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Description 1 Title of Invention
Headphone stereo signal synthesizer
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stereo signal
synthesizer suitable for headphones, particularly by electrostatic transducers. Recently, there is
something remarkable for the widespread use of audio devices, and along with this, there is also
a rise in quality. And one of the guidelines for upgrading is to create natural sound without
discord. By the way, listening to stereo sound with headphones is also popular, but when
EndPage: 1 stereo sound is heard with conventional headphones, the localization of the sound
image is directed to the overhead body, so it is quite unusual compared to the case with speakers
It had a defect accompanied by a feeling. For this reason, a technique has been developed in
which the localization of the sound image is produced in space by passing the sounds of the left
and right channels in the stereo sound through the cross network and synthesizing the sounds of
antiphase components on the left and right. Since the cross network for this purpose is
constructed using the inductance L1 capacitors C and ((R, it has a complicated drawback in that
these parts have to be prepared separately. On the other hand, since it is necessary to increase
the signal voltage in headphones using electrostatic transducers, a step-up transformer is
indispensable. Therefore, the present invention has been made in view of the above points, and
by using a transformer to synthesize the sound of the antiphase component of the left and right
sound in the stereo signal, the conventional cross network can be used. A very good headphone
stereo signal that can be made as simple as possible so that part or all of C and H can be
eliminated and the hair can be used as a d boost transformer when applied to headphones with
electrostatic transducers. It is intended to provide a composite attachment. Moon) This
embodiment of the present invention will be described in detail with reference to the following
drawings. That is, FIG. 1 shows a transformer having a magnetic path M, M2, which are coupled
in opposite directions to each other when adding the car-right audio signal in the stereo signal
and the reverse phase components of R to the signal line 1j and combining them. T, is used. That
is, in this case, the left and right signals of the stereo signal and R are supplied in reverse phase
relation to the primary side winding N11 + ′ ′ + 2 wound in response to the magnetic paths M,
M in the transformer T1. Do. Moreover, magnetic path M0. To the secondary side winding wound
in 1 to 1 corresponding to \ M 2 \ \ + 3 + N) 41 characters 1! The left and right signals i, /, R /
obtained by adding opposite phase components to each other are derived from 5 and 1
And, the combined output L / of such stereo signal. As R 'is supplied to the headphones and
downturns are localized to space sounds that are not directed upwards but come out like the
orientation of the publication multiple times)-they are the same as the base by speakers And Cali
(ij et al. 0 second sister 1 sister other embodiment which becomes possible as a self-friendly
sound without a sense of chaos, or this other example is shown. Left and right signals of the
stereo signal are wound in the opposite direction of the primary 篭 糾 · “21 + N2 □” between
the core C and the C3 phase forces of the core C2 and the 11Ti end of the core C2 and 111 Ti. A
composite output of a stereo signal in which opposite phases from each other give shadows to
the other side from the secondary winding N23 + N24 wound around t corresponding to the core
C, C3 at the end. i, /, IR / is taken out. 第 FIG. 3 also shows other T and flow side, and in this case,
each of the secondary and secondary windings N31 + N33 is “32” * 2 trans T3'a with N34.
The T and b correspond to the left and right signals ML and R of stereo No. 8 and, by winding
them on the tertiary winding N35 + N36 庖 − wound corresponding to the two transformers T3a
and T3b, the reverse phase components to each other There is a thing τ 'which is made to talk
to the other side. Also, in this case, by adding a delay J such as a delay line or a circuit such as a
broken line shown in 1 shown in FIG. The localization of the image can be further improved by 1
°) In addition, in the case where the electrostatic (electret holding) type transducer is applied to
the het moon by the above, boost 7 lance, which is indispensable for converting the signal to
voltage, Of course, it can be used as a transformer for synthesis of sprays and shins, and it is of
course possible to make various shapes and general use without departing from the scope of the
present invention. Therefore, as described in detail above, by using a transformer to synthesize
the sound of the antiphase component of the left and right sound in the stereo signal, the
conventional cross network 1, by narrowing. Apply C or H partially or completely unnecessary, in
particular to headphones with an electrostatic transducer EndPage: 2, in the case of 2 to be used
as a toss for pressure as well as a temporary bar )) 皇 皇 ・ ・ ラ ラ ラ ラ ラ ラ ラ ラ ラ ラ ラ ラ
ラ ラ ラ ラ ラ ラ ラ ラ ラ 荀 荀 荀 荀 荀 荀 荀 昇 昇 昇 昇 昇 昇 昇 で き で き で き で き で き.
4. Brief description of the drawings FIG. 1 is a block diagram showing an embodiment of the
headphone signal combining system according to the present invention, and FIG. 2 and FIG. 3 are
other different embodiments. It is a block diagram shown. T, ... Transformer M, M, ... Magnetic
path N119NB ...-Next side winding N13 + N14 ... Secondary side winding applicant Attorney
Attorney Takeshi Suzue J'3 ((T3aEndPage: 3
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