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FIELD OF THE INVENTION The present invention relates to a pinaural stereophonic sound
system. Background art and its problems In general, since it is possible to determine the sound
image of almost all directions with a sound source consisting of signals of left and right two
channels, a two-channel signal recorded by a pair of left and right microphones provided on a socalled simulated bait If you play at, you should be able to hear almost natural stereo sound.
However, it is known from the experience that human beings are born to judge most of the sound
coming from the front by visual sense, and the sound from the back is better at the position of
the sound source than the sound at the front. Accuracy is high. Therefore, even if the signal
recorded by the artificial bait microphone is listened to with the hessodophone, the sound image
generally moves backward and tends not to be obtained forward. SUMMARY OF THE INVENTION
The present invention avoids the above-mentioned drawbacks and, of course, provides a sense of
stereo, as well as obtaining a natural feeling by also obtaining a forward sense of the sound
image, and further obtains the sound from the left and right Hendphones and the front sound
image. By adjusting the time for the listeners of, the unnaturalness is further eliminated.
SUMMARY OF THE INVENTION According to the present invention, signals obtained by the left
and right microphones attached to a bait are respectively delayed through a pair of left and right
loudspeakers such as hessofons to be placed on both sides of the listener's ear. The speakers to
be supplied independently and to be disposed in front of the pair of speakers such as a
headphone are at least the signals obtained by the left and right microphones of the artificial bait
or the signals obtained by mixing them. Is provided to achieve the above-mentioned object.
EXAMPLE One example will be described below with reference to FIG. (1) is a dummy bait, (1a) is
its front surface, (2a), (2b) is a microphone, and (3a), (3b) is a transmission system of signals
from the microphone. (11) is a tuner, from which the demodulated left and right stereo signals
are obtained. The signals from the tuner (11) and the microphones (2a) and (2b) are selected by
the changeover switches (12a) and (12b) interlocked with each other and supplied to the twochannel tape recorder (5) and recorded. The reproduction signal from the tape recorder (5) and
the signal from the tuner (11) are selected by the changeover switches (13a) and (13b)
interlockingly connected with each other, and the delay circuit (34a) (34b) and the amplifier
(10a) are respectively selected. Through the (10b), it is supplied to the open air type
hesodophone (4a) (4b).
(6) is a listener. The respective left and right signals obtained on the output side of the
changeover switches (13a) and (13b) are mixed in the mixer (8) and supplied to the speaker (7)
through the amplifier (9). This speaker (7) is spaced apart from the listener (6) and disposed in
front of it. Also, tone control can be applied to both the amplifiers (9), (10a) and (10b). Therefore,
the sound collected by the left and right microphones (2a) and (2b) attached to the artificial bait
(1) is an open air type hess dofon (4a) (4b) disposed near the listener (6). Because the listener (6)
listens and also has a speaker (7) in front of the listener (6), it is possible to feel a sense of front
as well as a sense of stereo. FIG. 2 shows another embodiment, and corresponding parts to FIG. 1
are shown with the same reference numerals. In this example, when reproducing with two
speakers (7a) and (7b), the signals of both channels are respectively transmitted through phase
inverters (31a) and (31b) and frequency characteristic addition circuits (32a) and (32b ') to a
mixer (33a). The case is that the left and right sounds are obtained from the speakers (7a) and
(7b) by supplying them to (33b) and mixing them with the signal of the other party's channel.
FIGS. 3 and 4 show still another embodiment, and the corresponding parts to FIG. 1 are given the
same reference numerals and the description thereof will be omitted. In the example of FIG. 3,
the speakers 7a and 7b are simply connected to the signal transmission systems 3a and 3b,
respectively. In the example of FIG. 4, one of them is omitted. . An example of an open air type
hess dphone (4a) (4b) is shown in FIGS. (14) is the main body of Hend phone. This is a wellknown small earphone, that is, one that is held by the ear by itself, and a housing (15) housing
the electro-acoustic transducer and a cylindrical part (16) projecting from the housing (sound
path) It consists of Normally, a relatively soft cylindrical body is fitted on the cylindrical portion
(16), and this cylindrical body is fitted in the ear canal (19) shown in FIG. (20) is a pinna and (21)
is a so-called earlobe. The trumpet body (17) is mounted on the cylindrical portion (16) of the
above-mentioned hesodophone main body (14), and this trumpet body (17) is formed in the
recess of the ear, that is, the recess formed on the lower side of the ear canal Fit inside. In this
case, the casing (15) of the headphone body (14) and the trumpet body (17) may be formed so as
to pinch the projection (23) on the upper part of the earlobe (21), or as the trumpet body (17) It
does not have to be curved, and it may be flat or wedged.
Furthermore, the open air type Hendphones (4a) (4b) are not limited to the above-described
example, and the same is true even if the speakers are arranged near the left and right ears of the
listener (6). As artificial bait (1), what is shown in FIG. 8 can be used. That is, in this example, the
tape recorder housing which can be cassette type is used as the artificial bait, and the artificial
ears (24a) and (24b) are attached to the left and right sides thereof, the artificial external ear
canals (25a) and (25b) are provided to this Microphones (2a) and (2b) are housed inside, and the
signals collected by these microphones (2a) and (2b) are recorded on a tape (26). (7) is a speaker,
(27) is a tuning ladder, (28) is a dial, (29) is a switch switch ladder, and only the head 'phones
(4a) and (4b) are operated, or Whether to simultaneously operate 4a) and (4b) and the speaker
(7) or to operate only the speaker (7) is switched. (30) is a people adjustment ladder, which
allows the volume and sound quality of the hessoid phones (4a) (4b) and the speaker (7) to be
separately adjusted. (3I)ばヘソドフォン(4a)(4b)のジャックである。 According to
the present invention described above, according to the present invention described above, the
pseudo H (a speaker (11) is disposed near the listener (6) with the sound collected by the left and
right microphones (2a) and (2b). In this example, since it listens by open air type Hessodo 7 (4a)
and (4b), of course it has a sense of stereo, but also has a speaker (7) in front of the listener (6)
Therefore, it has the feature that it can sense the sense of stereo as well as the sense of forward
and can avoid the drawbacks of the conventional closed type hesodophone. Further, according to
the present invention, since the delay circuits (34a) and (34b) are respectively inserted in the
transmission system to the hess dofon (4a) and (4b), the Hendphones (4a) and (4b) are
connected to the listener (6). ) And the arrival time of the sound from the front speakers (7) (or
(7a) and (7b)) can be matched, and it has a feature that can further eliminate unnaturalness.
Further, according to the present invention, since it is sufficient to transmit two-channel signals,
the pseudo head side may be the same as a conventional pinaural stereo device, and only on the
listening side, the speaker 7 is provided in front of the listener. Therefore, the entire device is
hardly complicated and easy to handle.
Brief description of the drawings
1 to 4 are connection diagrams showing respective embodiments of the apparatus according to
the present invention, and FIG. 5 is a front view showing a cross section of a part of the use state
of the Hess doff used in the present invention, FIG. FIG. 7 is a perspective view of a head phone
body, FIG. 7 is a perspective view of a trumpet body, and FIG. 8 is a front view of an example of a
pseudo head which can be used in the present invention.
(1) is a pseudo head, (28) and (2b) are left and right my croons, (4a) (4b) are a pair of speakers
such as a pair of left and right headphones, (7) are spaced apart from the listener It is a good
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