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JPS5539435

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DESCRIPTION JPS5539435
Description 1 Title of Invention
ヘッドホン
Detailed Description of the Invention The non-invention relates to a headphone capable of
providing a full sense of presence similar to listening by a speaker. This type of headphone is
known from, for example, JP-A-52-42701, and according to this, a signal corresponding to an
indirect sound is generated from the output signal of one channel through a phase shifter or the
like, Signal as sound Add to the direct sound signal of all other channels. Then, by driving the
diaphragm of the headphones with this added signal, the sound image is localized outside the
head of the listener. However, with this headphone, is it a signal as an indirect sound in the direct
sound signal? Not only is the configuration of the circuit complicated because of the electrical
addition, but there is also the possibility that it will be monaural as a sense of hearing. Therefore,
it is an object of the present invention to provide a simple headphone having a configuration that
can be localized outside the head of a full sound image listener without any loss in stereo sound
sense. The features of the non-invented headphones are: EndPage: 1 Voice coil for driving the
moving plate, and the first coil. And a second coil concentrically wound with respect to the first
coil, one channel signal is applied to the first coil, and the other phase-shifted to the second coil.
All channel signals are to be applied. DETAILED DESCRIPTION OF THE PREFERRED
EMBODIMENTS The present invention will be described in detail in the accompanying drawings.
Referring to FIG. 1 entirely, the voice coil C is wound around a cylindrical coil winding frame 2 of
the diaphragm 1. It is located in the magnetic field gap formed between the center pole 6 and the
yoke 7. The voice coil C has a first coil 4 and a second coil Toshina that are wound concentrically
on the coil winding frame 2. In the embodiment of the present invention, the ratio of the number
of turns of the second coil 5 wound to the inner side with the second coil 5 wound to the inner
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side is 1: 1. , This ratio can be arbitrarily changed. The signal input side to the terminal a of the
first coil 4 and the terminal C of the second coil 5. The terminal end of the first coil 4 and the
terminal end of the second coil 5 are respectively connected to the ground side. In this case,
when the coil wire is continuously wound from the second layer of the terminal bi- and cH, i1 coil
4 to the first layer of the second coil 5, an extra wire is drawn in a coil conductive loop shape,
After the winding operation of the coil wire, a J-niji is formed to cut the coil wire drawn out in a
loop shape.
In addition, reference numeral 3 is. Dumbarke shows. FIG. 2 shows a modification of the voice
coil used in the present invention. This voice coil comprises a first coil 11 flatly wound on the
surface side of a flat diaphragm 10, and a back surface of the diaphragm 10. And a second pile
12 wound flat. In this case, the first coil 11 and the second coil 12 are configured concentrically
on the front and back sides of the diaphragm 10 as coils having the same number of turns, and
viewed from the respective planes of all the coils in the winding direction. 13. In the same
direction, in this example the diaphragm for the hour, the diaphragm for the L8i left ear, 13. '14
id shows a phase shift circuit. The first coil 4 of the voice coils for driving the diaphragm R6 ヲ is
connected to the output terminal of the right channel 、, and the second coil 5 is connected to
the output terminal of the left channel L via the phase shift circuit 14 There is. Similarly, the first
coil 4 of the voice coils driven by the diaphragm L8 is connected to the output terminal of the left
channel L, and the second coil 5 is connected via the phase shift circuit 13 to the output terminal
KW of the right channel R. It is continued. Referring to FIG. 4 completely, the phase shift circuit
13.14. It is composed of a parallel circuit of a high frequency range phase shift circuit 19 and a
low frequency range phase shift circuit 20, and the high frequency range phase shift circuit 19 is
provided with a series connection of a capacitor 15 and a variable resistor 16 The phase circuit
20 is provided with all the one-row connection of the inductance 17 and the variable resistor 18.
reference,? 16. The switches S □ and S2 are switches for turning on and off the circuit 19 and
the circuit 20, respectively. The switches S □ and S2 and a variable resistor, 16. , And Iai
listeners can be operated at will side 5-. The phase shift amount of the phase shift circuit 13.14 is
preferably about 5 to 20 milliseconds, and this is preferably a variable resistor 16.2. It can be
adjusted to '1'8. Of the signals from each channel, a bass signal of relatively low frequency (IKH2
or less) passes by one circuit 20, and a bass signal of relatively high frequency (IKH2 or more
passes by one circuit 19) Eri are respectively phase-shifted and attenuated and applied to the
second coil of the other diaphragm as an indirect sound signal having one phase difference and
one level difference. Therefore C1 bass signal. The second coil is driven in the normal phase via
the circuit 20, and the second coil is driven in the reverse phase via the entire one circuit 19 for
the high frequency range signal. これにJ:9. The sound image can be localized with nine
spreads outside the head. In the case of b in the headphones according to the invention, the first
coil 4 of the voice coil C is driven by the direct sound signal from one channel, and the second
coil 5 is supplied with the phase shift circuit all valves and other channels Since it is driven by
the indirect sound signal, the direct sound signal and the indirect sound signal 6-EndPage: No. 2
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are directly synthesized on the diaphragm 1.
The same can be said for the voice coil consisting of the flat first coil 11 and the second coil 12
shown as a modification in FIG. That is, according to the present invention, the sound image can
be localized outside the head of the listener without using a complicated circuit for electrically
adding the direct sound signal and the indirect sound signal totally. Moreover, compared to
headphones having an electric addition circuit t, it is possible to enjoy a more stereophonic
listening sensation.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of the entire voice coil used in
headphones of the non-invention, FIG. 2 is a modification of the voice coil, and FIG. 6 is a
sectional view of the voice coil shown in FIG. FIG. 4 is a connection diagram showing an example
of a specific configuration of the phase shift circuit. 1、10. R6, Ls... Diaphragm 4---first coil
51-second coil 1, 14-・ phase shift circuit 7-EndPage: 3
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