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JPS52123601

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DESCRIPTION JPS52123601
1 ? Name of invention
Head 7 on device
3. Detailed Description of the Invention The present invention relates to a device for controlling a
head 7 on human power signal), and more particularly to a device for controlling left and right
input signals of the head 7 on according to the movement of a listener's head. When listening to
the sounds of nature directly with your ears, the sound pressure arriving at each ear changes as
you turn your head. It is said that this change in sound pressure is one of the means to know the
position of the sound image, t, in particular the positional relationship between front and back.
However, in @ -picking with the head 7 on, even if the head is moved, the sound image change is
licked, so that front and back recognition can not be performed, and the position of the sound
image becomes uncertain. This gives a very unnatural feeling, which is one of the reasons why
the head 7 on-listening is not popularized. A head 7 on device capable of confirming the position
of the sound image in front and back according to such head movement has not been put into
practical use yet. However, for the purpose of experiment, for example, means for transmitting
EndPage: 1 movement of d head to the potentiometer through the piston and the gear and for
making the head-on input 711 J at its output is considered. However, this requires a large-scaled
device such as a device for fixing the listener and a device for fixing the piston, gears, etc.
upwards, thus forcing the listener to listen in an unpleasant state. . Therefore, the abovementioned thing has only the value for experiment to the last. The present invention has been
made in consideration of the above circumstances, and by adopting a simple means for
controlling the input signal of the head phone according to the rotation of the listener's head, the
head rotation can be made with a small and simple configuration. It is an object of the present
invention to provide a head-on apparatus that can obtain a sound image according to the above
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and can be heard comfortably. Hereinafter, the details of the present invention will be clarified by
the embodiments shown in the drawings. In FIG. 1, 1 is a screw-on, and a pair of receiver parts
1? and 1b are connected by a wharf connecting piece IC. 2 is a signal generator element or
signal source that converts a stereo device or other sound source into an acoustic all-electric
signal emitted by a sound source, and supplies the output signal to each receiver sla 1??K of
the feedback unit 1 . A clear path 3a connecting between the signal source 2 and the left and
right receiver units 1? and 16 of the headphone. Variable delay circuits 4a and 4b as signal
transmission circuits are respectively inserted in 3b. The variable delay circuits 4? and 4b are,
for example, a 'low-pressure control type variable delay circuit, and the output of the differential
amplifier 5 is given to each control end. The frusto-conical direction detector 6 comprises a base
1 bent at a right angle to an L-shape, and a pair of light receiving elements 12.13 fixed to the
front face of the base 11, ie, two outer 11111 I faces 11? and 11b. ing.
In other words, the light receiving elements 12.13 are provided on two thousand planes which
are corrected so that equal output can be obtained when the light receiving elements 12.13 are
? ? indicated by arrows in FIG. There is. Thus, the output terminals of the pair of light receiving
elements 12.13 are connected to the ? input terminals of the differential amplifier 5,
respectively. When the head 7 is mounted on the head of the listener, the surface of the base 1
on which the light receiving element 12.13 is fixed is the same as the front face of the listener.
For example, the lower end portion of the base body 1 is fixed to the upper edge of the
connecting head 1c of the head 7 on head. Parallel rays are obtained, for example, by a suitable
light source placed near the # source. In addition, it is not necessary to use a special lighting
fixture as this light source, and it is practically sufficient even for indoor lighting. Next, the
operation of the apparatus configured as described above will be described. When the signal # 2
is activated, the output signal from the signal source 2 is input to the left and right receiver units
1? and ib of the head 7 on via the pair of variable delay circuits 4?r4hf, and is converted into a
predetermined sound to be a listener. Reach my ears. At this time, assuming that the listener's
face is correctly directed to the 1f source direction, the light amount of the parallel light incident
on the detector 12.13 is equal, so the output of the differential amplifier IM 45 is zero. It is.
Therefore, variable delay circuit 40. , 414 have the same delay time set in advance, and signals
having no time difference are input to the receivers 1? and 1h, so that sounds generated
simultaneously on the left and right can be heard. Therefore, the overhead image at this time
exists in front of the listener. By the way, assuming that the listener rotates the head so as to
exhibit an inclination of e with respect to a parallel ray as shown in FIG. 2, the first-come-firstserved incident light to the pair of light receiving elements 12.13 is different. Therefore, the
output of each element 12.13 is as follows. That is, the output of one of the fluorescent elements
12 is 0.707 (bin 6-duty ?), and the output of the other light receiving element J 3 is 0.707 (oos
4 + me). Therefore, the output V of the differential amplifier 5 is the difference between the two,
ie, V = 1.414tiinQ. Therefore, the output of the differential amplifier 5 corresponds to the
variation ?W of the distance W from the sound source S to the left and right ears as shown in
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FIG. Assuming that the distance between the sound 'ms and the rotation center 0 of the head is
W and the distance between both ears is D as shown in FIG. 3, the head rotation angle O is 45 ░
or less. When the distance between the sound source S and the ear is ?W +-!
It is assumed that 3 changes by 2-8 lI 110 (where the above equation is W> D). Therefore, the
distance 111iWR between the right ear and the sound source S is wB = w = ?W, and the
distance between the left ear and the sound source S is WL two W??W. Thus, it becomes
?wccv, and a change in the distance between the listener's ear and the sound source S is
obtained from the differential amplifier output V. By rotating the eyelid, if the distance between
the ear and the eyelid source S changes as described above, the sound pressure and the arrival
time of the sound will naturally change to the lift table on which the head 7 is not mounted. The
sound pressure P is P ? ?, considering that the diffractive effect of the head is omitted. If the
sound pressure P changes by ?P as the distance gw changes by ?W, then the sound pressure P
+ ?P at that time is obtained. ??????????? Therefore, ?P is proportional to the
differential amplifier output V (V??W). The father, the arrival time t is proportional to the
speed of the differential 4-band amplifier V (Vcc.DELTA.W), where X is the speed of sound. As
described above, the output V of the peristaltic amplifier 5 includes the sound pressure
difference and the arrival time difference according to the change in the distance between the
sound source S and the left and right ears. Therefore, when a predetermined one-pressure signal
corresponding to the output V of the differential amplifier 5 is applied to the pair of variable
delay circuits 4a and 4b, the town delay circuits 4? and 4b respond to the sound pressure
difference and the arrival time difference. The amount of delay is changed. As means for
obtaining a predetermined 'voltage signal according to the differential amplifier output V
supplied to the OTt delay circuits 4? and 4b, an arithmetic circuit is provided at the output end
of the differential amplifier 5, and the sound pressure difference and the arrival time difference It
is also possible to calculate two outputs according to the operation to control the delay circuit
4?, 46 by this operation, or the differential amplifier 5 itself has the variable delay circuit 4?,
4b. Even if it is provided with a function, the signal from the signal source 2 passing through the
variable delay circuits 4? and 4A whose delay amount has been changed is set to 0, and given
predetermined delay times, respectively. , Input to b. Therefore, from the respective receivers
ml11 and 7A, a spine amount including a predetermined sound pressure difference and a change
corresponding to the arrival time difference is generated, which is transmitted to the left and
right ears. As a result, when the head is turned, it has an effect as if the sound image is fixed at a
fixed point in space, and can be heard in a natural sense. In the ninth embodiment described
above, the variable delay circuits 4? and 4k are controlled by the control signal according to
both the pressure difference and the arrival time. However, one of the factors is controlled. But it
is effective enough.
Moreover, you may use a degree @ difference as another factor. That is, based on the fact that
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the auditory sense of INWA is sensitive to the phase for voices of lKH2 or less, a phase difference
may be obtained from the differential amplifier output to perform multiple control. Although the
variable delay circuit is used as the signal transfer circuit in the above embodiment, a variable
impedance circuit may be inserted in addition to this, and the signal level may be changed
simultaneously. Furthermore, the detector 6 may be configured such that another detector in
which a pair of light receiving elements are disposed up and down are arranged side by side to
control a signal also for changes in the upper and lower views of the head. As described above,
the present invention converts a sound emitted by a sound source into an electrical signal and
outputs the same, and a pair of receivers receiving the output from the signal generator receives
a predetermined sound from the listener's ear Between the receiver and the signal generator of
each of the receivers EndPage: and the headphones for transmitting the headphones, which are
provided so as to give a predetermined delay time to the signals inputted to the respective
receiver units. The signal transmission circuit is controlled in accordance with the movement of
the head of the listener to fix the sound images obtained from the pair of receiver sections at
fixed points in space. In particular, the above means comprises a light source capable of
irradiating parallel rays, a pair of light receiving elements respectively provided at 4 ░ on two
orthogonal planes so as to obtain equal output when facing the light source, and these light
receiving elements And a means for controlling the transfer characteristic of the signal transfer
circuit by 0 T in accordance with the output of the differential amplifier. Therefore, according to
the present invention, when the listener moves the head, the sound transmitted to the left and
right ears changes in accordance with the movement, and the sense that the sound image is fixed
at a fixed point in space is transmitted. In other words, if you move your head, the # image will
move along with it, so you can give the listener the feeling of listening directly to natural sounds
with your ears. Moreover, in the present invention, only a simple control system consisting of a
pair of light receiving elements, a differential 4-width device, a variable delay circuit, etc. is
required, so the structure is simple and compact. For this reason, there is no fear that the listener
feels disgusted with her husband. As described above, according to the present invention, it is
possible to provide a head 2 on device having an exceptional effect which has not been achieved
in the prior art.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the configuration of an
embodiment of the present invention, and FIGS. 2 and 3 are operation explanatory diagrams of
the embodiment. 1 и и и Head ? ? Ib ? ?, Ib и и и и Receiver unit C и и и connection piece for several
heads и и и signal source (signal generator) 4?, 4h и и и variable delay circuit (signal transfer circuit)
5 и и и difference Dynamic amplifier 6 иии Detector 1 иии Base и 12.13 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и light
detector ????? I Patent Office Secretary Katayama Ishibe ? ?, display of the case Showa
Showa Specially Emulated Face 40608 2 и Title of the invention 2 и Name of the invention Head 2
on device 3 Related patent applicant C3 crt> Tokyo Shibaura Electric Co., Ltd. 4, agent address
Minato-ku Shiba Nishikubo 2 2 Sakuragawacho, Minato-ku Tokyo 17 Mori Building ? 105
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Telephone 03 (502) 3181 (Large Representative) Name (5847) Attorney Takehiko Suzue
Spontaneous correction EndPage: ?
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5
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