WO2016013122A1 - 複合スピーカ装置 - Google Patents
複合スピーカ装置 Download PDFInfo
- Publication number
- WO2016013122A1 WO2016013122A1 PCT/JP2014/069754 JP2014069754W WO2016013122A1 WO 2016013122 A1 WO2016013122 A1 WO 2016013122A1 JP 2014069754 W JP2014069754 W JP 2014069754W WO 2016013122 A1 WO2016013122 A1 WO 2016013122A1
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- WIPO (PCT)
- Prior art keywords
- sound
- diaphragm
- absorbing material
- speaker unit
- speaker device
- Prior art date
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- 239000002131 composite material Substances 0.000 title claims abstract description 101
- 230000005855 radiation Effects 0.000 claims abstract description 67
- 239000011358 absorbing material Substances 0.000 claims description 103
- 238000009434 installation Methods 0.000 claims description 8
- 230000000644 propagated effect Effects 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000010363 phase shift Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 10
- 230000007423 decrease Effects 0.000 description 6
- 230000001902 propagating effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means for loudspeaker transducers
Definitions
- the present invention relates to a composite speaker device.
- the high-sound speaker unit holding structure is a thin metal rod made of a non-magnetic material, thereby reducing the shielding in the sound emission direction of the low-frequency speaker unit.
- a part of the sound from the high-pitched speaker unit may be propagated by diffraction or the like to the low-pitched speaker unit located in the direction opposite to the sound emission direction. Propagation of such sound from the high-sound speaker unit to the low-sound speaker unit may also cause disturbance in the sound radiation characteristics of the composite speaker device.
- the composite speaker device described in Patent Document 1 for example, there is a problem that no effective countermeasure is taken for the disturbance of the sound radiation characteristic due to the propagation of the sound.
- an object of the present invention is to provide a composite speaker device that can suppress the disturbance of sound radiation characteristics caused by the propagation of sound from a high-frequency speaker unit to a low-frequency speaker unit.
- the invention described in claim 1 is a first speaker unit having a first diaphragm, and the first speaker unit installed in a sound radiation direction of the first diaphragm. And a second speaker unit having a second diaphragm having a diameter smaller than that of the first diaphragm, and a sound absorbing surface of the first diaphragm in a sound radiation direction surrounds the second diaphragm.
- the composite speaker device is characterized in that the material is arranged.
- FIG. 1 It is a figure which shows the composite speaker apparatus concerning one Example of this invention.
- a composite speaker device has a first speaker unit having a first diaphragm and a diameter smaller than that of the first diaphragm installed in the sound radiation direction of the first diaphragm.
- a second speaker unit having a second diaphragm, and a sound absorbing material is disposed on the surface of the first diaphragm in a sound radiation direction so as to surround the second diaphragm.
- the first speaker unit functions as a low-pitched speaker unit
- the second speaker unit functions as a high-pitched speaker unit.
- a sound absorbing material is disposed on the surface of the first diaphragm in the sound radiation direction so as to surround the second diaphragm. For this reason, even if the sound from the second speaker unit as the high-pitched speaker unit propagates to the first speaker unit as the low-pitched speaker unit, the sound is absorbed by the sound absorbing material. According to this composite speaker device, it is possible to suppress disturbance in sound radiation characteristics due to sound propagation from the high-frequency speaker unit to the low-frequency speaker unit by sound absorption by the sound absorbing material.
- the disturbance of the sound radiation characteristic is suppressed by a configuration in which the material cost and the manufacturing cost are relatively small, such as the arrangement of the sound absorbing material on the surface of the first diaphragm in the sound radiation direction. be able to.
- the sound absorbing material is disposed on the surface of the first diaphragm in the sound emission direction, and the space in the sound emission direction of the first diaphragm is free from foreign matter, so that the appearance is also good. It has become a thing.
- the axis of the first speaker unit and the axis of the second speaker unit are coincident. According to this composite speaker device, a high sound and a low sound can be heard from substantially the same position, so that a good sound image can be obtained.
- the sound absorbing material has an annular shape. According to this composite speaker device, the sound propagating from the second speaker unit to the first speaker unit can be uniformly absorbed around the axis of the second speaker unit by the annular sound absorbing material. Therefore, the disturbance of sound radiation characteristics is further suppressed.
- an opening is formed at the center of the first diaphragm, and the diameter of the second diaphragm is larger than the diameter of the opening. It is further preferable that the value is small. According to this composite speaker device, a situation in which the second diaphragm becomes a shield in the sound radiation direction of the first diaphragm is avoided.
- a sound absorbing material is disposed around the opening. More preferably. According to this composite speaker device, since the sound absorbing material is disposed around the opening that is relatively inconspicuous when viewed from the sound emission direction, the appearance can be improved.
- the wavelength corresponding to the overlapping frequency which is the frequency of the sound radiated from the first speaker unit and the second speaker unit, is ⁇ .
- the surface of the first diaphragm in the sound radiation direction is changed from the surface of the second diaphragm in the sound radiation direction to the surface of the first diaphragm in the sound radiation direction.
- the length of the propagation path difference between the propagation path of the sound reflected and reflected and the propagation path of the sound radiated from the surface in the sound radiation direction of the second diaphragm is (2n + 1) ⁇ ⁇ (1/2 ⁇ 1 It is preferable that the sound absorbing material is disposed at least at one location within the installation range including the location that becomes / 16). Within the above installation range, the overlapping frequency sound from the second speaker unit is propagated and reflected from the surface of the second diaphragm in the sound radiation direction to the surface of the first diaphragm in the sound radiation direction. It overlaps in a state shifted by about 1/2 wavelength with respect to the sound of frequency.
- the load applied to the first diaphragm is suppressed by limiting the amount of the sound absorbing material used by limiting the location of the sound absorbing material to a position where the sound pressure drop is likely to occur. While suppressing, it is possible to suppress a decrease in sound pressure and suppress disturbance of sound radiation characteristics.
- the length of the propagation path difference in the surface of the first diaphragm in the sound radiation direction is (2n + 1) ⁇ ⁇ (1 / 2 ⁇ 1 / 16) ⁇ ( It is further preferable that the sound absorbing material is disposed at least at one place within a range of 2n + 1) ⁇ ⁇ (1/2 + 1/16).
- the amount of the sound absorbing material used is further suppressed by limiting the location of the sound absorbing material to a position where the phase shift in the overlapping frequency sounds that interfere with each other is closer to 180 °. Disturbance of characteristics can be suppressed.
- the sound absorbing material is disposed at one place. According to this composite speaker device, the amount of the sound absorbing material used is further suppressed by limiting the location of the sound absorbing material to a position where the phase shift in the overlapping frequency sound that interferes with each other is approximately 180 °. Can be suppressed.
- the natural number n Is more preferably 0.
- this composite speaker device even if there are a plurality of locations where the length of the propagation path difference is (2n + 1) ⁇ ⁇ (1/2), it is in the vicinity of the location closest to the second diaphragm among them. A sound absorbing material is arranged. For this reason, even if it is a composite speaker apparatus small to some extent, it becomes possible to arrange the sound absorbing material at a suitable position.
- FIG. 1 is a diagram showing a composite speaker device according to an embodiment of the present invention.
- FIG. 1A shows a cross-sectional view of the composite speaker device 1 along the sound emission direction.
- FIG. 1B shows a schematic diagram of two diaphragms described later possessed by the composite speaker device 1 when viewed from the direction of arrow D2 in FIG.
- the composite speaker device 1 includes a low-pitched speaker unit 10 and a high-pitched speaker unit 20.
- the low-pitched speaker unit 10 corresponds to an example of the first speaker unit according to the present invention
- the high-pitched speaker unit 20 corresponds to an example of the second speaker unit according to the present invention.
- the low-frequency speaker unit 10 includes a low-frequency diaphragm 11, a low-frequency sound frame 12, a low-frequency sound damper 13, a low-frequency sound voice coil 14, and a low-frequency sound magnetic circuit 15.
- the low-frequency sound diaphragm 11 is a cone-shaped member, and an opening 11a is formed at the center thereof.
- the outer peripheral edge of the bass diaphragm 11 is connected to a cylindrical bass frame 12, and the inner edge of the opening 11a in the bass diaphragm 11 is connected to a cylindrical voice coil bobbin 14a.
- the bass damper 13 is a flexible annular member having an outer peripheral edge connected to the bass frame 12 and an inner peripheral edge connected to the outer peripheral surface of the voice coil bobbin 14a.
- the low-pitched voice coil 14 is formed on the outer peripheral surface of the voice coil bobbin 14 a and is disposed in the magnetic gap 15 a in the low-pitched magnetic circuit 15.
- the diaphragm for low sound 11 corresponds to an example of a first diaphragm according to the present invention.
- the high-pitched speaker unit 20 is disposed inside the voice coil bobbin 14a in the low-pitched speaker unit 10.
- a high sound diaphragm 21, a high sound frame 22, a high sound damper 23, a high sound voice coil 24, and a high sound magnetic circuit 25 are provided.
- the treble diaphragm 21 is a member having a dome shape with a diameter smaller than that of the bass diaphragm 11 installed in the sound emission direction D1 of the bass diaphragm 11. Furthermore, the outer diameter of the treble diaphragm 21 is smaller than the inner diameter of the voice coil bobbin 14 a in the bass speaker unit 10, that is, the inner diameter of the opening 11 a in the bass diaphragm 11.
- the outer peripheral edge of the treble diaphragm 21 is connected to a cylindrical treble frame 22. Moreover, the back surface on the opposite side to the sound radiation direction D1 in the diaphragm for high sound 21 is connected to the upper edge of the cylindrical voice coil bobbin 24a.
- the treble damper 23 is an annular member having flexibility, and has an outer peripheral edge connected to the treble frame 22 and an inner peripheral edge connected to the outer peripheral surface of the voice coil bobbin 24a.
- the high-pitched voice coil 24 is formed on the outer peripheral surface of the voice coil bobbin 24 a and is disposed in the magnetic gap 25 a in the high-pitched magnetic circuit 25.
- the treble diaphragm 21 corresponds to an example of a second diaphragm according to the present invention.
- the low sound component is supplied to the low sound voice coil 14 in the low sound speaker unit 10, and the high sound component is supplied to the high sound voice coil 24 in the high sound speaker unit 20.
- each voice coil vibrates due to Lorentz force acting on each voice coil from each magnetic circuit, and the vibration is transmitted to each diaphragm.
- the low-frequency diaphragm 11 in the low-frequency speaker unit 10 radiates low-frequency sounds in the sound emission direction D1
- the high-frequency vibration plate 21 in the high-frequency speaker unit 20 generates high-frequency sounds in the sound emission direction D1. Radiate.
- the sound range is expanded by having the two speakers handle the low sound range and the high sound range in this way.
- a part of the sound emitted from the high sound diaphragm 21 in the sound emission direction D1 in the high sound speaker unit 20 exceeds the upper edge of the high sound frame 22 due to diffraction or the like. Propagates to the surface of the diaphragm 11.
- the high frequency range of the sound emitted from the low tone speaker unit 10 and the low frequency range of the sound emitted from the high tone speaker unit 20 partially overlap.
- sounds having the same frequency are radiated from both the low-frequency speaker unit 10 and the high-frequency speaker unit 20.
- a range of frequencies in which the frequencies of sounds radiated from both speaker units overlap is referred to herein as an overlap frequency.
- One frequency within this overlapping frequency range is the crossover frequency.
- the sound propagated from the surface in the sound emission direction D1 of the high-pitched vibration plate 21 to the surface in the sound emission direction D1 of the low-pitched vibration plate 11 is reflected on the surface of the low-frequency vibration plate 11.
- the diaphragm for low sound 11 vibrates at the same frequency by a part of the energy of the sound wave, so that the diaphragm for low sound 11 can be regarded as a free end.
- the above reflection is a reflection related to the free end of the sound having the overlapping frequency. Therefore, the overlapping frequency sound from the treble diaphragm 21 has no phase shift due to reflection on the bass diaphragm 11. Therefore, only the phase shift due to the propagation path difference described later should be considered.
- This reflected wave interferes with the sound radiated by the treble diaphragm 21. Then, depending on the phase difference between the two sounds, they may cancel each other out due to the interference between the two, and the sound pressure may decrease, and the sound radiation characteristics of the composite speaker device 1 may be disturbed.
- a circle is formed so as to surround the treble diaphragm 21 in a single layer on the surface in the sound radiation direction D1 of the bass diaphragm 11.
- An annular sound absorbing material 30 is arranged at one location. Even if the sound from the high-frequency speaker unit 20 propagates to the low-frequency speaker unit 10, the sound is absorbed by the sound absorbing material 30.
- the sound absorbing material 30 corresponds to an example of the sound absorbing material referred to in the present invention.
- the measurement of the characteristics of the speaker device is generally performed by the microphone 70 located 1 meter away from the treble diaphragm 21 on the axis of the speaker device.
- Rb is approximately defined as a propagation path up to the same height as the high-frequency diaphragm 21 as described above.
- the propagation path Rb extends from the surface of the bass diaphragm 11 to the circumference of a circle with a radius of 1 m centered on the microphone 70.
- the frequency in the vicinity of 4 kHz is an overlapping frequency.
- the thin line L2 represents, when the sound-absorbing material 30 is not provided, the sound pressure rapidly decreases at this overlapping frequency. This is because, in the high sound pressure region H1 in the sound pressure distribution diagram G1 in FIG. 2A, the sound of the overlapping frequency propagated from the high sound speaker unit 20 is reflected by the low sound diaphragm 11 of the low sound speaker unit 10. This is thought to be because the sounds of the same frequency interfered and canceled each other.
- the composite speaker device 1 of this embodiment provided with the sound absorbing material 30, the sound of the overlapping frequency from the high frequency speaker unit 20 is absorbed by the sound absorbing material 30 on the low frequency diaphragm 11 of the low frequency speaker unit 10. Is done. As a result, as indicated by the thick line L1, a decrease in sound pressure at the overlapping frequency is suppressed.
- the composite speaker device 1 of the present embodiment the sound radiation characteristic is disturbed due to the sound propagation caused by the sound propagation from the high-frequency speaker unit 20 to the low-frequency diaphragm 11 of the low-frequency speaker unit 10. The sound absorption at 30 can be suppressed.
- the axis of the low-pitched speaker unit 10 and the axis of the high-pitched speaker unit 20 coincide. According to the composite speaker device 1, the high sound and the low sound can be heard from substantially the same position, so that a good sound image can be obtained.
- first speaker unit and the second speaker unit As an example of the first speaker unit and the second speaker unit according to the present invention, a low-pitched speaker unit 10 and a high-pitched speaker unit 20 whose axes coincide with each other are illustrated.
- first speaker unit and the second speaker unit according to the present invention are not limited to this, and may be another example as follows.
- the sound absorbing material 30 is arranged around the opening 11a of the diaphragm 11 for bass. More specifically, the sound absorbing material 30 is arranged in the vicinity of the inner periphery of the opening 11a along the inner periphery. According to the composite speaker device 1, since the sound absorbing material 30 is disposed at a position that is relatively inconspicuous when viewed from the sound radiation direction D1, the appearance is improved.
- the position where the length RL1 of the propagation path difference R1 is (2n + 1) ⁇ ⁇ (1/2) is the sound of the overlapping frequency from the high-frequency speaker unit 20 and the sound of the overlapping frequency radiated by the low-frequency speaker unit 10. Is a position that overlaps with a shift of 1 ⁇ 2 wavelength.
- FIG. 6 is a diagram illustrating a phenomenon that occurs when two sounds having the same frequency are shifted and overlap each other.
- FIG. 6A shows a graph G4 representing a phenomenon that occurs when two sounds overlap with a shift of 1 ⁇ 2 wavelength.
- the two sounds are (1 / 2 ⁇
- a graph G5 representing a phenomenon that occurs when 1/16) wavelength shifts and overlaps is shown.
- FIG. 6C shows a graph G6 representing a phenomenon that occurs when two sounds overlap with a shift of (1 / 2-1 / 8) wavelength.
- time is taken on the horizontal axis
- normalized amplitude is taken on the vertical axis.
- the first sound is indicated by a dotted line L2
- the second sound that overlaps the first sound with a shift of 1 ⁇ 2 wavelength is indicated by a one-dot chain line L3.
- the sound is indicated by the solid line L4.
- the amplitudes of the two sounds are equal.
- the phase shift between the two sounds is 180 °, and they cancel each other out most.
- the amplitude of the synthesized sound becomes substantially zero.
- the second sound that overlaps the first sound indicated by the dotted line L2 with a shift of (1 / 2-1 / 16) wavelength is indicated by the alternate long and short dash line L5.
- the amplitudes of the two sounds are equal. Even in such a state, the phase shift between the two sounds is close to 180 ° and cancels out until the amplitude of the synthesized sound is about 1 ⁇ 2 or less.
- the second sound that overlaps the first sound indicated by the dotted line L2 with a shift of (1 / 2-1 / 8) wavelength is indicated by the alternate long and short dash line L7. Is indicated by a solid line L8. Also here, it is assumed that the amplitudes of the two sounds are equal. In this state, the phase difference between the two sounds is far from 180 °, and the amplitude of the synthesized sound is not so attenuated.
- the above equation (1) indicates that the length RL1 of the propagation path difference R1 is such that the phase shift between the two sounds is close to 180 ° at least to the extent shown in FIG. I mean.
- the sound absorbing material 30 is disposed in the above-described range Ar2 where the length RL1 of the propagation path difference R1 is such a length. That is, the former sound is within the range Ar2 in which the phase difference between the sound of the overlapping frequency from the loudspeaker unit 20 and the sound reflected by the surface of the bass diaphragm 11 of the bass speaker unit 10 is close to 180 °.
- a sound absorbing material 30 that absorbs sound is disposed.
- a sound absorbing material 30 is arranged.
- the wavelength ⁇ corresponding to the overlap frequency is 85 mm.
- the length RL1 of the propagation path difference R1 expressed by the equation (1) is 42.5 ⁇ 5.3 mm.
- the overlap frequency is 4 kHz.
- the propagation path difference R ⁇ b> 1 extends substantially horizontally from the apex of the dome-shaped treble diaphragm 21, and the bass vibration is near the upper edge of the treble frame 22.
- the path is bent to the opening 11a side of the plate 11 and reaches the surface of the low-frequency diaphragm 11 and the path reflected by the surface of the high-frequency diaphragm 21 to reach the same height as the first diaphragm. .
- This propagation path difference R1 corresponds to an example of the propagation path difference referred to in the present invention.
- the length RL1 of the propagation path difference R1 is 41.8 mm, and in order to improve the appearance, the inner periphery of the opening 11a of the low-frequency diaphragm 11 is close to the inner periphery.
- the sound absorbing material 30 is arranged. However, although it is slightly inferior in appearance, a sound absorbing material may be arranged at a position away from the opening 11a of the low-frequency diaphragm 11 at a position that satisfies the above-described condition for the propagation path difference.
- FIG. 7 is a diagram showing another example of the composite speaker device in which the sound absorbing material is disposed at a position away from the opening of the bass diaphragm.
- FIG. 7 shows another example of the composite speaker device 5 in a cross-sectional view equivalent to the cross-sectional view of FIG. However, in FIG. 7, only the right half in the figure is shown. Further, the composite speaker device 5 of this other example is equivalent to the composite speaker device 1 shown in FIG. 1 except for the location where the sound absorbing material 51 is disposed.
- the same components as those shown in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and redundant description of those equivalent components will be omitted below.
- the sound propagation path R2 from the high sound diaphragm 21 of the high sound speaker unit 20 extends substantially horizontally from the apex of the dome-shaped high sound diaphragm 21, and the high sound frame 22 is obtained.
- This is a path that passes through the vicinity of the upper edge and reaches the surface of the diaphragm 11 for bass.
- the propagation path R2 is a path that goes to a location away from the opening 11a of the diaphragm 11 for bass.
- the propagation path R2 is a propagation path difference.
- the high-pitched speaker unit 20 is provided so as to protrude in the sound radiation direction D1 from the high-pitched speaker unit 20 shown in FIG. 1 or FIG.
- the propagation path difference R3 of the sound from the loudspeaker speaker unit 20 is slightly longer than the propagation path difference R1 shown in FIG. 1 and the propagation path difference R2 shown in FIG.
- the propagation path difference R3 shown in FIG. 8 extends substantially horizontally from the apex of the dome-shaped treble diaphragm 21, and moves toward the opening 11a side of the bass diaphragm 11 near the upper edge of the treble frame 22. The path is bent to reach the surface of the diaphragm 11 for bass.
- the sound absorbing material 61 in this other example also corresponds to an example of the sound absorbing material referred to in the present invention.
- the propagation path difference R3 in this other example also corresponds to an example of the propagation path difference referred to in the present invention.
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- Otolaryngology (AREA)
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Abstract
Description
RL1=(2n+1)×λ(1/2±1/16)・・・(1)
(1)式における「λ」は重なり周波数に対応する波長であり、「n」は自然数である。
10,16 低音用スピーカユニット
11,16a 低音用振動板
11a 開口
12 低音用フレーム
13 低音用ダンパ
14 低音用ボイスコイル
15 低音用磁気回路
20,26 高音用スピーカユニット
21,26a 高音用振動板
22 高音用フレーム
23 高音用ダンパ
24 高音用ボイスコイル
25 高音用磁気回路
30,35,36,51,61 吸音材
Claims (9)
- 第1の振動板を有する第1のスピーカユニットと、
前記第1の振動板の音放射方向に設置された、前記第1の振動板より径が小さい第2の振動板を有する第2のスピーカユニットと、
を備え、
前記第1の振動板の音放射方向の表面には、前記第2の振動板を囲むように吸音材が配置されていることを特徴とする複合スピーカ装置。 - 前記第1のスピーカユニットの軸と前記第2のスピーカユニットの軸とが一致していることを特徴とする請求項1に記載の複合スピーカ装置。
- 前記吸音材が、円環状の形状を有していることを特徴とする請求項2に記載の複合スピーカ装置。
- 前記第1の振動板の中心部に開口が形成され、
前記第2の振動板の径は前記開口の径よりも小さいことを特徴とする請求項2に記載の複合スピーカ装置。 - 前記開口の周囲に前記吸音材が配置されていることを特徴とする請求項4に記載の複合スピーカ装置。
- 前記第1のスピーカユニットと前記第2のスピーカユニットとの双方から互いに同周波で放射される音の周波数である重なり周波数に対応する波長をλで表記し、自然数をnで表記したとき、
前記第1の振動板の音放射方向の表面のうち、前記第2の振動板の音放射方向の表面から前記第1の振動板の音放射方向の表面に伝搬して反射した音の伝搬経路と前記第2の振動板の音放射方向の表面から放射する音の伝搬経路との伝搬経路差の長さが(2n+1)×λ(1/2±1/16)となる箇所を含む設置範囲内に、少なくとも1箇所に前記吸音材が配置されていることを特徴とする請求項1に記載の複合スピーカ装置。 - 前記第1の振動板の音放射方向の表面のうち、前記伝搬経路差の長さが(2n+1)×λ(1/2-1/16)~(2n+1)×λ(1/2+1/16)となる範囲内に、少なくとも1箇所に前記吸音材が配置されていることを特徴とする請求項6に記載の複合スピーカ装置。
- 前記第1の振動板の音放射方向の表面のうち、前記伝搬経路差の長さが(2n+1)×λ(1/2)となる箇所の近傍に、少なくとも1箇所に前記吸音材が配置されていることを特徴とする請求項7に記載の複合スピーカ装置。
- 前記自然数nが0であることを特徴とする請求項8に記載の複合スピーカ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2016535619A JP6340427B2 (ja) | 2014-07-25 | 2014-07-25 | 複合スピーカ装置 |
EP14898320.8A EP3174311A4 (en) | 2014-07-25 | 2014-07-25 | Composite speaker device |
PCT/JP2014/069754 WO2016013122A1 (ja) | 2014-07-25 | 2014-07-25 | 複合スピーカ装置 |
Applications Claiming Priority (1)
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PCT/JP2014/069754 WO2016013122A1 (ja) | 2014-07-25 | 2014-07-25 | 複合スピーカ装置 |
Publications (1)
Publication Number | Publication Date |
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WO2016013122A1 true WO2016013122A1 (ja) | 2016-01-28 |
Family
ID=55162674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/069754 WO2016013122A1 (ja) | 2014-07-25 | 2014-07-25 | 複合スピーカ装置 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3174311A4 (ja) |
JP (1) | JP6340427B2 (ja) |
WO (1) | WO2016013122A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2021119914A1 (zh) * | 2019-12-16 | 2021-06-24 | 瑞声声学科技(深圳)有限公司 | 一种振膜及扬声器 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4497981A (en) * | 1982-06-01 | 1985-02-05 | Harman International Industries Incorporated | Multi-driver loudspeaker |
US5295194A (en) * | 1989-06-05 | 1994-03-15 | Christensen Eugene J | Multi-driver loudspeaker assembly |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19728329C2 (de) * | 1997-07-03 | 1999-05-27 | Wolfgang Seikritt | Lautsprecheranordnung |
JP2008263257A (ja) * | 2007-04-10 | 2008-10-30 | Matsushita Electric Ind Co Ltd | 複合型スピーカ |
ATE463132T1 (de) * | 2007-08-14 | 2010-04-15 | Klaus Reck | Koaxiallautsprecher |
-
2014
- 2014-07-25 JP JP2016535619A patent/JP6340427B2/ja not_active Expired - Fee Related
- 2014-07-25 EP EP14898320.8A patent/EP3174311A4/en not_active Withdrawn
- 2014-07-25 WO PCT/JP2014/069754 patent/WO2016013122A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4497981A (en) * | 1982-06-01 | 1985-02-05 | Harman International Industries Incorporated | Multi-driver loudspeaker |
US5295194A (en) * | 1989-06-05 | 1994-03-15 | Christensen Eugene J | Multi-driver loudspeaker assembly |
Non-Patent Citations (1)
Title |
---|
See also references of EP3174311A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP3174311A4 (en) | 2018-02-28 |
JP6340427B2 (ja) | 2018-06-06 |
JPWO2016013122A1 (ja) | 2017-05-25 |
EP3174311A1 (en) | 2017-05-31 |
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