaphragm, and a diaphragm disposed so as to surround the
columnar projection and maintaining a predetermined distance from the columnar projection
Provided in the flange in order to release the sound generated from the peripheral part of the
cone type diaphragm to the outside of the lead out part, which is the sound emitting means
comprising the lead out part for leading out the generated sound to the outside and the cone
type diaphragm And providing a through hole.
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[0023]
Thereby, the sound generated from the central portion of the cone-shaped diaphragm is led to
the outside of the sound emitting means by the equalizer function of the columnar projection,
and the sound generated from the peripheral portion of the cone-shaped diaphragm is led out
from the through hole of the flange Can be avoided in advance to prevent interference between
the sound generated from the peripheral portion of the cone-shaped diaphragm and the sound
generated from the central portion of the cone-shaped diaphragm to prevent the reduction of the
acoustic output in a predetermined frequency band.
[0024]
According to the present invention, the sound generated from the position near the center side of
the cone-shaped diaphragm is led to the outside of the sound emitting means by the equalizer
function of the lead-out portion, and the sound generated from the peripheral portion of the
cone-shaped diaphragm is the flange penetrating It escapes from the hole to the outside of the
lead-out part, and avoids the interference between the sound generated from the peripheral part
of the cone-shaped diaphragm and the sound generated from the position near the center side of
the cone-shaped diaphragm in advance. Thus, a speaker unit and a speaker device with excellent
acoustic characteristics can be realized with a simple structure.
[0025]
Further, according to the present invention, the sound generated from the central portion of the
cone-shaped diaphragm is led to the outside of the sound emitting means by the equalizer
function of the columnar projection, and the sound generated from the peripheral portion of the
cone-shaped diaphragm is penetrated by the flange. It escapes from the hole to the outside of the
lead-out part, and avoids the interference between the sound generated from the peripheral part
of the cone-shaped diaphragm and the sound generated from the central part of the cone-shaped
diaphragm to prevent the reduction of the acoustic output in a predetermined frequency band
Thus, a speaker unit and a speaker device with excellent acoustic characteristics can be realized
with a simple structure.
[0026]
Hereinafter, an embodiment of the present invention will be described in detail with reference to
the drawings.
[0027]
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(1) Overall Configuration of Speaker Device In FIG. 3, 50 shows the speaker device according to
the present invention as a whole, and wood back plate 52A and left and right trunk plates 52B
and 52C constituting cabinet 52 are attached to each other. Interposed members 55 made of a
plastic material such as polystyrene are adhered to the plates 52B and 52C.
[0028]
The speaker device 50 is bonded to the mounting hole 55A of the intervening member 55 in a
state in which the boss 56A of the front panel 56 made of a plastic material such as polystyrene
is fitted into the front panel 56 on the front surface of the cabinet 52. Will be attached.
[0029]
In the speaker device 50, a cone-type horn tweeter 51 with a peripheral sound relief through
hole is disposed substantially at the center of the front panel 56, and the opening of the horn 57
in the peripheral portion with a circular sound escape through-hole cone type horn tweeter 51.
The front end of the front panel 56 and the front end of the opening of the front panel 56 are
attached by screws 58 and 59.
[0030]
(2) Configuration of peripheral portion sound relief through hole cone type horn tweeter As
shown in FIG. 4 in which the same reference numerals are given to corresponding portions with
FIG. 1, peripheral portion sound relief through hole cone type horn tweeter 51 The driver unit 2
is divided into an audio emitting unit 53 for efficiently emitting the sound output from the driver
unit 2 to the outside.
[0031]
The driver unit 2 has a substantially conical cone-shaped diaphragm 11 whose tip is opened, and
is supported by the frame 12 through the edge of the cone-shaped diaphragm 11, while the
inside of the cone-shaped diaphragm 11 is The opening portion of the voice coil 13 is fixed to the
wound voice coil bobbin 14 of the voice coil 13.
[0032]
The cone-shaped diaphragm 11 is attached in a state in which the hemispherical head cap 11A
protrudes in the spreading direction of the cone-shaped diaphragm 11 so as to cover the opening
portion of the outer periphery, and deformation of the cone-shaped diaphragm 11 in the radial
direction As well as preventing the ingress of dust and the like.
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[0033]
In the driver unit 2, a magnetic circuit unit 15 for vibrating the cone-shaped diaphragm 11 back
and forth is attached to the lower end side of the frame 12 in a fixed state.
[0034]
The magnetic circuit unit 15 has a disk-shaped yoke 16 in which a cylindrical pole piece 16A is
planted from the center, and an annular magnet 17 is fixed so as to surround the upper
periphery of the yoke 16. An annular plate 18 is stacked and fixed on the magnet 17.
[0035]
When the magnetic circuit unit 15 is attached to the frame 12 as a result of fixing the upper
surface of the plate 18 and the lower surface of the frame 12 to the driver unit 2, the voice coil
bobbin 14 around which the voice coil 13 is wound becomes the pole piece 16A and the pole
piece 16A. It is held so as to surround the magnetic gap formed between the plates 18 in a
noncontact manner.
[0036]
Further, in the driver unit 2, the opening portion on the inner peripheral side of the cone-shaped
diaphragm 11 is supported by the damper 19 attached to the frame 12 and the voice coil bobbin
14, whereby the cone-shaped diaphragm 11 is When moving in the front-rear direction, the noncontact state of the voice coil bobbin 14 and the voice coil 13 in the magnetic gap can be
maintained.
[0037]
Thus, in the driver unit 2 of the peripheral part sound escape through hole cone type horn
tweeter 51, when an electromagnetic force is applied to the magnetic gap of the magnetic circuit
unit 15 by the applied current based on the audio signal supplied to the voice coil 13 from the
outside, When the voice coil 13 attracts or repels the magnet 17, the cone-shaped diaphragm 11
vibrates back and forth to generate a sound wave corresponding to the audio signal.
[0038]
On the other hand, in the sound emitting portion 53 of the cone-shaped horn tweeter 51 with the
peripheral portion sound escape through hole, the flange-shaped equalizer 21 having an annular
shape with the gasket 20 at the edge of the cone-shaped diaphragm 11 in the driver unit 2 While
being attached, a tubular horn 57 having an opening area gradually increasing toward the tip is
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attached to the flange-like equalizer 21 by adhesion.
[0039]
In this horn 57, the inner space is called a sound path, the tip opening is called an opening, and
the small opening at the base end is called a throat, for efficiently emitting sound waves into the
space. It plays a role of connecting the mold diaphragm 11 and the external space, and is used
electroacoustically for matching with the air.
[0040]
Further, the sound emitting portion 53 not only has the flange-shaped equalizer 21 attached at a
position facing the outer peripheral portion of the cone-shaped diaphragm 11, but also
substantially faces the head cap 11A provided at the central portion of the cone-shaped
diaphragm 11. A bullet-shaped equalizer 31 having a shell shape substantially matching the
outer peripheral shape of the voice coil bobbin 14 is attached to the flange-shaped equalizer 21
by, for example, three-point support.
[0041]
Incidentally, in the peripheral portion sound escape through hole cone type horn tweeter 51,
various sizes such as the size of the opening area and the shape of the shell shaped equalizer 31
according to the distance D1 and D2 between the flanged equalizer 21 and the shell shaped
equalizer 31 The factors determine the sound pressure frequency characteristics of the sound
ultimately derived from the horn 57.
[0042]
Due to the short wavelength of the sound in the high frequency band, the shell-shaped equalizer
31 loses the same phase between the sound generated from the central portion of the coneshaped diaphragm 11 and the sound generated from the peripheral portion of the cone-shaped
diaphragm 11 Therefore, the sound generated from a predetermined concentric circumferential
portion of the cone-shaped diaphragm 11 is transmitted to the horn 57 where the sound output
decreases due to interference with each other.
[0043]
In fact, the cone-type horn tweeter 51 with a peripheral sound relief through hole is formed from
the concentric circular portion of the cone-shaped diaphragm 11 corresponding to the opening
region corresponding to the distance D1 and D2 between the flange-shaped equalizer 21 and the
shell-shaped equalizer 31. Since the sound mainly generated is led to the outside by the horn 57,
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the sound having the same phase is mainly output, and the reduction of the sound output can be
suppressed.
[0044]
Furthermore, the cone-type horn tweeter 51 with a peripheral portion sound relief through hole
is a cylinder for escaping the sound generated at the peripheral portion of the cone type
diaphragm 11 to the outside of the horn 57 with respect to the center side vicinity position in the
flanged equalizer 21. A plurality of peripheral sound release through holes 62 having a
predetermined diameter are provided along the entire circumference of the cone-shaped
diaphragm 11.
[0045]
The peripheral sound release through hole 62 is a horn 57 that has a phase difference largely
offset from the phase of the sound generated at the central portion of the cone-shaped
diaphragm 11 due to the divided vibration generated in the peripheral portion of the coneshaped diaphragm 11. The sound pressure level in a predetermined frequency band (in this case,
5000 [Hz] in this case) is large because the sounds in which the phase difference is generated
mutually interfere and are canceled by being released to the outside of the horn 57 without
being derived from the It is for preventing attenuation.
[0046]
As a matter of fact, the sound pressure characteristics at the time of picking up the sound
generated from the central portion of the cone-shaped diaphragm 11 by the microphone in the
peripheral part sound escape through hole type cone type horn tweeter 51 are shown in FIG.
Thus, the drop in sound pressure level is significantly reduced in the vicinity of 5000 Hz.
[0047]
(3) Operation and Effect In the above configuration, the cone-shaped horn tweeter 51 with the
peripheral portion sound escape through hole uses the cannonball shaped equalizer 31 having a
simple shape, and a plurality of peripheral portion acoustic escape through holes 62 are
provided. By using the flange-like equalizer 21, as compared with the case of using an equalizer
having a complicated configuration as shown in FIG. 2 of Patent Document 1, the die molding of
the shell-like equalizer 31 and the flange-like equalizer 21 is performed. Since it becomes easy,
the manufacturability can be greatly improved.
[0048]
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10
In addition, the cone-shaped horn tweeter 51 with a peripheral portion sound escape and
through hole has a cylindrical shape for escaping the sound generated in the peripheral portion
of the cone-shaped diaphragm 11 to the outside of the horn 57 with respect to the center side
vicinity position in the flanged equalizer 21. By providing a plurality of peripheral sound release
through holes 62 each having a predetermined diameter, the phase of the sound generated at the
central portion of the cone-shaped diaphragm 11 due to the divided vibration generated at the
peripheral portion of the cone-shaped diaphragm 11 A sound with a large phase difference can
be released to the outside without being derived from the inside of the horn 57.
[0049]
As a result, the cone-type horn tweeter 51 with the peripheral portion sound escape and through
hole prevents the cancellation of the interference noise caused by the phase difference between
the central portion and the peripheral portion of the cone-shaped diaphragm 11 in advance. A
large attenuation of the sound pressure level in a predetermined frequency band (in this case,
around 5000 Hz) can be reliably prevented.
[0050]
That is, like the conventional cone-type horn tweeter 1 with equalizer (FIG. 1), the peripheral part
sound escape through hole cone-type horn tweeter 51 outputs only the sound of the same phase
from the horn 8 using the shell-shaped equalizer 31. Instead of the technical idea of suppressing
the derivation from the horn 57 of the sound generated at the peripheral portion of the coneshaped diaphragm 11 by the flange-shaped equalizer 21, the center portion through the
peripheral portion sound escape through hole 62 of the flange-shaped equalizer 21 The sound of
the same phase generated at the central part of the cone-shaped diaphragm 11 is discharged
from the horn 57 by discarding the sound of the peripheral part greatly shifted from the phase of
the sound generated in the part to the outside of the horn 57 actively. It is a technical idea to
output.
[0051]
As described above, the cone-type horn tweeter 51 with the peripheral portion sound escape and
through hole has the equalizer action by the shell-shaped equalizer 31 and the flange-like
equalizer 21 and the sound pressure of the predetermined frequency band by the peripheral
portion acoustic escape through hole 62 of the flange-like equalizer 21 Due to the level
attenuation prevention function, it is possible to provide a listener with sound with much higher
sound quality than the conventional equalizer type horn-type horn tweeter 1 (FIG. 1).
[0052]
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11
According to the above configuration, in addition to the equalizer action by the shell-shaped
equalizer 31 and the flange-shaped equalizer 21, the peripheral part sound escape through-hole
cone-type horn tweeter 51 is plural over the entire central side of the flange-shaped equalizer 21.
The sound pressure level attenuation prevention function of a predetermined frequency band by
releasing the sound generated at the peripheral part of the cone-shaped diaphragm 11 to the
outside of the horn 57 through the peripheral part sound release through hole 62 formed has a
simple structure. Acoustic characteristics can be significantly improved.
[0053]
(4) Other Embodiments In the above-described embodiment, the case where the bullet shaped
equalizer 31 as shown in FIG. 4 is provided as the columnar protrusion is described, but the
present invention is limited to this. Instead, an equalizer formed in various other columns such as
a cylindrical shape may be provided.
[0054]
In particular, in the cone-type horn tweeter 51 with peripheral sound escape and through holes,
various sizes such as the size of the opening area and the shape of the shell-shaped equalizer 31
according to the distance D1 and D2 between the flange-shaped equalizer 21 and the shellshaped equalizer 31 Since the sound pressure frequency characteristic of the sound finally
derived from the horn 57 is determined by the factor, if it is acceptable that the sound pressure
frequency characteristic changes, the flange-like equalizer 21 and the cannonball are The size of
the opening area according to the distance from the shape equalizer 31, the shape of the shell
shape equalizer 31, etc. may be slightly changed.
[0055]
In the embodiment described above, although the flange-shaped equalizer 21 is provided with
the peripheral sound escape through hole 62 (FIG. 4) having a predetermined diameter, the
present invention is not limited to this, and a cone type If it is a position opposed to the
peripheral portion of the diaphragm 11, the diameter is further increased or decreased, or the
peripheral portion sound escape through hole 62 is further inside or outside from the position
near the center of the flange-like equalizer 21 You may shift slightly.
[0056]
Furthermore, in the embodiment described above, a speaker having a structure in which the
opening end of the horn 57 and the opening end of the front panel 56 in the peripheral sound
relief through hole cone-type horn tweeter 51 are attached by screws 68 and 69. Although the
case where the device 50 is targeted is described, the present invention is not limited to this, and
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a speaker device having a structure in which the tip of the opening of the horn 57 and the tip of
the opening of the front panel 6 are integrated is targeted You may make it to.
[0057]
Furthermore, in the above-described embodiment, the case where the peripheral portion sound
relief through hole cone-type horn tweeter 51 having a structure in which the flange-shaped
equalizer 21 and the tubular horn 57 are integrally attached by adhesion is used. However, the
present invention is not limited to this, and it is also possible to use a cone-type horn tweeter 51
with a peripheral sound escape through hole in which the flange-like equalizer 21 and the
tubular horn 57 are integrated.
[0058]
Further, in the embodiment described above, the sound emitting unit 53 as sound emitting
means comprising the driver unit 2 as the driver unit, the flange-like equalizer 21 as the flange
and the horn 57 as the lead-out, and the peripheral portion as the through hole Although the
case where the peripheral portion sound relief through hole cone-type horn tweeter 51 as the
speaker unit of the present invention is configured by the sound relief through hole 62 has been
described, the present invention is not limited to this, and other various configurations The
speaker unit and the speaker device according to the present invention may be configured by the
driver unit, the sound emitting unit including the flange and the lead-out portion, and the
through hole provided in the flange.
[0059]
The speaker unit and the speaker device of the present invention can be applied to various types
of speakers.
[0060]
FIG. 6 is a schematic cross-sectional view showing a cross-sectional structure of a conventional
cone-type horn tweeter with equalizer.
It is a substantially linear characteristic curve figure which shows the sound pressure frequency
characteristic of the conventional cone type horn tweeter with an equalizer.
02-05-2019
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FIG. 1 is a schematic cross-sectional view showing an entire configuration of a speaker device
according to the present invention.
It is an approximate line sectional view showing the section structure of the cone type horn
tweeter with a peripheral part sound relief penetration hole in the present invention.
It is an approximate-linear-like characteristic-curve figure which shows the sound pressure
frequency characteristic of a cone-shaped horn tweeter with a peripheral part sound escape
penetration hole.
Explanation of sign
[0061]
DESCRIPTION OF SYMBOLS 1 ............ Cone type horn tweeter with an equalizer, 2 ...... Driver unit,
3 ...... Sound emission part, 11 ...... Cone diaphragm, 12 ...... Frame, 13 ...... Voice coil, 14 ...... Voice
coil bobbin, 15 ... ... Magnetic circuit portion 16 ... Yoke 17 ... Magnet 18 ... Plate 19 19 Damper
21 Flanged equalizer 31 Shell shaped equalizer 50, 60 Speaker device 51 Cone type horn
tweeter with cylindrical equalizer, 52: Cabinet, 55: Intervening member, 56: Front panel, 57:
Horn, 58: Cylindrical equalizer, 61: Cylindrical equalizer and peripheral sound escape and
penetration Perforated cone-type horn tweeter, 62 ...... peripheral sound relief through hole, 68,
69 ...... screw.
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