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Loudspeaker according to the invention The loudspeaker according to the invention is
characterized in that it comprises the means for adjusting the speech characteristics of the voice
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to loudspeakers and
in particular to loudspeakers which enable high fidelity sound reproduction regardless of the
position of the listener relative to the loudspeaker or the position of the listener in front of the
stereo loudspeaker. The conventional loudspeakers are capable of nearly perfect sound image
localization and stereo reproduction only when the listener's e is specified. FIG. 1 shows the
loudspeaker system according to the invention when it is possible to obtain a device capable of
faithful sound reproduction without substantially compromising such optimum conditions even if
the position of the listener moves or is not suitable. One embodiment of the present invention is
shown in principle. It is apparent that the speakers 1 and 2 and the speakers 3 and 4 listen to the
position 5 of the stereo signal 7 when they are heard in a nearly complete situation but become
incomplete when displaced as 7 '. In the present invention, along with the change of the position
10 of the listener, the output of the speaker and the delay of the drive input, if necessary, etc. are
made to be almost completely stereophonically listenable regardless of the position. In principle,
the change in the position of the listener is detected, and the amplitude and the delay of each
speaker input are made to be 15 corresponding to this. 13.14 shows such a control route M in
full. FIG. 2 shows an example of an apparatus for realizing the principle system as shown in FIG.
1. 15.16 is a variable delay apparatus, which can be easily realized by a commercially available
BBD or CCD type apparatus. 20EndPage: 1 Therefore, by the variable control anz 5.6 and 15.16,
it is possible to change the output of each speaker, that is, the stereo balance, the frequency
characteristic, the delay, etc., if necessary. When the listener 7 is displaced to the position 7 ', the
sensors 20 and 21 generate AC and BC outputs respectively for the outputs A and B of the Senna
20921 and the outputs C of the central sensor by the circuit wind, and the control circuit For
example, in the position of 7 ', the output of the speaker 2 is enhanced and the output of the
power 1 is reduced, and at the same time the input delay of the speaker 2 is reduced to reduce
that of the speaker 1 Control to increase. Only one of the natural speaker inputs may be
controlled. Of course, the% output may be adapted to the needle correction of the auditory
correction using other calculation methods. The control can also be performed on the frequency
characteristics, and in general, it is possible to compensate for the attenuation of the treble when
it is offset from immediately before the speaker. Fig. 3 shows an example of the sensor of Fig. 2,
in which a conductor M20.20 'is provided under a carpet 50 with an insulating thin film 4
sandwiched between them. The capacitance between the electrodes is increased by
multiplication, and the capacitance transformation produces the outputs AsB and C of FIG. 2
simply by using an alternating current source and a load resistance.
When a carbon film or the like is used for n, the sensor output can be easily detected as a change
in resistance. The shape of the sensors 20.21 and 23 may be arbitrary 5 and 23ii may be
omitted, or an additional number may be arranged in an arc or the like, and the circuit 240
function may be weighted according to this. You can also. It's easy to set / s self! It may be a
switch of the IIb door. Other Piezoelectric charge film PVDF * Piezoresistor thin film, Eleventh
degree, Octet-7th degree electrode film, etc. Any pressure sensitive element is used. As shown in
Fig. 3. Control signal is as shown in 3-C + AC. When the person is at all of 77'7 ', it is convenient
because no control signal is output. This point is also advantageous 15 because the control signal
with the heavier load increases. That is, it is also possible to control the status effect effect to be
effective for a large number of listeners. Figure 3 (bXc) is another example of the shape of the
sensor under the carpet, when the senna material is arranged as a similar thin film like 90r9ir92
... in (b), its output is% 2420 times 3 (c) which can be processed to optimize the signal to each
speaker, the sensors 100, 101 + 102 и and 110, 111, 112 и и и are arranged in a matrix, and the
distance from the speakers is more precise In accordance with the angle, it is possible to perform
the optimum l-force control with respect to the listening position and the number of people @
castles. Of course, in the case of (b) in the figure, the sensor element may be used, and in the case
of FIG. It is easy to make it calculate at 24 so as to make the optimum side according to the
hearing consideration 1iJ + Ml by such a sensor. Nest 4 is another example of the present
invention, in which the listener is detected by a radar placed in the vicinity of the speaker to
detect the position away from the door or a part thereof, and issues an appropriate control
signal. Of course, if only both distances are fixed, the direction is sufficient, so that information
such as position distance can be generated in the process circuit. As a result, the speaker output
can not only be controlled according to the distance of the listener, but also the above-mentioned
stereo perfection can be achieved. Also, the position of the listener can be determined by emitting
a small scale L27 type L-2 wave. If complete, it may be issued. It is obvious that the concept of
automatically and dynamically controlling the volume according to the distance as described
above can be applied to a single speaker system. Alternatively, a method using a sensor as shown
in FIG. 3 (b) (C) provided separately may be used. In FIG. 4, reference numerals 30 and 32 denote
radar pulse emitting antennas 3t + 33 placed in the vicinity of the speaker.
A pulse generator 52 is a microwave pulse source by gun diodes, or a driving pulse source, in
this case 30, 32 are LEDs or lasers, and 31.33 are light receiving photoelectric conversion
elements. Alternatively, ultrasonic pulses may be used. The processing circuit 53 can easily
measure the distance from each speaker up to 7 'by 15 and include a circuit for calculating the
position of 7' from the two quantities, and it is easy to use the control signal generated from FIG.
Control circuit such as -16! R can do it. In addition, the distance information can of course be
subjected to volume control and the louder speaker can be made larger as the user listens at a
longer distance. When using 20EndPage: 2 radar, if there are a large number of listeners, it is
possible to make the reflection (the multiplicity of the pulses not be controlled. Also, as with the
upper case, it is possible to perform a majority operation such that the speaker operates properly
to a large number of listeners. It is obvious that the radar can also use ultrasound and others. The
radar radio waves of the two speakers as described above can be easily separated if the
frequency is changed. Fig. 5 shows a case where the listener puts a simple oscillator or light
source 6 ░ on the body of the radar, and the receiver 61. 62 on the speaker side receives the
output and outputs the control signal. The magnitudes of the outputs may be compared between
circuits to produce a control signal, but a central receiver 65 may be provided, the output also
added, and it may be nearly complete if computed at 64, 6 may be a pulse or a continuous wave.
Also, the infrared radiation of the human body may be used instead of the transmitter 6o, and the
infrared detector 61 ░ 62 may use the output 65 if necessary. FIG. 6 (a) shows another
embodiment of the present invention In the example of the gun, 72.73 is a light source such as a
light source, a light source such as ?V, a buccal gland and the like, and a light receiving element
70.71 is provided in front. Output A of 70171. For example, control signals A-B and B-A are
generated from circuit B by circuit 74 to control various characteristics to the speakers 1 and 2,
respectively. If a filter 91 ░ 92 is provided in front of 70.71, the separation operation is easy. Of
course, the same applies even if the light source and the light receiver are exchanged. If I0 is
used to modulate 72.73 with another no-J wave number and receive a received LDF filter, or
another pulse modulates 72.73), I can use 7 lines of light. 6 (b) is a modification of FIG. 6 (a), the
wall 95 is provided with reflecting mirrors 93 + 94, and the light receiving elements 91 and 92
are placed on the speaker side. Yet another source% and reflector 97.
A light receiving element 98 may be used. The light receiving element and the reflecting mirror
may of course be attached to a space, for example, to a lighting device or a pillar. 9L94 may be
used as a reflector attached to the listener. It is also possible to sense using just the reflected
light of the listener. In this case, it is difficult to separate the right and left sides by 2 ░, so it is
sufficient to apply known multiplex technology such as modulating and separating the light of
the light sources 72 and 73 at different frequencies or using time division double pulse. 7- shows
a case where the light source is provided at the upper side and the light receiving element is
provided on the floor and the same processing as in FIG. 6 etc. is performed. Of course, the floor
and the ceiling may be interchanged. FIG. 8 shows an embodiment according to the present
invention for preventing the deterioration of the frequency characteristic due to the change of
the if of the listener of the early speaker. 42 is a bass cone, and 43 is a high-tone speaker which
is coaxial. When the listener 7 is in the position 7 ', the control signal 45 is generated by means
such as the above-described example, and the circuit 41 enhances the high-pitched part of the
signal 40 or reduces the low-pitched part. The 70 position detection may use any of the sensors
of the above embodiments, but it is convenient to use light for 4f-. Of course, the present
invention can be applied to a single cone speaker, and the speaker input frequency characteristic
is adjusted according to the position of the listener. FIG. 5 shows the case of the separated twoway speaker system, which is obtained from the coil 7y48 +) 47 and the box 85, and the toator
47 is often retreated to the rear above the box for sound image localization. The present
invention does not require the use of delay 51 to shift the position of 47 in this manner. Also,
when the listener changes height and goes from 7 to 7 ', the vertical displacement of 7 is
detected by the above method, and when 1 for example 75 is shifted upward like 7', the delay is
reduced and always good. It can maintain the orientation. Of course, at the same time, it is
possible to achieve the change of the frequency custom order accompanying the change of the
listening angle by the two speakers or one input Nme 4 j as in the case of the above example. The
detection of the listener's lO up and down displacement as shown in Fig. 9 can be easily
performed by, for example, a combination of light emitting and receiving elements as shown in
Fig. J6. FIG. 10 is an embodiment thereof. 80 and 82 are light emitting elements, for example,
81.83 are light receiving diodes, and the outputs A and B are circuits 74 and 74 respectively for
controlling the input of the speaker 47.4815. Brake the delayed stop of the car. Of course, the
number and position of the senna may be changed arbitrarily. According to the present
invention, in general, in the case of comprehensively listening to sound outputs of different
characteristics, the listener can automatically adjust to the optimum state even when changing
20EndPage: 3 such as the position or the height and the number of persons.
A detection means for the state, and a device for adjusting the frequency characteristic of the
loudspeaker input 9 according to the output signal of the detection means, the delay and its
pond, the control means using any other known means described above Can. In the previous
example, the ?2? control means has an amplitude 2 frequency characteristic. Although the case
of controlling the delay and the like has been shown, the speaker position angle and the like may
be controlled mechanically by similar control signals. FIG. 11 shows an example thereof and
conceptually shows the case where the angle, location and the like of the speakers 1 and 2 are
used together with the input signal amplitude control and the like according to the position 7 'of
the listener. The movement of equipment pivots a servomotor or the like with the above-
mentioned listening position sense signal to control the speaker to be always directed to the
listener. This too is easy to use an optical sensor or the like. In such a case, frequency
characteristic control is not necessary. Further, if horizontal movement is performed in addition
to the rotation of the speaker, delay control becomes unnecessary. FIG. 12 shows the case of
controlling the inclination of the upper and lower sides of the speaker as the same mechanical
control. Although we have mainly described your control, it is often convenient to control the
automatic volume control only in response to the distance between the speaker and the listener
and the angle as mentioned above. For example, when housewives at home and close to a TV or
radio close up the volume and raise the volume automatically, noise pollution due to unnecessary
volume also decreases. This can be implemented by controlling the speaker input by the signal of
the listener position sensor as described above. FIG. 13 shows the embodiment in which the light
from the light source 72 is received by the light receiving element 83181 or the like, and the
volume is also lowered if it is reduced to the extent of the presence of the listener. The light
source and the light receiving element may be replaced, and the senior output is likely to change
depending on the distance from the listener's speaker. Also, a sensor provided at the bottom of a
carpet or the like as shown in FIG. 2 can be used easily and easily. In addition, using the
mechanism as shown in M11, it is possible to control the rotation of the rotating stand of the TV
receiver itself. For example, the U-turn base is rotated by a servomotor etc with sensor output as
described in Fig. 2 and others. It is also easy to control so as to turn to the viewer Q direction.
Since it is also possible to automatically adjust ? ? according to the distance as described
above, the same sensor can be used to perform various functions. Stereo effect self-excited
according to the present invention: l'M6 device 1 is designed so that the appropriate effect will
be given to the fixed movement of the listener depending on the size of the demonstration hall by
the selection of the turn-on constant can do. In other words, for example, when the listener
moves 2 m in the 8 tatami 11 ?, the same realistic effect can be given as in the case of the same
distance in the 100 tatami demonstration hall.
It is obvious that this can be obtained, for example, by adjusting the opening 1 such as the
volume and delay due to the control link in FIG. Direction T (! J. HBI described above J) Variable
delay, etc., can produce a wide range of delay variation by the frequency ? statement of clock
pulse, and vCO pulse generator is also marketed as IC and can be easily combined with l [c 13BD.
According to the present-A1 man, it is clear that the proper stereo effect can be produced
regardless of the limited speaker position to obtain the stop U depending on the condition of the
1st bedroom. For example, even in the case where one of the speakers is in the horizontal
orientation or in the vertical position, control can be performed so that proper listening can be
performed. By appropriately combining the above-described embodiments of the present
invention, the control of each speaker most appropriate in the fluctuation of the listener's vertical
position, left and right, front and rear positions is performed, thereby enhancing the
completeness of HIFI stereo reproduction. It is obvious to contribute. As in the case of car
stereos, it is better to change the balance according to the position of the seat used, especially
according to the principle of 10 ?? 1 which is different in the riding situation. I wish I had a
child. Of course, in this case, a sensor such as an on / off switch may be used for simplicity. The
present invention can also be applied to a multi stereo system such as 15 or 4 channel system,
and an optimum signal can be supplied to each speaker depending on the position and number
of listeners. In the present invention, the position 1i sensor is a light or 1 (in the case of using a
wave (a fixed shield or reflector, and in the case of a 2 ░ EndPage: 4 sensor shown in FIGS. Since
this produces an output, it is easy to remove this kind of fixed effect. For example, in the case of a
radar such as that shown in FIG. 2.3 using a simple floor of a fixed reflection canceler, it is easy
to erase predetermined sense information or remove it from the output. Moreover, it is perfect if
it is stored in a minicomputer or the like. For example, in a sensor as shown in FIG. 3 (c), the
senna output of a fixed object placed at a predetermined X + y coordinate is deleted. Needless to
say, the present invention is not limited to the specific example described above, and various
modifications, other combinations of parts of the embodiment, or the like can be made.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows in principle the embodiment of the
loudspeaker system according to the invention. 1.2 и и и stereo speakers, 3, 4 и и и stereo power
supply, 5, 6 и и и processing circuit, 7 и и и listeners, 7 'и 7 displaced place, 13.14 и и и control Route
FIG. 2 shows an embodiment of the present invention. 15.16 и и и Processing circuit, in particular
variable delay circuit, 20, 21 ░ n и и и Position sensor membrane, performance и! J, circuit, FIG. 3
(a) shows an embodiment of the senna of FIG. ? и и и Insulating thin film, 5 G и и и Fig. 3 (b) (C)
shows various forms of s / s. 590, 91.92- =, 100.101.102. 110tIIL 1121... Sensor film FIG. 4
shows another embodiment fIl of the present invention. 30.32 ... wave launcher% 31.33 ... wave
receiver. 52: Pulse source, frame: Processing circuit 1 ░ J5 Fig. 7 shows another embodiment of
the present invention. 60 иии Oscillator to light source s61 * bL65 иииииииииииииииииииииии Fig. 6 (a) (b) shows
another embodiment of the present invention. 72.73.96 ... light source, 7Q 17i $ 98 ... light
receiving element, 74 ... processing circuit, 91.92 ... filter, 95 ... wall 15 surface . FIG. 7 shows a
modification of FIG. FIG. 8 shows another embodiment of the present invention. 40: Signal source
41: Processing circuit 42: Bass speaker ... High-pitched speaker 46: Control H + route 20 FIG. 9
shows another embodiment of the present invention . 47s 48 иии 2 Design speaker% 51 иии Delay,
81 иии Speaker box Fig. 10 shows an embodiment of the present invention. 80.82 иии Light emitting
element, 81.83 и и и Light receiving element Fig. 11 shows another example of the present
invention. FIG. 12 shows still another embodiment of the present invention. FIG. 13 shows
another embodiment of the present invention. 81.83 ... light receiving element. 7 '1st ZEndPage:
5 $ 22 $ 3 eyes 3 Y 25' jl '-5 End Page: 6 6 days ? Y Figure $ 10 Figure (EndPage: ?
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