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DESCRIPTION JP3183295

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DESCRIPTION JP3183295
PROBLEM TO BE SOLVED: To provide a 3D headphone stereo that enables a more realistic real
sound field reproduction by enhancing the surround effect and improving the sense of presence
in reproduction of sound source movement of headphone stereo. An audio signal is intermittently
separated in a short time by a 5 multivibrator circuit and a 4-pass relay unit, a certain tone range
is emphasized by a 6 equalizer, a sound level difference of a specific sound source is measured,
and a delay time is controlled. A 3D headphone stereo that is amplified by multiple AF amplifiers
by means of a surround delay time correction circuit and output to 17 3D headphone sections
consisting of 3 speakers including 14 bone conduction speakers. [Selected figure] Figure 1
3Dヘッドホンステレオ
[0001]
The present invention relates to a headphone stereo with improved reproduction of sound field
movement.
[0002]
An audio device in which a tape recorder is connected to a headphone for the purpose of
enhancing sound quality and listening to a good sound in an individual targets a sound source in
a state where a sound field of music software to be played is stationary and moves the sound
field It was not suitable for the reproduction of perspective.
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Therefore, although the device of a surround circuit was devised for reproduction of a live sound
source, the point to which the clarity of presence was lacking was a problem.
[0003]
An object of the present invention is to provide a stereo radio broadcast and a 3D headphone
stereo capable of improving and reproducing the realism of a stereo sound source as one of
means for solving the above problems.
[0004]
A specific sound range is selected from the live sound source, and the difference in sound level
due to a slight time difference is measured at the frequency of the sound range, and from this
difference the perspective frequency is recalled from the ROM in an amount that changes the
delay of surround time. In addition to the bone conduction speaker provided, 3D headphones are
proposed which simultaneously emit and play sound from the three-way speaker together with
the left and right speakers.
[0005]
Furthermore, it can be seen that the sense of depth is more realistic in three directions including
the bone conduction speaker than when listening from the left and right speakers, and the sense
of depth changes when the time difference is changed.
[0006]
Utility model registration No. 3174965
Means to solve the problem
[0007]
Measure the frequency of the specific sound range of the audio input signal and divide it by a
short time, and use the means to make the surround delay by the delay time recorded in the
ROM from the sound level difference information to input stereo broadcasting and stereo sound
source from the audio input signal The pulse oscillated from the multivibrator circuit enters the
pass relay unit, and the pulse voltage is repeatedly turned on and off to separate the sound of the
sound source very quickly, and the equalizer picks up a specific sound range and adds it to the
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surround delay time correction circuit. It is a thing.
[0008]
On the other hand, the left signal input terminal and the right signal input terminal are divided
into left and right signals by the left and right signal separation input circuit, amplified by the left
and right amplifiers of the AF amplifier, and left and right reproduction sounds are produced
from the left and right speakers constituting the headphones.
[0009]
The sound is controlled by the central AF amplifier through the surround delay time correction
circuit, and the sound of which the time difference is controlled from the bone conduction
speaker is heard from the back of the head by vibration.
Effect of invention
[0010]
In the present invention, it is more realistic to add speaker sound source from the back of the
head and to reproduce the sound more than reproducing with the left and right two speaker
sound source in headphones, and at the same time changing the delay time of surround to enjoy
3D sound with better feeling of movement.
Therefore, the stereo sound source is divided finely and the intensity of the sound is detected,
and the delay time changes, so you can enjoy live music lively easily with headphones.
[0011]
Wiring diagram of the 3D headphone stereo of the present invention.
The figure of the whole composition of 3D headphone stereo of the present invention.
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FIG. 7 is a diagram of a surround delay time correction circuit including a bone conduction
speaker.
[0012]
Hereinafter, one embodiment of the invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a diagram showing the wiring of the 3D headphone stereo.
1 is an input terminal (common part).
An audio input signal is input to this input terminal (common part).
On the other hand, stereo audio signals are input to the 2 left signal input terminal and the 3
right signal input terminal.
[0013]
The 1 input terminal (common part) is connected to the 7 left / right signal separation input
circuit and the 4-pass relay part and connected to the 5 multivibrator circuit. The multivibrator
circuit continuously oscillates a pulse wave to turn on and off the 4-pass relay unit to separate
time. The oscillation frequency of the multivibrator circuit uses a relatively high frequency. The
4-pass relay unit is connected to the 6 equalizers.
[0014]
The 2 left signal input terminal and the 3 right signal input terminal are both connected to the 7
left and right signal separation input circuit. The six equalizers are connected to the eight
surround delay time correction circuit. The 7 left and right signal separation input circuits are
respectively connected to a 9 AF amplifier (left) unit and a 10 AF amplifier (right) unit which are
dedicated amplifiers.
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[0015]
After amplification, the 9 AF amplifier (left) unit is connected to the 11 left speaker, and the 10
AF amplifier (right) unit is connected to the 12 right speaker. You can now hear stereo sound
from the left and right.
[0016]
The 8 surround delay time correction circuit is connected to the 14 bone conduction speakers
through the 13 central AF amplifiers. There is a shift that becomes echo that reproduces the
sense of movement of the front and back sound images, and echo from the 14 bone conduction
speakers can be heard directly by the bone conduction vibration of the back of the head.
[0017]
The 8-surround delay time correction circuit is disclosed in the utility model registration No.
3174965, but uses a technique as shown in FIG.
[0018]
DESCRIPTION OF SYMBOLS 1 input terminal (common part) 2 left signal input terminal 3 right
signal input terminal 4 path relay part 5 multivibrator circuit 6 equalizer 7 left and right signal
separation input circuit 8 surround delay time correction circuit 9 AF amplifier (left) part 10 AF
amplifier (right) 11) Left speaker 12 Right speaker 13 Central AF amplifier 14 Bone conduction
speaker 15 Headband 16 3D headphone stereo body 17 3D headphone unit
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