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JPS5151901

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DESCRIPTION JPS5151901
(2000 yen) 'patent application (6) name reduction 1) 2 3, patent applicant 4, agent cloud 160
specification ■ Japan Patent Office ■ JP-A-51-51901 ° 0 1 (1976) 5.7 Japanese Patent
Application Publication No. 49- / 2631 + 734623 He is known, the sound from the rear is more
advanced than the name of the stereo sound device in the detailed description of the invention In
general the left and right of the two channels Since it is possible to judge the sound image in
almost all directions with a sound source based on a signal, if a 2-channel signal recorded by a
pair of left and right microphones provided in a so-called pseudotype is reproduced with the
head 7 on, it is almost natural. You should be able to hear good stereo sound. However, the
human being is born, and the sound coming from the other side by the later experience is more
accurate for taking seven sound source positions than that for the one that is almost judged
visually. In addition, even if the head 7 is turned on to listen to the signal recorded by the
pseudo-like microphone in this way, the sound image generally moves backward and tends not to
be obtained forward. The present invention provides a stereophonic audio system which avoids
such drawbacks. The stereophonic audio system according to the invention will now be described
with reference to FIG. (1) is a pseudo-class and (la) shows its front side. In this pseudo class (1),
microphones (2a) and (2b) are attached to the left side and the right side, respectively, and these
signal transmission systems (3a) and (3b) are respectively drawn out, the left side and It is
adapted to be supplied to the right side headphone (4a) and (4b). In the example shown in FIG. 1,
a 2-channel tape recorder (5) is inserted in the signal transmission systems (3'a) and (3b), that is,
recording is performed by the left and right microphones (2a) and (2b). The recorded signal is
recorded on the left and right channels by the tape recorder (5), reproduced and listened to it,
and EndPage: 1 is shown. (6) is a listener. In the present invention, the heads 7 on (4a) and (4b)
are configured as an open air type (open house) so that sounds from the heads 7 on (4a) and (4b)
can be heard simultaneously with the external sound. And providing the signal collected by the
above-mentioned microphone (2a) and / or (2b) or more separately from the listener (6) to, for
example, a speaker (7) disposed in front of it. The In the example shown in FIG. 1, the left and
right channel signals are mixed by the mixer (8) and supplied to the amplifier (9), and the output
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is supplied to the speaker (7). Tone control can be attached to the amplifier (9).
Also, (10a) and (10b) are also amplifiers, and tone control can be attached to them as well. U 頭
Iti FM f una (stereo tuner), selects the output of the pseudo head microphone or tuner Q1 by
switching the switches (128) and (12 b) linked together, and supplies them to the tape recorder
(5) In this case, the switches (13a) and (13b) are switched to be supplied to the switch (4a) and
(4b). Examples of open air type head phones (4a) (4b) are shown in FIGS. (14) is the head of the
7th body. This is usually a well-known small volume on. That is, it is held by the ear by itself, and
consists of a housing αω housing the electro-acoustic transducer and a cylindrical portion aQ
(sound path) projecting from the part. Usually, a relatively soft cylindrical body is fitted on the
cylindrical portion αe, and this cylindrical body is fitted in the external ear canal shown in FIG.
In addition, an end is a pinnacle and (goods) is what is called an earlobe. In this example, the
above-described tubular portion of the earphone body I (a trumpet (17> is mounted on 1e, and
this trumpet .alpha..eta. Is a recessed portion of the ear or a recessed portion formed on the
lower side near the entrance of the ear canal The case where it was made to fit in 24 is shown. In
this case, the projection (3) on the upper portion of the earlobe Q may be formed so as to be
squeezed by the ear 7-year-old 7-body α superior housing a4 and the wrapper body αη. In
addition, it is not necessary to necessarily be curving as the wrapper body α-y, and it may be
flat. Further, the open air type earphones 4a and 4b used in the present invention are not limited
to the above-described example, and the same is true even if the speakers are disposed near the
left and right ears of the listener 6. According to the present invention described above, the
speaker arranged in the vicinity of the listener (6) the sound picked up by the left and right
microphones (2a) and (2b) attached to the pseudo head (1) Of course it has a sense of stereo
because it listens in the open air type headphones (4a and 4b), but it also has a sense of stereo
because it has a speaker (power) also in front of the listener (6) At the same time, it has a feature
that makes it possible to sense forward feeling and avoid the drawbacks of conventional closed
headphones. The pseudo head (11 shown in FIG. 5 can be used. That is, in this example, a tape
recorder housing capable of cassette type is used as a pseudo head, and pseudo ears (24a) and
(24b) are attached to the left and right sides thereof, and pseudo external ear canals (25a) and
(25b) t It shows the case where the microphones (2a) and (2b) are housed inside, and the signals
which are sounded by these microphones (28) and "(2 ° b) · · · are recorded on the tape (i) .
(The force is the speaker shown in Fig. 1, the punishment is the tuning ladder, and the whistle is
the dial. (D) is a switch switch ladder, operates only the heads 7 on (4 m) and (4 b), or
simultaneously operates the headphones (4 a) and (4 b) and the speaker (7) Whether to operate
only the speaker (7) or the like is switched. In the figure), it is possible to adjust the volume and
tone of the headphones 4a and 4b and the speaker 7 separately with the adjustment forceps 69
respectively. The first @ is the jack of the headphone (4a) (4b). In the example of FIG. 1, the
signals of the left and right channels are mixed and listened by one speaker (7), but as shown in
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FIG. 6, the signals of the left and right channels are respectively received by the left and right
speakers (7a). (7b) K can also be listened to, and as shown in FIG. 7, it is possible to listen only to
the signal of one channel with the speaker (7). In FIGS. 6 and 7, corresponding parts in FIG. 1 are
indicated by the same reference numerals. Even in such a configuration, the same effect
“EndPage: 2” as in the case of FIG. 1 is obtained.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a connection diagram showing an example of a
stereophonic sound device according to the present invention, FIG. 2 is a front view showing a
part of the use state of a head phone used in the present invention, and FIG. Fig. 4 is a
perspective view of the head body, Fig. 4 is a perspective view of a trumpet body, Fig. 5 is a front
view showing an example of a pseudo head usable in the present invention, and Figs. 6 and 7 are
other embodiments of the device according to the present invention. It is a connection diagram
showing an example. (1) is a pseudo-head, (2a) and (2b) are left and right microphones, (6) is a
listener, (4a) and (4b) are a pair of left and right to be placed near the listener's ear Speaker, (The
force is the speaker that should be spaced apart from the listener. Patent applicant Sony
Corporation Fig. 5 Procedure amendment May, 1951, Patent application No. 126314 2, the
name of the invention Related to the stereo sound device case Patent applicant 6, invention to
increase by correction Number 8 of correction, correction content EndPage: 31, 1 in the
specification, the second line from the bottom of the page and the second page, the first line to
the second line and the first line are corrected as "forward". 2, the same, page 6 from the bottom
3 lines [Note 6 and 7] [and also as shown in FIG. 8, in the case of reproducing with two speakers
(7a, 7b) The signals of the channels may be synthesized by the adders (3aa) and (aab) through
the phase inverters (318) and (31b) and the frequency characteristic adding circuits (a2a) and
(32b), that is, an acoustic matrix may be configured. In addition, it corrects to "6, 7 and 8". 3,
page 7, line 1 "obtained. Next, “by adding a signal delay circuit to the signal transmission path
to supply the head 7 on (4a) (4b),” the sound from the speakers 17 ((7a) and (7b)) and the head
are added. It is also possible to match the time to reach the ear with respect to the 7-on (4a) and
(4b) sounds. "To join. 4, page 7, line 8 "Figures 6 and 7" are corrected as "Figures 6, 7 and 8". 5
・ Drawing “EndPage more than desk filling in figure 8”: 4
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