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JPS4835304

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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
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DESCRIPTION JPS4835304
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the principle of a stereo
reproduction apparatus for explaining the present invention, FIG. 2 is a system diagram of an
example of the stereo reproduction apparatus of the present invention, and FIG. 3 is a stereo
reproduction to which the present invention is applied. 4 is a perspective view showing the
appearance of the cassette tape recorder with a radio, FIG. 4 is a perspective view showing
another use state of the cassette tape recorder with the radio, and FIGS. 5 and 6 are other than
the cassette tape recorder with a radio respectively It is a perspective view which shows the
principal part of the external appearance of an example. 1L and 1R indicate left and right built-in
speaker systems, 2 indicates a mixing circuit, 9 indicates a cassette tape recorder with a radio as
a reproducing apparatus body, and 5L and 5R indicate left and right external speaker systems.
Fig. 1 翫 = St-沁 R 廟 一 蟻 一 13-実 48-35304 (2) Fig. 2 Fig. 3 Fig. 4 実 実 48-35304 (3) Fig. 24
One 15-
DETAILED DESCRIPTION OF THE INVENTION The present invention is a compact device having
a built-in speaker, which can obtain a large stereo feeling and can also perform 4-channel stereo
reproduction by connecting an external speaker when necessary. I want to get things. In the
conventional stereo reproduction system, the left audio signal 8L and the right audio signal 8
from the stereo signal source are respectively supplied to the left speaker system and the right
speaker system, and the left audio and the right audio are respectively generated from the left
and right speaker systems. It was common to have them In such a stereo reproduction apparatus,
when the distance between the left and right speaker systems is narrowed, stereo feeling is
reduced. Therefore, the left audio signal SL from the stereo signal source and the right audio
signal 8R are supplied to the mixing circuit and the left channel audio signal B @ = SL−rn (where
m is the mixing ratio O <L> 1) and The channel audio signal It * xx1B-11sL is produced, and the
left and right channel audio signal -18 is supplied to the left and right speaker systems,
respectively, for left channel channel seat and right channel audio respectively (2148-asm (□ A
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stereo playback device where the sense of stereo is large despite the relatively narrow distance
between K and the distance between the left and right speaker systems, for example, 20 to 30 K
so as to perform acoustic microphones by making 3 Has been proposed. The principle of such a
stereo reproduction apparatus will now be described with reference to FIG. 8PL and 8PR are left
and right speakers arranged at intervals d, respectively, and P is a listening position of the
listener, for example, on a straight working line between the left and right speakers 8PL and apH.
9. Left channel audio signal 9. Left and right speakers 8PL, HP- respectively. 寓 8 I, -21181 and
the right channel audio signal 9. wxSR- @ 8L is supplied, and left channel audio L-rn'R from left
and right speakers 8PL, 8PFl respectively. Right channel channel voice R-m'L (where m 'is the
voice mixing ratio, O (m (1)) is 4 voices and ゐ). The left and right speakers 8PL from the
listening position P. Assuming that the unit vector in the apB direction (assuming each speaker as
a point sound source) is the center, 麿, left and right speakers 8P1. , The sound pressure vector
at the listening position tPK of the sound wave from BPB is a-I! It becomes llR7, 榔 '-, 3, 48-353
sawtooth 1 Ta1 1 Lb. The left speech sound pressure vectors t, a and −m′Lb are vector-added
to produce the left speech sound pressure vector L (mar! 11 # Ma) is obtained, and the right
audio sound pressure vector) 16 and = m 'fi' are vector added to obtain the right audio sound
pressure vector R (f-weight '7). The left voice and the right voice n can be heard as coming from
the actual left and right speakers 91'l, a direction which spreads to the left and right from the
position of the EIPR.
That is, the spread of the p stereo sound field is expanded by the acoustic matrix of the left and
right channel sounds as described above, and therefore the value of the mixing ratio を is
selected from the appropriate fiK (near IK). The sense of stereo can be enhanced even with
relatively small distances. Incidentally, the principle of this contraband 1 is established for a
sound of one station wave number having a large sound 200 to 400 Is to 2 to 4 KHs, which is
easy to detect the sound SO direction O, that is, a stereo feeling. The granular mixing ratio m% m
'can also have frequency characteristics, and is generally expressed as crystal and column I,
respectively. In the present invention, such a device Km, and further, the connection of the
external sliding (4) 48-35'3Q 4 05-force from the K to the one capable of also performing 4channel stereo reproduction from K It is. BRIEF DESCRIPTION OF THE DRAWINGS The invention
will now be described in detail by way of example with reference to the drawings. This example is
a case where the present invention is applied to a cassette tape recorder with radio (AM, FM).
FIG. 2 is a system diagram of stereo reproduction according to the present invention, in which
(IL) (1 @ is a left and right built-in speaker system, in this case two speakers each with one
speaker) lL), (1B) correspond to the left and right speakers 5PLSPRK in FIG. 1 above. (2) is a
mixing circuit. TL, TJ are left and right audio signal input respectively, 7M → レ オ レ オ Leo
reception Beco code player Magnetic recording / reproducing device etc.] Left and right short
audio signal SL from stereo signal source, SR6 input terminal TL , Q to the temperature control
circuit (2) to supply left and right channel audio signals s, == 8 L-f SR and 8.. = Slll-m8L are
synthesized, respectively through the left missing right channel output amplifier circuit (314),
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(3R) and the right built-in mepica xFs is fed to (IL), (IIO). The 2nd order speaker (IL) and (IR) f ′
′ 4g-3104-061 □ may be a single speaker for each full sound, or alternatively, may be
composed of a plurality of speakers with different assigned sound ranges. . This mixing circuit
12) uses, for example, left and right amplification transistors in an emitter-collector split form to
produce left and right audio signals in the reverse planting phase, and it is possible to mix two
countries with an appropriate mixing ratio (having frequency characteristics It is also possible to
mix it with K, and this mixing ratio can be rented. tL% tR is a left and right audio signal external
output terminal. Left and right audio signal 8L% SB from left and right audio signal input
terminals TL, TR are respectively left and right output amplifier circuits (4L), (4 → The left and
right audio signal external output terminals' L% tRK are supplied through.
(5L), (5R) are left and right external speaker systems, and in the -S example, one speaker each,
the left and right audio signal external output terminals tL, tH can be connected to each other.
Each of (δL) and (5Ft) may be a single speaker for full sound, or may be composed of a plurality
of speakers with different assigned sound ranges. Fig. 3 shows the appearance of a cassette (6)
4B-35304-07 tape recorder with radio to which the present invention is applied. This cassette
tape recorder (playback apparatus main body) 19) has a generally flat housing, and on its front
panel (10a), a U cassette insertion hole, 02 is a cassette, α 9 is an operation button, I Is a radio
receiver dial, 09 is a ladder, OQ is a switch. Thus, the above-mentioned left and right built-in
speakers (IL), (1 @ are attached to the inside of this housing, (1.alpha. Left and right side plates
(10 b), (loc). Oe is a sound emission hole for the right built-in speaker (IB) provided in the right
side plate (10C), and a sound emission hole for the left built-in speaker (IL) K similar to the one
not shown is also for the left side plate (10b) K It is provided. Note that (to) is a handle. In the
normal use state, that is, the use state of the fangs 1, only the cassette recorder 9 which is the
reproducing apparatus main body performs K reproduction. In this case, as described above with
respect to 11 / K, the left and right built-in speakers (IL), (left and right channel sounds from 110
are obtained from the husband, and the second grade sound is acoustic KfflJ in space). Be done.
In such a state of use, it is possible to admire the stereo reproduction even indoors rather than
indoors. (Q) In the use condition of 4B-35304-98C hi, 2 year old, in addition to the first use letter
11, the left and right external speakers (5 L), (5 w connect voodo (2), ( Through the left and right
audio signal external output terminal tL, # followed by the left and right external speakers (5L),
(510 as the front speaker, the left and right built-in speakers α0, α 玲 as the rear speakers And
4 channels (7 pseudo 4 channels) stereo playback, l? IIi do, in this case select the mixing ratio-for
example 0.7 @ degree. In this case, the left and right external speakers (6L) and (51O can be
widely spaced apart from each other as the front speakers, so that in this case the taste is
different from the usage condition of the fan 1 and the stereo feeling is large And you can get a
sense of presence. IFIs figure and O figure 6 are the modification of the cassette tape recorder of
4 years 3 figures, and the sound from built-in slay force (IL) and (IR) in the letter 11 of the abovementioned 9 years 1 figure mentioned above It is the case that it is made to be sufficiently
transmitted forward.
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In the example of 5 years of age, a reflection plate (solar) is provided on the horse's side on the
sound emission hole side of the housing (1 (side plate Qob of I, (10c)). In the example, the left
and right inner stems of mebica (IL), (110, 48, 35304-09, respectively, are stored in respective
separate boxes @, and the box ■ is hinged to the side plate of the housing 00 10b), (loc) K in a
case where K is mounted so as to be rotatable. This box @ is normally fitted in the side plate (lob),
(10c), and when necessary, is extended like a wingboard to the outside of the side plate αob),
(10c) as shown by a two-dot chain line. . According to the present invention to be described
above, a large apparatus can be obtained with a small device having built-in speakers, and one
channel stereo reproduction can be performed by connecting external speakers as needed. That
is, it is possible to perform stereo reproduction with a great sense of stereo, which differs in taste
depending on time and place. In the above, the case where the present invention is applied to a
cassette tape recorder with a radio has been described, but any tape recorder, magnetic
recording / reproducing apparatus, radio receiver, television receiver, etc. The present invention
can be applied to other stereo reproduction devices such as a record reproduction device. + T +
48-35304-1.0 or the above-mentioned left and right built-in speakers (1 L), (IR) K, and further, a
central built-in speaker is provided to supply the sum signal of left and right audio signals to this
central built-in nus beaker It is good. Figure 1 shows the principle of the stereo reproduction
device used to explain the present invention, FIG. 2 shows a system diagram of an example of the
stereo device of the present invention, and FIG. 3 shows a stereo reproduction device to which
the present invention is applied. FIG. 4 is a perspective view showing the appearance of a
cassette tape recorder with a radio, FIG. 4 is a perspective view showing a state for use of the
cassette tape recording with the radio, FIG. 5 Mio and FIG. 6 are other examples of the cassette
tape recorder with a radio, respectively. Essential 8 of the appearance of! FIG. (IL), (IR) are left
and right inner speaker systems, (2) is a mixing circuit, (a cassette tape tape recorder with a radio
which is a 91-piece reproduction device body, (5L), (5 → is a left and right outside Show a S1
beaker system. Utility model registration applicant Sony Corporation (i6) 48-5; j-tt agent Ito first
rule-3 t-lump total = SR-threat f LY2. -, -7'2 swing i, -'7 .. 'ρ5. ,, -2, 7) 厨-yn-tf T heart-Fig. 2
TR2TL4 RRL t R-35304 -12 Fig. 3 "1 stock i12 keystone 013 first + grasp 5 Ri (!:,!!
4B-35304-13LNh FIG. 5A 3 ° k 610a% FIG. -% 1 ≦ s,> x / 6 48-35304-14 to 1 '6, Inventors
other than the above, utility model registration applicants or agents (1) Inventor address
(location) Komachi, Kamakura City, Kanagawa Prefecture 2 210 10 6 ν 八 8 Address
(whereabouts) Name Address (whereabouts) Name Address (whereabouts) name (2) utility model
registration applicant address (whereabouts) name (country) (country ji) address (whereabouts)
name (name) ) (Nationality) (3) Agent 48-35304-15
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