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JPH0553395

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DESCRIPTION JPH0553395
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
binaural receiver (hereinafter referred to as "headphone") such as headphones, earphones and
receivers.
[0002]
2. Description of the Related Art Conventionally, headphones have a circuit configuration in
which an audio signal on the left side is separated to a receiver on the left side and an audio
signal on the right side is separated to a receiver on the right side.
[0003]
[0003] This has had the following disadvantages.
(1) In stereo sound reception, the sound can be heard by both ears regardless of whether it
comes from either the left or right speaker, but with conventional headphones, the audio signal
on the left reaches only the handset on the left and goes to the handset on the right Does not
reach. Likewise, the right voice signal only reaches the right handset and not the left handset. (2)
Therefore there is a feeling of pressure on the ear and the ear is easy to feel fatigue and pain. (3)
Because of the above-mentioned unnatural feeling and hate feeling, long-term use tends to be
avoided.
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1
[0004]
SUMMARY OF THE INVENTION The present invention has been made to solve the abovementioned drawbacks, and as shown in FIG. 1, various types of signals may be provided between
the left and right audio signal lines (4) and (4 '). An unnatural feeling cancellation receiver at
stereo reception characterized in that a circuit is configured by inserting a resistor R (1)
corresponding to the receiver.
[0005]
First of all, to the receiver input terminal of the present invention, a re-stereo audio signal is
added from another output device.
That is, stereo audio signals sharing the common terminal (C) are respectively applied to the
audio signal input terminal (L) on the left side and the audio signal input terminal (R) on the right
side. The left and right audio signals are supplied to the respective receivers (3) and (3 ') through
the audio signal lines (4) and (4') and the common line (5), and can be heard as sounds as shown
in FIG. However, since the resistor R (1) is inserted between the left and right audio signal lines
(4) (4 ′), the left audio signal passes through the resistor R (1) to the right receiver (3 ′ The
audio signal to the right and to the right is also split through the resistor R (1) to the handset (3)
on the left and is also supplied to the handset on the other side. In this way, the left audio signal
is heard at the same time as the left ear, while the smaller one is also heard by the right ear, and
the right audio signal is also heard at the right ear, while the slightly smaller one is for the left
ear. You will hear it. That is, as shown in FIG. 3, the situation is the same as when listening to
stereo sound from the speaker.
[0006]
Embodiments of the present invention will be described below. (A) The left and right voice
signals are supplied to the respective handsets through the voice signal line and the common
line, and can be heard as voice. (Fig. 1) shows a connection circuit diagram, but inserting a
resistor R between the left and right voice signal lines as shown in the figure splits the voice
signal by the resistor R and supplies it to the handset on the opposite side. Will be (B) As an
example, when the impedance of the headphone is 50 ohms and the resistance value of the
resistor R is 50 ohms, the audio signal on the left is supplied to each handset at a rate of 1 on the
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2
right and 4 on the right . Similarly, the right voice signal is provided to each handset at a rate of
"1" to the left and "1" to the left. (C) As described above, the left and right audio signals can be
heard by both the left and right ears, respectively, so that it is possible to hear a natural sound
like when stereo sound is being heard by the speakers. (D) Note that depending on the ratio of
the impedance of the headphone and the resistance value of the resistor R, a drop in the high
range may appear due to the phase difference between the left and right audio signals, so as
shown in FIG. It may be necessary to supplement inductive reactance XL in series.
[0007]
Effects of the Invention (1) At the time of stereo reception, the feeling of pressure on the ear is
eliminated. (2) As long as the sound is not so loud, fatigue and pain are not felt in the ear despite
the use for a long time. (3) There are some effects that are effective for preventing the
occurrence of hearing loss symptoms that may be caused by long-term use of headphones.
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3
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