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JPH11113081

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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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH11113081
[0001]
TECHNICAL FIELD The present invention relates to a speaker device.
[0002]
2. Description of the Related Art A conventional speaker comprises a cone-shaped diaphragm, a
transducer for vibrating the diaphragm, a diaphragm and an enclosure (speaker box) and a baffle
(a plate). The transducer is disposed at the center of the cone-shaped diaphragm and vibrates the
diaphragm based on the sound reproduction signal.
[0003]
Furthermore, flat type speakers having a flat diaphragm are also known. The cone-shaped
diaphragm is made of a relatively hard material and generates sound generally by piston
movement, whereas the flat diaphragm is made of a relatively soft material and generates sound
due to bending waves. For example, WO 97/09842 discloses a flat type speaker having a flat
diaphragm.
[0004]
03-05-2019
1
The conventional loudspeaker is placed on the floor, shelf or the like and is maintained in a fixed
position without changing the angle to the listener. In general, the speakers are placed at the
corners of a room or square and are not moved during use. If you want to change the direction of
the speaker, you can move the speaker by hand to change the position.
[0005]
The speaker is for listening to the sound generated from it, not for enjoying watching the
speaker. An object of the present invention is to provide a speaker device that can move a
speaker to provide visual effects and auditory changes.
[0006]
A loudspeaker device according to the invention comprises a rotating means, at least one
loudspeaker which can be moved by the rotating means, and a control means for controlling the
rotating means. It is At least one speaker is characterized in that it comprises a vibrator attached
to the rotating means, a transducer attached to the vibrator, and a signal generating means
connected to the transducer.
[0007]
In the above configuration, the speaker is moved by the rotating means. The speakers can be
moved to rotate continuously by means of a rotating means, in which case the rotating speakers
provide visual changes and can be enjoyed watching the speakers. Also, the speaker can be
moved at a predetermined angle by the rotation means, in which case the speaker can be
oriented in a predetermined direction.
[0008]
Preferably, the signal generation means comprises non-contact signal transmission means.
Therefore, even if the vibrating body of the speaker is rotated, a part of the signal generating
means of the speaker is not rotated but is stationary, and only the remaining portion is rotated.
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2
At this time, signal transmission can be performed without twisting of the electric wire. In
addition, the rotating portion of the speaker device can be formed lighter.
[0009]
Preferably, the loudspeaker is configured to obtain a visual change. For example, the vibrator of
the speaker can be irradiated with illumination, or the vibrator of the speaker can be decorated.
Preferably, the control means controls the rotation means to rotate the speaker continuously.
This results in visual changes as described above.
[0010]
Further, the housing of the speaker is formed of a transparent member. Alternatively, the housing
of the speaker reflects the light to be emitted. By doing so, visual changes can be further
enhanced. Preferably, the loudspeaker is weakly directional or omnidirectional. In this case, even
if a listener at a certain position listens to the sound emitted from the speaker, the quality change
in the sense of hearing is small, many people can hear the sound emitted from the speaker, and
the speaker rotates. The visual effect of being
[0011]
Preferably, the speaker is configured to be able to turn depending on the position of the listener.
A sensor is provided for detecting the position of the listener, and the orientation of the speaker
is changed according to the position detected by the sensor. A microphone is provided to detect
the position of the listener, and the orientation of the speaker is changed according to the
position detected using the microphone. Alternatively, the speaker is configured to be capable of
changing its direction in accordance with the acoustic characteristic of the space in which the
speaker is installed. Alternatively, the speaker can change the angle and change the number of
delayed samples of the output signal. It also presents specific auditory information in a specific
direction. Alternatively, while presenting specific auditory information in a specific direction,
visual information using a speaker as a display medium also presents specific content in a
specific direction.
[0012]
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3
Also, the direction is changed to a preset angle according to the information to be reproduced.
Also, by rotating the speakers having different sense of sound spread depending on the angle, the
sense of sound spread is changed. Further, by rotating a speaker having a different sense of
sound spread depending on the angle, the sense of sound spread is changed, and visual
information using the speaker as a display medium also presents specific contents in a specific
direction.
[0013]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing a first embodiment
of the present invention. The speaker device 10 comprises a motor 12 which is a rotation means,
a speaker 14 which can be moved by the motor 12, and a control means 20 which controls the
motor 12. The speaker 14 comprises a vibrating body 14 attached to a shaft 12 a operatively
connected to the motor 12, a transducer 16 attached to the vibrating body 14, and signal
generating means 18 connected to the transducer 16. The signal generation means 18
reproduces a music signal and an audio signal. The transducer 16 is driven by the reproduction
signal of the reproduction signal generating means 18, and vibrates the vibrator 14 to generate
sound.
[0014]
2 and 3 show an example of the vibrating body 14 and the transducer 16 attached thereto. The
vibrating body 14 has a configuration similar to a flat diaphragm of a flat type speaker, and can
be made of a carbon cloth, a paper of honeycomb structure, or a sheet of metal. The transducer
16 is of the type having a voice coil 22 and a permanent magnet 24. The voice coil 22 is fixed to
the vibrating body 14. The permanent magnet 24 is attached to the yoke 26, and the yoke 26 is
attached to the frame 30 via the buffer 28. Also, the frame 30 is fixed to the vibrating body 14
via the buffer material 32 at a point different from the fixing point of the voice coil 22 to the
vibrating body 14.
[0015]
When current flows from the reproduction signal generating means 18 to the voice coil 22,
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4
relative motion occurs between the voice coil 22 and the permanent magnet 24, and the vibrator
14 vibrates due to the relative motion. The vibrating body 14 generates a sound as shown by the
arrow in FIG. The operation of such a transducer 16 is known, and any type of transducer 16
other than that shown can be used.
[0016]
FIG. 4 is a view showing another example of the vibrating body 14. The vibrating body 14
comprises two thin tubes 34, 36 fixed in a lattice. These thin tubes 34, 36 are formed by
rounding a sheet of the same material as the vibrator 14 of FIGS. 2 and 3 in a cylindrical shape,
and vibrate by the transducer 16 to generate sound. In this example, the transducer 16 is
attached to only one capillary. The two capillaries 34, 36 are connected to one another, for
example by means of an adhesive, so that the vibrations of the capillaries 34 are transmitted to
the capillaries 36. Thus, the two capillaries 34, 36 produce the same sound as indicated by the
arrows. The transducer 16 is fixed to the capillary 34 in the same manner as in FIG. The
transducer 16 may be attached to each of the two capillaries 34, 36, and a single capillary or two
or more capillaries may be used.
[0017]
A frame 30 of the vibrating body 14 shown in FIGS. 2 to 4 is fixed to a shaft 12 a operatively
connected to the motor 12. Thus, the vibrating body 14 and the transducer 16 are rotatable
about the axis of the shaft 12a in FIG. The rotation of the motor 12 (rotation of the vibrating
body 14 and the transducer 16) is controlled by the control means 20. The control means 20 can
receive signals from the reproduction signal generating means 18 and other sensors and control
the motor 12 accordingly.
[0018]
The vibrator 14 as shown in FIGS. 2 to 4 can be made quite thin and / or lightweight and the
assembly consisting of the vibrator 14 and the transducer 16 can be rotated simply and stably.
Furthermore, the vibrator 14 shown in FIG. 2 to FIG. 4 generates a sound by the division
vibration and the sound radiates in multiple directions, so the directivity is weak. When rotating
the weak directional vibrator 14, even if a listener at a certain position listens to the sound
emitted from the speaker 11, the change in auditory quality is small. Therefore, when such a
03-05-2019
5
speaker device 10 is installed at a place where many people gather, and the speaker 11 is
rotated, many people can hear the sound emitted from the speaker 11, and the speaker 11
rotates. Can provide unexpected visual effects. In addition, similar effects can be expected by
using nondirectional speakers.
[0019]
In order to further increase the visual effect of the speaker 11, it is preferable to irradiate
illumination to the speaker 11 or to decorate the vibrating body 14 of the speaker 11. When the
speaker 11 is illuminated, the signal of the illumination device can be sent to the control means
20, and the rotation can be changed synchronously with the illumination. Alternatively, the
housing (enclosure) of the speaker is formed of a transparent member, or the housing of the
speaker is formed to reflect the light to be irradiated.
[0020]
Moreover, the speaker 11 can use a thing with strong directivity unlike what was mentioned
above. For example, parametric speakers are highly directional. When the directivity of the
speaker 11 is strong, the speaker 11 is rotated, and when the listener at a certain position hears
the sound radiated from the speaker 11, the quality change in the sense of hearing is large. Thus,
in this case, auditory and visual effects can be provided.
[0021]
FIG. 5 is a diagram showing the structure of the reproduction signal generating means 18. As
shown in FIG. The reproduction signal generating means 18 comprises a modulator 42 for
receiving the electric signal of the sound source 40, an infrared transmitter 44, an infrared
receiver 46, a demodulator 48, and an amplifier 50. The modulator 42 and the infrared
transmitter 44 are disposed in the fixed unit 52, and the infrared receiver 46, the demodulator
48, and the amplifier 50 are disposed in the rotating unit 54 together with the transducer 16 and
the vibrator 14. The infrared transmitter 44 and the infrared receiver 46 are not connected by
electric wires, and transmit signals in a noncontact manner (contactless signal transmission
means). Therefore, even if the vibrating body of the speaker device is rotated, a part of the signal
generating means of the speaker device is not rotated but is stationary, and only the remaining
portion is rotated. At this time, signal transmission can be performed without twisting of the
03-05-2019
6
electric wire. In addition, the rotating portion of the speaker device can be formed lighter.
[0022]
In the embodiment of FIG. 1, the control means 20 causes the motor 12 to rotate substantially
continuously. In the embodiment shown below, the control means 20 rotates the motor 12 to
direct it to a predetermined angle as required. FIG. 6 shows a second embodiment of the present
invention, in which the speaker device 10 includes two speakers 11R and 11L, and the speakers
11R and 11L are rotated by the respective motors 12. In this embodiment, an angle sensor 54 is
provided in connection with the shaft 12a operatively connected to the motor 12, and a listener
position detector 56 is provided. The listener position detector 56 detects the position of the
listener P, and the control means 20 changes the angles of the two speakers 11R and 11L
according to the position of the listener P based on the output of the listener position detector
56. The listener position detector 56 can use an infrared sensor.
[0023]
FIG. 7 is a diagram for explaining a listener position detector 56 used by three microphones
MICa, MICb, and MICc. The correlation coefficients rab (k), rbc (k) and rca (k) of the following
equations (1), (2) and (3) are determined from the signals received by these microphones.
[0024]
Here, k is determined by the distance d between the microphones and the sampling frequency Fs
and the speed of sound v as shown in the following equation (4) in the range where the
correlation coefficient is determined. N is the number of samples for which the cross correlation
function value is to be obtained, and it is assumed that N >> k. Note that k is rounded off after the
decimal point. a (bar), b (bar) and (c (bar) indicate the average values of the signals a, b and c,
respectively. .sigma.a, .sigma.b and .sigma.c indicate the standard deviations shown by the
following formulas (5), (6) and (7).
[0025]
03-05-2019
7
The position of the speaker (listener P) is determined from the value of k which maximizes the
correlation coefficients of the equations (1), (2) and (3). FIG. 8 shows a third embodiment of the
present invention. The speaker device 10 includes two speakers 11R and 11L, and the speakers
11R and 11L are rotated by their respective motors 12. In this embodiment, an angle sensor 54
is provided in association with the shaft 12a operatively coupled to the motor 12, and an
acoustic characteristic estimator 58 is provided. The acoustic characteristic estimation device 58
includes the microphone 60, and detects the acoustic characteristic of the room by measuring
the response of the impulse output from the speakers 11R and 11L by the microphone 60
disposed at the position of the listener P. The control means 20 changes the angles of the two
speakers 11R and 11L according to the acoustic characteristic of the room based on the output
of the acoustic characteristic estimation device 60. Although the space in which the speakers are
installed is a room in this embodiment, the space in which the speakers are installed, such as a
vehicle, is not particularly limited.
[0026]
FIG. 9 shows a fourth embodiment of the present invention, in which the speaker device 10
includes two speakers 11R and 11L, and the speakers 11R and 11L are rotated by their
respective motors 12. In this embodiment, an angle sensor 54 is provided in connection with the
shaft 12a operatively connected to the motor 12, and a listener position detector 56 is provided.
The listener position detector 56 detects the position of the listener P, and the control means 20
changes the angles of the two speakers 11R and 11L according to the position of the listener P
based on the output of the listener position detector 56.
[0027]
Furthermore, as the angle is changed, the number of delayed samples of the output signal is
changed. The delay calculator 62 calculates the number of delay samples of the output signal
based on the output of the listener position detector 56. The delay units 64 and 66 disposed in
the path from the reproduction signal generating means 18 to the transducers 16 of the speakers
11R and 11L output a signal including the number of delay samples calculated by the delay
calculator 62 to the transducers 16 of the speakers 11R and 11L. Do. In stereo reproduction,
when the listener gets too close to one of the speakers 11R and 11L, the sound image is pulled
by the listener. Therefore, for example, in the reproduction of a movie, the problem of the
mismatch between the position of the image and the sound image occurs. This embodiment is for
correcting the sound image position in such a situation from S1 to S2.
03-05-2019
8
[0028]
FIG. 10 shows a fifth embodiment of the present invention. The speaker device 10 includes a
speaker 11, a motor 12, and an angle sensor 54. In this embodiment, the speaker 11 is rotated to
present specific auditory information in a specific direction. For example, the speaker device 10
is disposed in an exhibition hall with exhibits Q1, Q2 and Q3, and the loudspeakers 11 are
directed to the exhibits Q1, Q2 and Q3, respectively. The explanation file 1, the explanation file 2
and the explanation file 3 are prepared for the exhibits Q1, Q2 and Q3, and the reproduction
signal generating means 18 selects the explanation file concerning the exhibits Q1, Q2 and Q3 to
which the speaker 11 is directed, The speaker 11 generates the information as a sound. The
audience can see the exhibits Q1, Q2, Q3 near their respective exhibits Q1, Q2, Q3 and hear
explanations. The above-described technique for detecting the position of the listener may be
applied to rotate the speaker in the direction in which the listener is detected.
[0029]
FIG. 11 shows a sixth embodiment of the present invention, in which the speaker device 10
includes the speaker 11, the motor 12 and the angle sensor 54, and as in the case of FIG. It is
rotated to present the above information. That is, the speaker 11 is directed to one of the exhibits
Q1, Q2 and Q3 and generates, as a sound, the information of the explanation file concerning the
exhibits Q1, Q2 and Q3 to which the speaker 11 is directed.
[0030]
Furthermore, while presenting specific auditory information in a specific direction, visual
information using the speaker 11 as a display medium is also presented in a specific direction.
Alternatively, the decoration of the speaker 11 is changed. That is, the speaker 11 includes the
display 68, or the display 68 is attached to the speaker 11. A video file 1, a video file 2 and a
video file 3 are provided corresponding to the sound explanation file 1, the explanation file 2 and
the explanation file 3, and the display 68 can display these video files. The display 68 is formed
of, for example, a liquid crystal display panel, is disposed so as to overlap with the vibrating body
14 of the speaker 11, and rotates together with the speaker 11. Similarly, the speaker and
display may be rotated in the direction in which the listener was detected.
03-05-2019
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[0031]
FIG. 12 shows a seventh embodiment of the present invention. The speaker device 10 includes a
speaker 11, a motor 12, and an angle sensor 54. In this embodiment, as in FIG. 10, the speaker
11 is rotated to present specific auditory information in a specific direction. For example, the
speaker 11 points to the objects Q1, Q2 and Q3 and the speaker 11 generates the information of
the explanation file 1, the explanation file 2 and the explanation file 3 as a sound. The audience
can see the exhibits Q1, Q2, Q3 near their respective exhibits Q1, Q2, Q3 and hear explanations.
The orientation of the speaker 11 is controlled using the selector 70, by the choice of the
organizer or by the choice of the listener.
[0032]
FIG. 13 shows an eighth embodiment of the present invention, in which the speaker device 10
includes two speakers 11R and 11L, and the speakers 11R and 11L are rotated by the respective
motors 12. In this embodiment, the speakers 11R and 11L are flat type speakers shown in FIGS.
2 and 3 and are continuously rotated. The reproduction signal generating means uses music such
as an electronic musical instrument as a sound source. Flat type speakers are weak in directivity,
but the spread of sound changes depending on the angle. Therefore, the sense of spreading of
the sound can be changed by rotating the speakers 11R and 11L.
[0033]
FIG. 14 shows a ninth embodiment of the present invention, in which the speaker device 10
includes two speakers 11R and 11L, and the speakers 11R and 11L are rotated by their
respective motors 12. In this embodiment, the speakers 11R and 11L are flat type speakers as
shown in FIG. 13, and are continuously rotated, and a display 68 is attached to the speakers 11R
and 11L as shown in FIG. Therefore, by rotating the speakers 11R and 11L, it is possible to
change the sense of spread of sound, and by using the speakers 11R and 11L as a display
medium by the display 68, to change visual information or to change the speakers 11R and 11L
Can be decorated.
[0034]
03-05-2019
10
FIG. 15 shows a tenth embodiment of the present invention. The speaker device 10 includes two
speakers 11R and 11L, and the speakers 11R and 11L are rotated by their respective motors 12.
In this embodiment, the speakers 11R and 11L are continuously rotated, and the display 68 is
attached to the speakers 11R and 11L. Therefore, by rotating the speakers 11R and 11L, it is
possible to change the sense of spread of sound, and by using the speakers 11R and 11L as a
display medium by the display 68, to change visual information or to change the speakers 11R
and 11L. Can be decorated. The directions of the speakers 11R and 11L can be selected by the
selector 70.
[0035]
As described above, according to the present invention, the speaker can be moved to provide
visual effects and auditory changes.
[0036]
Brief description of the drawings
[0037]
1 is a diagram showing a first embodiment of the present invention.
[0038]
2 is a diagram showing an example of a vibrator and a transducer.
[0039]
3 is a plan view of the vibrator of FIG.
[0040]
4 is a diagram showing another example of the vibrating body.
[0041]
5 is a diagram showing an example of a reproduction signal generating means.
[0042]
6 is a diagram showing a second embodiment of the present invention.
03-05-2019
11
[0043]
<Figure 7> It is the figure which explains the constitution of the listener position detector.
[0044]
8 is a diagram showing a third embodiment of the present invention.
[0045]
9 is a diagram showing a fourth embodiment of the present invention.
[0046]
10 is a diagram showing a fifth embodiment of the present invention.
[0047]
11 is a diagram showing a sixth embodiment of the present invention.
[0048]
12 is a diagram showing a seventh embodiment of the present invention.
[0049]
13 is a diagram showing an eighth embodiment of the present invention.
[0050]
14 is a diagram showing a ninth embodiment of the present invention.
[0051]
15 is a diagram showing a tenth embodiment of the present invention.
[0052]
Explanation of sign
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12
[0053]
DESCRIPTION OF SYMBOLS 10 ... Speaker apparatus 12 ... Motor 12a ... Shaft 14 ... Vibrator 16 ...
Transducer 18 ... Reproduction signal generation means 20 ... Control means
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