WO2015029303A1 - スピーカ装置 - Google Patents
スピーカ装置 Download PDFInfo
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- WO2015029303A1 WO2015029303A1 PCT/JP2014/003578 JP2014003578W WO2015029303A1 WO 2015029303 A1 WO2015029303 A1 WO 2015029303A1 JP 2014003578 W JP2014003578 W JP 2014003578W WO 2015029303 A1 WO2015029303 A1 WO 2015029303A1
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- speaker unit
- speaker
- pass filter
- sound
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- 230000005236 sound signal Effects 0.000 description 13
- 230000007423 decrease Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000013139 quantization Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Classifications
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- 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
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- 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
- H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only using transducers reproducing the same frequency band
-
- 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
- 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
- H04R1/26—Spatial arrangements of separate transducers responsive 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
-
- 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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/028—Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
- H04R2205/022—Plurality of transducers corresponding to a plurality of sound channels in each earpiece of headphones or in a single enclosure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
- H04R3/14—Cross-over networks
Definitions
- the present disclosure relates to a speaker device.
- a speaker device including a plurality of speaker units that output sound has been proposed (see, for example, Patent Documents 1 and 2 below).
- the directivity deteriorates as it goes into the high sound range (high frequency), and the acoustic energy is insufficient, and the listening range (listening area) in the high frequency tends to be narrowed. was there.
- this disclosure is intended to expand the listening range at high frequencies.
- a first speaker unit and a second speaker unit for reproducing at least a high-frequency sound are arranged on a plane having horizontal and vertical directions as axes, The first speaker unit is arranged so as to face the horizontal front, The second speaker unit is disposed so as to face a vertically upward direction that forms approximately 90 degrees with respect to the first speaker unit.
- Y ⁇ aX + b (where a> 0, b> 0, X> 0, Y> 0)
- the listening range of the high frequency sound can be expanded.
- the effects described here are not necessarily limited, and may be any effects described in the present disclosure.
- the contents of the present disclosure are not construed as being limited by the exemplified effects in the following description.
- FIG. 6A is a diagram for explaining an example of filter characteristics
- FIG. 6B is a diagram for explaining a signal that has passed through the filter.
- FIG. 11A is a diagram for explaining an example of filter characteristics
- FIG. 11B is a diagram for explaining a signal that has passed through the filter.
- the front (front) direction in the horizontal direction is appropriately referred to as the horizontal front
- the rear in the horizontal direction That is, the depth direction of the speaker device is appropriately referred to as horizontal rear.
- the upward direction in the vertical direction of the speaker device orthogonal to the horizontal direction is appropriately referred to as a vertically upward direction
- the downward direction of the speaker device in the vertical direction is appropriately referred to as a vertically downward direction.
- the definition of these directions is for convenience to explain the relative positional relationship between the first speaker unit and the second speaker unit, which will be described later, and the contents of the present disclosure are limited to these directions. is not.
- the predetermined plane on which the speaker is placed is not limited to a horizontal surface, and may be a surface having an inclination, for example.
- FIG. 1 is a perspective view showing an example of the appearance of the speaker device according to the first embodiment.
- the speaker device 1 includes an enclosure 101 and a plurality of speaker units provided in the enclosure 101.
- a known system such as a bass reflex type, a back load horn type, or an acoustic pipe type can be applied.
- the enclosure 101 has an upper surface (top surface) 102, a bottom surface 103, and side surfaces.
- the top surface 102 and the bottom surface 103 have a substantially bullet-like shape with a width that slightly decreases in the depth direction of the speaker device 1.
- the side surface of the speaker device 1 includes a curved curved side surface 104 and a mounting plane 105 that is widened toward the horizontal front side and vertically downward.
- a planar side surface 106 and a planar side surface 107 are formed on both sides of the mounting plane 105 so as to form a predetermined angle with respect to the mounting plane 105.
- a side surface of the speaker device 1 is continuously formed by the mounting plane 105, the planar side surface 106, the curved side surface 104, and the planar side surface 107.
- the speaker device 1 is, for example, a speaker unit 110 (an example of a second speaker unit), a speaker unit 111 (an example of a first speaker unit), and a speaker unit 112 (a third speaker unit) as speaker units that reproduce sound.
- a speaker unit an example of a speaker unit
- a speaker unit 113 an example of a fourth speaker unit.
- the sound includes various sounds such as a human voice and music that are heard by a human ear.
- the speaker unit 110 and the speaker unit 111 are provided in the speaker device 1 as a tweeter that reproduces high-frequency sound.
- the high frequency band is a relatively high frequency band in an audible band (for example, 20 Hz (hertz) to 20 kHz).
- the speaker unit 110 and the speaker unit 111 reproduce sound including a band of 10 kHz (kilohertz) or more.
- the speaker unit 112 is provided in the speaker device 1 as a standard tweeter.
- the term “standard” means that the size of the diaphragm of the speaker unit 112 is substantially the same as the size of the standard diaphragm of the tweeter, and does not have any special meaning beyond that.
- the speaker unit 113 is provided in the speaker device 1 as a woofer. The speaker unit 112 and the speaker unit 113 reproduce sound including a band lower than the sound band reproduced by the speaker unit 110 and the speaker unit 111.
- the speaker unit 111, the speaker unit 112, and the speaker unit 113 are arranged on the mounting plane 105 so as to be aligned in the vertical direction.
- a speaker unit 113, a speaker unit 112, and a speaker unit 111 are sequentially provided from a vertically downward direction to a vertically upward direction.
- the speaker unit 111, the speaker unit 112, and the speaker unit 113 are arranged so as to face horizontally forward.
- the speaker device 1 is used with the speaker unit 111, the speaker unit 112, and the speaker unit 113 directed toward the listener.
- the speaker unit 110 is provided on the upper surface 102.
- the speaker unit 110 is disposed so as to face a vertically upward direction that forms approximately 90 degrees with respect to the speaker unit 111, and is provided at a position adjacent to the speaker unit 111 on the upper surface 102.
- the speaker unit 110 and the speaker unit 111 in one embodiment each have a diaphragm having the same diameter (effective diameter) and the same shape.
- the speaker unit 110 and the speaker unit 111 have, for example, a diameter of 22 mm (millimeters) or less and have dome-shaped diaphragms, respectively. In this example, the description will be made assuming that the diameter of the diaphragm is 19 mm. Of course, other shapes of diaphragms (for example, ribbon type) may be used.
- the speaker unit 112 has, for example, a dome-shaped diaphragm having a diameter of 25 mm.
- the speaker unit 113 includes, for example, a cone-shaped diaphragm having a diameter of 13 cm (centimeter).
- Directional of speaker system 2 to 4 are graphs showing sound pressure levels with respect to frequency.
- the horizontal axis in the graph indicates the frequency, and the vertical axis indicates the sound pressure level.
- FIG. 2 shows the sound pressure level of the sound output from the speaker device 1, and the frequencies at angles of 0 degrees (front), 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees and 60 degrees in the vertical direction are shown.
- FIG. 3 shows the sound pressure level of the sound output from the speaker device 1, and the angle in the horizontal direction is 0 degrees (front), 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees and 60 degrees with respect to the frequency. Indicates the sound pressure level.
- FIG. 4 shows the sound pressure level of the sound output from the speaker unit 112 alone.
- the speaker unit 112 having a diaphragm with a diameter of 25 mm for example, when the frequency becomes 10 kHz or more, the sound pressure level rapidly decreases.
- the speaker device 1 using the speaker units 110 and 111 having a small diaphragm diameter for example, 19 mm
- the sound pressure level gradually decreases even when the frequency is 10 kHz or higher. That is, by using a speaker unit having a small diaphragm (for example, a diameter of 22 mm or less) with respect to the speaker device 1, excellent directivity in a high range can be realized.
- FIG. 5 shows an example of the network configuration of the speaker device 1.
- one of the two-channel (LR) sound signals is input to the positive terminal 141 and the negative terminal 142.
- the sound signal may be read from a storage medium such as a CD (Compact Disc) or a hard disk, or may be supplied via a network such as the Internet. Further, it may be a sound signal transferred from a portable playback device.
- a storage medium such as a CD (Compact Disc) or a hard disk
- a network such as the Internet.
- it may be a sound signal transferred from a portable playback device.
- the sound signal input to the positive terminal 141 and the negative terminal 142 has, for example, a sampling frequency of 44.1 kHz or more and a quantization bit number of 16 bits or more.
- a sound signal may be referred to as a high-resolution sound source (abbreviation for high-resolution sound source).
- a sound signal with a sampling frequency of 96 Hz and a quantization bit number of 24 bits and a sound signal with a sampling frequency of 192 Hz and a quantization bit number of 24 bits.
- the sound signal S 1 input to the speaker device 1 is branched and passed to a low-pass filter (LPF (Low Pass Filter)) 150, a high-pass filter (HPF (High Pass Filter)) 151, a high-pass filter 152, and a high-pass filter 153. Supplied against.
- LPF Low Pass Filter
- HPF High Pass Filter
- the low pass filter 150 is connected to the speaker unit 113.
- the high pass filter 151 is connected to the speaker unit 112.
- a high pass filter 152 which is an example of a first high pass filter, is connected to the speaker unit 111.
- a high-pass filter 153 that is an example of a second high-pass filter is connected to the speaker unit 110.
- FIG. 6A is a characteristic diagram schematically showing the characteristics of each filter.
- the reference symbol a10 indicates the characteristic of the low-pass filter 150
- the reference symbol b10 indicates the characteristic of the high-pass filter 151
- the reference symbol c10 indicates the characteristic of the high-pass filter 152
- the reference symbol d10 indicates the characteristic of the high-pass filter 153.
- FIG. 6B schematically shows sound that passes through each filter and is reproduced by each speaker unit. 6A and 6B, the horizontal axis indicates the frequency, and the vertical axis indicates the sound pressure level.
- reference symbol a11 indicates a sound reproduced from the speaker unit 113
- reference symbol b11 indicates a sound reproduced from the speaker unit 112
- reference symbol c11 indicates a sound reproduced from the speaker unit 111
- reference symbol d11 indicates a sound reproduced from the speaker unit 110.
- the cut-off frequency of each filter is appropriately set so as to prevent a decrease (dip) in the sound pressure level in a specific frequency band. Further, in this example, the cut-off frequency of each filter is appropriately set so as to prevent interference between the speaker units in consideration of the balance of acoustic energy.
- the cutoff frequency of the high-pass filter 152 connected to the speaker unit 111 is set to around 20 kHz, for example, 18 kHz.
- the sound pressure level of the sound output from the speaker unit 112 and the sound pressure level of the sound output from the speaker unit 111 can be continuously connected, and the sound pressure level is reduced near 20 kHz. It can be prevented from occurring.
- the cut-off frequency of the high-pass filter 152 and the cut-off frequency of the high-pass filter 153 are further made different so that the reproduction bands that the speaker unit 111 and the speaker unit 110 are responsible for are different.
- the cutoff frequency of the high pass filter 153 is set to be higher than the cutoff frequency of the high pass filter 152.
- the sound pressure level of the sound reproduced from the speaker unit 111 is lowered and the directivity is deteriorated when the frequency is in the range of 45 degrees or more in the vertical direction and 45 degrees or more in the horizontal direction near 20 kHz. Therefore, as described above, when the cutoff frequency of the high-pass filter 152 is set to 18 kHz, the cutoff frequency of the high-pass filter 153 is set to 22 kHz, for example.
- the sound reproduced by the speaker unit 110 can supplement acoustic energy in a band where the directivity of the speaker unit 111 deteriorates.
- by making the reproduction bands that the speaker unit 111 and the speaker unit 110 handle differently it is possible to prevent interference between the speaker unit 111 and the speaker unit 110 and a decrease in sound quality.
- a band pass filter (BPF (Band Pass Filter) may be connected to the speaker unit 112. However, passing the band pass filter causes the phase of the sound signal to rotate, resulting in a phase shift. In order to prevent this, preferably, a high-pass filter is connected to the speaker unit 112.
- BPF Band Pass Filter
- Example of speaker unit position A preferred arrangement position of the speaker unit 110 with respect to the speaker unit 111 will be described.
- the speaker unit 110 and the speaker unit 111 are arranged on a plane having the horizontal direction and the vertical direction of the speaker device 1 as axes.
- a predetermined position of the speaker unit 111 is arranged at the origin of the plane.
- the center of the fixed surface (diaphragm fixing surface) that fixes the diaphragm of the speaker unit 111 is arranged at the origin of the plane.
- FIG. 7 shows the results of the test.
- the speaker unit 110 is disposed vertically upward and horizontally rearward with respect to the speaker unit 111.
- Each rectangular frame indicates a test position of the speaker unit 110, and a rectangle with a circle indicates a preferable position of the speaker unit 110 in terms of hearing.
- the positions of the speaker units 110 that are preferable for hearing are collected in a certain range of positions. Note that “preferable from the viewpoint of hearing” means that, for example, a high-frequency sound can be heard clearly to some extent.
- FIG. 8 shows a graph that approximates the position of the speaker unit 110, which is preferable for hearing, by a straight line.
- a plane with the X axis as the horizontal rear and the Y axis as the vertical direction is set.
- the diaphragm and the diaphragm fixing surface of the speaker unit 111 are schematically shown by reference numerals 111a and 111b, respectively.
- the diaphragm and the diaphragm fixing surface of the speaker unit 110 are schematically indicated by reference numerals 110a and 110b, respectively.
- the position of the speaker unit 110 that is preferable for hearing can be approximated by, for example, the following equation (1).
- Y ⁇ aX + b (where a> 0, b> 0, X> 0, Y> 0) (1)
- the position of the speaker unit 110 defined by the expression (1) is a position close to the speaker unit 111 in the vertically upward direction and in the horizontal rear direction. Further, the values of a and b in the formula (1) are preferably set in the following ranges. The unit of a and b is millimeter. 0.85 ⁇ a ⁇ 1.9 46 ⁇ b ⁇ 105
- the speaker device 1 of the embodiment it is possible to clearly reproduce the high frequency sound and to expand the listening range of the high frequency sound. For this reason, the speaker device in the embodiment can cope with listening to sound while performing other work (for example, housework while standing) or listening to sound at a position off the front of the speaker device.
- the directivity can be improved by adding a small and highly directional upward tweeter speaker unit.
- high-frequency acoustic energy can be supplemented by the upward tweeter speaker unit, and the acoustic energy of each band can be satisfied in a balanced manner in the listening room.
- the listening position can be expanded by improving the sound spread. For example, when reproducing a high-quality sound source such as a high-resolution sound source, it is possible to expand an area where music can be enjoyed even at a position off the front of the speaker device.
- FIG. 9 is a perspective view showing an example of the appearance of the speaker device according to the second embodiment.
- the speaker device 2 includes an enclosure 201 that has substantially the same shape as the enclosure 201 of the speaker device 1 and a plurality of speaker units provided in the enclosure 201.
- As the enclosure 201 a known system such as a bass reflex type, a back load horn type, or an acoustic pipe type can be applied.
- the enclosure 201 has an upper surface 202, a bottom surface 203, and side surfaces.
- the top surface 202 and the bottom surface 203 have a substantially bullet shape with a width that slightly decreases in the depth direction of the speaker device 2.
- the side surface of the speaker device 2 includes a curved side surface 204 that is curved and a mounting plane 205 that is widened toward the front in the horizontal direction and downward in the vertical direction.
- a planar side surface 206 and a planar side surface 207 are formed on both sides of the mounting plane 205 so as to form a predetermined angle with respect to the mounting plane 205.
- a side surface of the speaker device 2 is continuously formed by the mounting plane 205, the planar side surface 206, the curved side surface 204, and the planar side surface 207.
- the speaker device 2 includes, for example, a speaker unit 210, a speaker unit 211, and a speaker unit 213 as speaker units that reproduce sound.
- the speaker unit 210 and the speaker unit 211 are provided in the speaker device 2 as a tweeter that reproduces high-frequency sound.
- the speaker unit 210 has a configuration corresponding to the speaker unit 210 in the first embodiment.
- the speaker unit 211 has a configuration corresponding to the speaker unit 211 in the first embodiment.
- the speaker unit 211 is provided in the speaker device 2 as a speaker that reproduces a full-range sound.
- the speaker unit 211 has, for example, a 10 cm diaphragm.
- FIG. 10 shows an example of a network configuration of the speaker device 2.
- the positive terminal 241 and the negative terminal 242 receive, for example, one of the two-channel (LR) stereo signals. Note that the sound signal input to the positive terminal 241 and the negative terminal 242 has been subjected to various known signal processing and amplification processing in the previous stage.
- LR two-channel
- the sound signal S1 input to the speaker device 2 is branched and supplied to the low-pass filter 250, the high-pass filter 251, and the high-pass filter 252, respectively.
- the low pass filter 250 is connected to the speaker unit 213.
- the high pass filter 251 is connected to the speaker unit 211.
- the high pass filter 252 is connected to the speaker unit 210.
- FIG. 11A is a characteristic diagram schematically showing the characteristics of each filter.
- reference symbol a20 indicates the characteristic of the low-pass filter 250
- reference symbol b20 indicates the characteristic of the high-pass filter 251
- reference symbol c20 indicates the characteristic of the high-pass filter 252.
- FIG. 11B schematically shows sound that passes through each filter and is reproduced by each speaker unit.
- the horizontal axis indicates the frequency
- the vertical axis indicates the sound pressure level.
- reference symbol a21 indicates a sound reproduced from the speaker unit 213
- reference symbol b21 indicates a sound reproduced from the speaker unit 211
- reference symbol c21 indicates a sound reproduced from the speaker unit 210.
- the cut-off frequency of each filter is appropriately set so as to prevent a decrease (dip) in the sound pressure level in a specific frequency band.
- the cutoff frequency of the high-pass filter 251 is set, for example, in the vicinity of a frequency band where the sound pressure level of the sound that has passed through the low-pass filter 250 decreases. Thereby, the sound pressure level of the sound output from the speaker unit 213 and the sound pressure level of the sound output from the speaker unit 111 can be continuously connected.
- the cutoff frequency of the filter is appropriately set so as to prevent interference between the speaker unit 210 and the speaker unit 211 while supplementing acoustic energy in a band where the directivity of the speaker unit 213 deteriorates.
- the cut-off frequency of the high-pass filter 251 and the cut-off frequency of the high-pass filter 252 are made different so that the reproduction bands that are handled by the speaker unit 211 and the speaker unit 210 are made different.
- the cutoff frequency of the high-pass filter 252 is set to be higher than the cutoff frequency of the high-pass filter 251.
- the number of speaker units provided for the speaker device can be changed as appropriate.
- An inclined surface that is removed at approximately 45 degrees may be formed on a part of the periphery of the upper surface of the speaker device in the embodiment described above.
- an inclined surface 118 (see FIG. 1) that is removed at approximately 45 degrees with respect to the upper surface 102 and the mounting plane 105 may be formed between the upper surface 102 and the mounting plane 105.
- an inclined surface 118 removed by approximately 45 degrees with respect to the upper surface 102 and each planar side surface may be formed.
- these formed inclined surfaces may be called C chamfering.
- this inclined surface By forming the inclined surface, diffraction by the baffle plate can be reduced, and deterioration of sound quality such as sound dust can be prevented.
- this inclined surface can also be formed in the speaker device in the second embodiment.
- the sound pressure level of the sound reproduced from the speaker unit 110 may be made smaller than the sound pressure level of the sound reproduced from the speaker unit 111. Good.
- the present disclosure can be realized by a method, a program, a system, or the like without being limited to an apparatus.
- the program can be provided to the user via, for example, a network or a portable memory such as an optical disk or a semiconductor memory.
- This indication can also take the following composition.
- a first speaker unit and a second speaker unit for reproducing at least a high-frequency sound The first speaker unit and the second speaker unit are arranged on a plane with the horizontal direction and the vertical direction as axes, The first speaker unit is disposed so as to face horizontally forward, The second speaker unit is disposed so as to face a vertically upward direction that forms approximately 90 degrees with respect to the first speaker unit.
- the second speaker unit is The speaker apparatus which has the structure by which the said 2nd speaker unit is arrange
- positioned so that the coordinate of the center of the diaphragm fixed surface to have may be located on the straight line represented by the following formula in the said plane.
- Y ⁇ aX + b (where a> 0, b> 0, X> 0, Y> 0) (2) A first high pass filter connected to the first speaker unit; A second high pass filter connected to the second speaker unit, The speaker device according to (1), wherein a cutoff frequency of the first high-pass filter and a cutoff frequency of the second high-pass filter are set to different values. (3) The speaker device according to (2), wherein a cutoff frequency of the second high-pass filter is set to a value greater than a cutoff frequency of the first high-pass filter. (4) The speaker device according to any one of (1) to (3), wherein the values of a and b in the formula are set to values in the following range.
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- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Circuit For Audible Band Transducer (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Description
少なくとも高域の音を再生する、第1のスピーカユニットおよび第2のスピーカユニットを有し、
第1のスピーカユニットおよび第2のスピーカユニットは、水平方向および鉛直方向を軸とする平面上に配置され、
第1のスピーカユニットは、水平前方を向くように配置され、
第2のスピーカユニットは、第1のスピーカユニットに対して略90度をなす鉛直上方向を向くように配置され、
第1のスピーカユニットが有する振動板固定面の中心を平面における原点に配置し、且つ、水平後方をXと設定し鉛直上方向をYと設定した場合に、第2のスピーカユニットが有する振動板固定面の中心の座標が、平面における下記の式により表される直線上に位置するように、第2のスピーカユニットが配置された構成を有するスピーカ装置である。
(式)Y=-aX+b(但し、a>0,b>0,X>0,Y>0)
<1.第1の実施形態>
<2.第2の実施形態>
<3.変形例>
以下に説明する実施形態等は本開示の好適な具体例であり、本開示の内容がこれらの実施形態等に限定されるものではない。
「スピーカ装置の外観の一例」
図1は、第1の実施形態におけるスピーカ装置の外観の一例を示す斜視図である。スピーカ装置1は、エンクロージャー101と、エンクロージャー101に設けられた複数のスピーカユニットとを有する。エンクロージャー101としては、バスレフ型、バックロードホーン型、音響パイプ型など公知の方式を適用することができる。
図2乃至図4は、周波数に対する音圧レベルを示すグラフである。グラフにおける横軸は周波数を示し、縦軸は音圧レベルを示している。
図5は、スピーカ装置1のネットワークの構成の一例を示す。正端子141および負端子142には、例えば、2チャンネル(LR)の音の信号のうちのいずれかの音の信号が入力される。なお、詳細な説明は省略するが、正端子141および負端子142に入力される音の信号は、前段において種々の公知の信号処理や増幅処理が施されたものである。音の信号は、CD(Compact Disc)やハードディスク等の記憶媒体から読み出されたものでもよく、インターネット等のネットワークを介して供給されたものでもよい。また、携帯型の再生機器から転送された音の信号であってもよい。
スピーカユニット111に対するスピーカユニット110の好ましい配置位置について説明する。スピーカユニット110およびスピーカユニット111は、スピーカ装置1の水平方向および鉛直方向を軸とする平面上に配置される。ここで、当該平面の原点にスピーカユニット111の所定位置を配置する。一例として、スピーカユニット111の振動板を固定する固定面(振動板固定面)の中心が当該平面の原点に配置される。
Y=-aX+b(但し、a>0,b>0,X>0,Y>0)・・・(1)
0.85≦a≦1.9
46≦b≦105
次に、第2の実施形態について説明する。なお、技術的な矛盾が生じない範囲で、第2の実施形態に対して第1の実施形態で説明した事項を適用することができる。
図10は、スピーカ装置2のネットワークの構成の一例を示す。正端子241および負端子242には、例えば、2チャンネル(LR)のステレオ信号のいずれか一方の音の信号が入力される。なお、正端子241および負端子242に入力される音の信号は、前段において種々の公知の信号処理や増幅処理が施されたものである。
以上、本開示の複数の実施形態について具体的に説明したが、本開示は、上述した複数の実施形態に限定されるものではなく、本開示の技術的思想に基づく各種の変形が可能である。
(1)
少なくとも高域の音を再生する、第1のスピーカユニットおよび第2のスピーカユニットを有し、
前記第1のスピーカユニットおよび前記第2のスピーカユニットは、水平方向および鉛直方向を軸とする平面上に配置され、
前記第1のスピーカユニットは、水平前方を向くように配置され、
前記第2のスピーカユニットは、前記第1のスピーカユニットに対して略90度をなす鉛直上方向を向くように配置され、
前記第1のスピーカユニットが有する振動板固定面の中心を前記平面における原点に配置し、且つ、水平後方をXと設定し鉛直上方向をYと設定した場合に、前記第2のスピーカユニットが有する振動板固定面の中心の座標が、前記平面における下記の式により表される直線上に位置するように、前記第2のスピーカユニットが配置された構成を有するスピーカ装置。
(式)Y=-aX+b(但し、a>0,b>0,X>0,Y>0)
(2)
前記第1のスピーカユニットに対して接続される第1のハイパスフィルタと、
前記第2のスピーカユニットに対して接続される第2のハイパスフィルタと
を有し、
前記第1のハイパスフィルタのカットオフ周波数と前記第2のハイパスフィルタのカットオフ周波数とが異なる値に設定された
(1)に記載のスピーカ装置。
(3)
前記第2ハイパスフィルタのカットオフ周波数が前記第1のハイパスフィルタのカットオフ周波数より大きい値に設定された
(2)に記載のスピーカ装置。
(4)
前記式におけるaおよびbの値が、下記の範囲の値に設定される
(1)乃至(3)のいずれかに記載のスピーカ装置。
0.85≦a≦1.9 46≦b≦105 (単位:ミリメートル)
(5)
前記第1のスピーカユニットおよび前記第2のスピーカユニットは、同一の有効直径を有し同一の形状とされる振動板をそれぞれ有する
(1)乃至(4)のいずれかに記載のスピーカ装置。
(6)
前記第1のスピーカユニットおよび前記第2のスピーカユニットは、有効直径が22mm以下であるドーム状の振動板を、それぞれ有する
(5)に記載のスピーカ装置。
(7)
前記第1のスピーカユニットおよび前記第2のスピーカユニットは、10kHz以上の帯域を含む音を再生する
(1)乃至(6)のいずれかに記載のスピーカ装置。
(8)
前記第1のスピーカユニットおよび前記第2のスピーカユニットにより再生される音の帯域より低域を含む音を再生する、第3のスピーカユニットおよび第4のスピーカユニットを有し、
前記第3のスピーカユニットおよび前記第4のスピーカユニットは、前記第1のスピーカユニットに対して鉛直方向に整列されて配置される
(1)乃至(7)のいずれかに記載のスピーカ装置。
(9)
前記第1のスピーカユニットが配置される第1の面と前記第2のスピーカユニットが配置される第2の面との間に、前記第1の面および前記第2の面に対して略45度でもって除去された傾斜面が形成される
(1)乃至(8)のいずれかに記載のスピーカ装置。
110,111,112,113・・・スピーカユニット
152,153・・・ハイパスフィルタ
110b,111b・・・振動板固定面
Claims (9)
- 少なくとも高域の音を再生する、第1のスピーカユニットおよび第2のスピーカユニットを有し、
前記第1のスピーカユニットおよび前記第2のスピーカユニットは、水平方向および鉛直方向を軸とする平面上に配置され、
前記第1のスピーカユニットは、水平前方を向くように配置され、
前記第2のスピーカユニットは、前記第1のスピーカユニットに対して略90度をなす鉛直上方向を向くように配置され、
前記第1のスピーカユニットが有する振動板固定面の中心を前記平面における原点に配置し、且つ、水平後方をXと設定し鉛直上方向をYと設定した場合に、前記第2のスピーカユニットが有する振動板固定面の中心の座標が、前記平面における下記の式により表される直線上に位置するように、前記第2のスピーカユニットが配置された構成を有するスピーカ装置。
(式)Y=-aX+b(但し、a>0,b>0,X>0,Y>0) - 前記第1のスピーカユニットに対して接続される第1のハイパスフィルタと、
前記第2のスピーカユニットに対して接続される第2のハイパスフィルタと
を有し、
前記第1のハイパスフィルタのカットオフ周波数と前記第2のハイパスフィルタのカットオフ周波数とが異なる値に設定された
請求項1に記載のスピーカ装置。 - 前記第2ハイパスフィルタのカットオフ周波数が前記第1のハイパスフィルタのカットオフ周波数より大きい値に設定された
請求項2に記載のスピーカ装置。 - 前記式におけるaおよびbの値が、下記の範囲の値に設定される
請求項1に記載のスピーカ装置。
0.85≦a≦1.9 46≦b≦105 (単位:ミリメートル) - 前記第1のスピーカユニットおよび前記第2のスピーカユニットは、同一の有効直径を有し同一の形状とされる振動板をそれぞれ有する
請求項1に記載のスピーカ装置。 - 前記第1のスピーカユニットおよび前記第2のスピーカユニットは、有効直径が22mm以下であるドーム状の振動板を、それぞれ有する
請求項5に記載のスピーカ装置。 - 前記第1のスピーカユニットおよび前記第2のスピーカユニットは、10kHz以上の帯域を含む音を再生する
請求項1に記載のスピーカ装置。 - 前記第1のスピーカユニットおよび前記第2のスピーカユニットにより再生される音の帯域より低域を含む音を再生する、第3のスピーカユニットおよび第4のスピーカユニットを有し、
前記第3のスピーカユニットおよび前記第4のスピーカユニットは、前記第1のスピーカユニットに対して鉛直方向に整列されて配置される
請求項1に記載のスピーカ装置。 - 前記第1のスピーカユニットが配置される第1の面と前記第2のスピーカユニットが配置される第2の面との間に、前記第1の面および前記第2の面に対して略45度でもって除去された傾斜面が形成される
請求項1に記載のスピーカ装置。
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CN201480044473.XA CN105453586A (zh) | 2013-08-30 | 2014-07-07 | 扬声器装置 |
EP14839574.2A EP3041264A4 (en) | 2013-08-30 | 2014-07-07 | Speaker device |
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USD921616S1 (en) * | 2018-08-06 | 2021-06-08 | Genelec Oy | Stand for a loudspeaker |
USD936038S1 (en) * | 2019-11-29 | 2021-11-16 | Lg Electronics Inc. | Audio player |
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