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JPS5165901

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DESCRIPTION JPS5165901
Description--WAO Name Audio Signal Reproducing Device Detailed Description of the Invention
Book Qli? ! The present invention relates to an audio signal reproducing apparatus using a head
phone, and in particular, it is possible to give a listener a localization name of a sound source
located before and after. In an audio signal reproduction apparatus, when listening to stereo
sound with a head-on, the left and right sound sources can be clearly localized relatively, while
the front or back sound source can not be localized forward or backward, and the center of the
head It is unfortunate that the listener feels unnatural, and the sense of presence is impaired, as
the sound source is as if there is a sound source nearby. Sense of the direction of the sound
source and the sense of distance are distinguished-especially with regard to the one-way
discrimination of sound sources located in front and back, in the case of fixed head and in the
case of moving 9 There is a difference. This is confirmed by various actual injections. Therefore,
even when listening to stereo sound using the head phone, if the level, phase, etc. of the left and
right sound are changed according to the movement of the head, the distinction between the
front and back of the sound source becomes clear and the presence feeling can be obtained It
will be by itself. Accordingly, in view of the fact that the present invention is sufficiently put to
practical use by using ordinary stereo-sound localization using level difference localization, the
present invention has been made as a solution to the above-mentioned problems. EndPage: 1
Head-on with WAWh negative detection means for the above reference position signal, and the
voice of the left and right ear speakers of the head-on according to the V pel or phase difference
of the rotation angle detection circuit. In order to control the confidence bell or the spread phase
difference, for example, the detection level of the left side becomes larger when the listener turns
to the right, so that the volume of the left ear speaker becomes large), The detection level of the
right side is high with the left direction facing, and the volume of the left ear speaker is large.) It
is configured to give a sense of presence as if there is a sound source in front of it. An
embodiment of the present invention will be described below with reference to the drawings. , In
11181 (υallE3 [! Fig. 5 shows a rotation angle detection circuit for the reference position signal
transmitted from the reference position signal transmission II (B) of the reproduction sound field
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(A) as shown in IL. In the ultrasound compensation echo attacked by the head toe / (H), an
ultrasonic signal transmitted from the above-mentioned transmitter CB) is received by seven
microphones on the left and right (zL) (IR). As shown in the sg, for example, the head over (H)
and the left and right of the left and right of the miter wheel (dew L) (gR) are fixed.
Rectification detection is carried out with a tightening circuit (-3L) consisting of input signal
diode (Dl), = nden "l" (C1) and resistor (R1) from the above one miter pole (2L) Is converted to a
pulse with a time width, and is converted to a pulse with a time width, which is supplied to the
flip flop circuit (set input terminal (8) of the frame, or the other one from the miter on (tR). The
input signal line diode (DO, rectified by a rectifier circuit (3R) consisting of gondenna (C and
resistor C0) is rectified and detected, and is supplied to the reset side input terminal (r) of the
feedback loop circuit (5; The output signal from each output terminal (QL), (QR) is an integration
circuit (6L) consisting of a resistor (R1) and a hundenna (C3), a resistor 4) ′ ′; and an
integration circuit from a hdenna (C4) (Integrated at 6 玲 to obtain an output signal. (〒I), () R)
are left and right signal transmission paths for supplying two channels of sound-signals to the
headphone (H), to which amplifier (8L), (8R) are respectively connected. Man. The force signal is
amplified and supplied to the left and right ear speakers (HL) and (HR) of the headphone (H) in
FIG. (9) is controlled by the output signal of the rotation angle detection circuit (1), and the audio
signal transmission path () I,), (? R) A signal level variable circuit that controls the signal level
relatively in the reverse direction, and special semiconductor elements (IOL), which will be
described later, (1o FD is variable in impedance!). It is used as a child w4. These semiconductor
devices oraora, CLOI () expansion gate) 11 MO 8 FKT, P and ij N source and drain regions are
formed on one side of the N 11 t company P type semiconductor substrate, and between these
regions An i antibody layer is formed through the surface of the substrate to be applied
(insulating layer), a source electrode is formed in the source region, a source terminal (8) is
drawn out, and a drain electrode is formed in the drain region. While forming the drain terminal
(D), the first gate electrode and the second gate electrode are formed at both ends of the source
region and draining region-proximate i of the resistor layer, respectively, to form a first gate. The
terminal @ and the second gate terminal (stock)) are respectively derived, and the back surface of
the base body is further constructed so as to derive a batter gate terminal (eb). The connection
point between the semiconductor element (IOL 4), Qol 'QO first gauge terminal Os) and the
second gate terminal Gt) and the resistor resistor is the output end of the rotation angle detection
circuit (1), that is, integration A switch (U) is connected to the output side of the circuits (6L) and
(6R) via a changeover switch U, and a drain terminal (CD) is connected to signal transmission-(TE
L), () R) Gonden (Os) ftt is connected in parallel between the gate terminal 011) and the drain 4
(D) and at the same time the) 1 gate terminal G1) is grounded via the resistor W8) and the source
The negative terminal 4I11 of the power supply (E) is connected to one terminal (S).
A reverse bias voltage is supplied to the backgound (Gb) as necessary. In the audio signal
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reproduction apparatus configured as described above, for example, the synchronization signal
transmission 11 1 (B) installed at the normal image position of the reproduction sound field (A)
in FIG. Sound wave ★ It is sent at 1 ffl 1 interval. Vht, a listener or a person wearing a
headphone (H), if properly turned to the right with respect to the signal transmitter CB) in a good
condition, the left side of the rotation angle detection circuit (1)! Ikuhon EndPage: 2 茅 °: 予 j (2
L) receives the above-mentioned super sound 諷 signal, the right side microphone 17 on (11 R)
例 え ば eg Oll ”/! S30 rr / 'wO, Sff1 sO'-When receiving the difference, as shown in No. +1 111
K, each signal 嬬 rectification circuit (3 L) and (3 R) or square wave (j), (b) The signal from one of
the rectifier circuits (sL) (a single-anchor multi-pipe rake circuit (4) is rectified and detected, the
vertical circuit (4) K is fixed, and the transmission interval of the ultrasonic remarks above) That
is, it is converted into a rectangular wave (0) having a time width of +, that is, 0.8 m-, and is
supplied to the set side input terminal ° (S) of the flip-flop 4 circuit (6). When the signal -t (b)
from the other rectifier circuit (3R) is supplied to the flip-flop circuit (reset-side input terminal (r)
of the group, the left output terminal (QL) K is on the reset side. (Falling)-by the signal (b)
supplied to the input terminal (r), and rising set by the falling of the square wave signal (0) from
the monostable multivibrator circuit (4)). Signal (d) appears, while the reverse output signal (.) Of
the left output terminal (QL) o output signal-IKd appears on the cloth side output terminal (QR).
Sound volume received by the right side microphone (2R) (b) (Yaoi's dream) (for example) 0.
Since gms is received with delay, the cough signal (b)] is performed during the operation of the
input signal (0) from the monostable multivibrator circuit (4), The conduction time of the output
signal (d) of the left output terminal (QR) is equal to the non-conduction time, the output time of
the right output terminal (Ql'l) * (@) is conversely the conduction time is non-conduction time
Yes, so that both output signals 1) (d) (·) have high output level of left side output (QL) than
output level of right side output (QR)), integration circuits (6 L) , (6R) are integrated 1 and
supplied to the semiconductor elements QOI4) and oOFo of the signal level variable circuit (9) via
the changeover switch a.
The sound signal of the signal transmission line (γL) of one of the semiconductive integrated
elements 0) is high in level, and the sound of the other signal transmission line (路 R) is low in
level. Both audio remarks are supplied to the left and right ear speakers (HL) and (HR) of the
headphone (H), and the volume of the left ear speaker (HL) is increased. Ru. If the listener turns
appropriately to the left, the right angle microphone 17 on (2R) of the rotation angle detection
circuit (1) first pays attention to the recorded sound wave signal, and the pregnancy microphone
(2L) is received with a time delay of, for example, O, gms in reverse to the above, and as shown in
FIG. 2, the input signal from the right side microphone (2R) is a rectangular wave by the rectifier
circuit (3R)-to-. (B: rectified and detected to be supplied to the reset side input terminal (r) of the
slip flop circuit (5), and an input signal from the left microphone (2L) is rectified with the above
signal (by) Converted to a rectangular wave (C) 'of 0.5 ms time width in the rectification R1
monostable multivibrator circuit (4) to a rectangular wave 0) and' L 'at 3 L) and the set side input
terminal of the slip flop circuit (5) It is a source of Set the output signal terminal (8) of the left
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output terminal (QL) from the falling edge of the rectangular wave signal (C) ′ supplied from the
monostable multivibrator circuit (4) to The interval time between the output signal (d) 'and the
rising edge is longer than one passing time of the rectangular wave signal (C)'. So it's a slick flop.
The output signal (e) 'of the left side output (QL) of path (5) -1) (d)' is shorter (the conduction
time is shorter than the non-conduction time), conversely the output signal (e) 'of the right side
output QR is the conduction time And the output level of the left output (QL) is smaller than the
output level of the right output (Ql'l), so that the semiconductor element QOI of the per-vir *
circuit The level 1 small signal and the large semiconductor element αOIO are operated by
supplying a thick 1 level signal respectively, and the signal constant becomes large to be heard. If the listener is facing V% to the front, the left and right of the rotation angle detection circuit
(1)! At the same time, the above ultrasonic signal is received from Ikububuen (2L) (IR), and the
left side microphone quadruple (2L) to the rectifier circuit (: sL), monostable multivibrator circuit
is connected to the alifth float circuit (5) (4) is firstly supplied from the supplied square wave
signal and the right side miter gate (2R) to the rectifier circuit (311) and the end page: No. 3 is
simultaneously supplied. The output signal of the terminal (QL) has the same waveform as that of
the above-mentioned rectangular wave signal, that is, conduction and non-conduction are
performed at a time interval of 10 times of the upper ultrasonic wave signal recognition
transmission interval. The conduction time becomes equal and the output signal of the right
output terminal (QR) also becomes equal to the conduction time and the non-conduction time.
Therefore, the output levels of the left output terminal (QL) and the right output terminal QR
(QR) are equal to each other), and the same bale signal is supplied to the both raw conductor
cords α0 υ and QOJ of the signal level variable circuit (9) The voice signal transmission line
(7L) (7R) is controlled at the same level and operated from the left and right ear speakers (HL)
(HR) of the head 7 o'clock (H). Be Also, if the sound source of the audio signal is positioned
forward (backward) to the loser, it is essential! ! (By switching the switch Qn connecting the
dynamic angle detection circuit (1) and the signal level variable circuit (9)) directly and from the
fixed to the cross reverse state), the sound source is backward (forward) It is possible to switch to
an audience, to be blinded. In addition to the above embodiment, the reference position signal
gate signal dynamic angle detection circuit (! By demodulating the left and right outputs of) and
measuring its phase difference)! (1) Find the time difference, operate the signal level variable
circuit (9) accordingly, and control the level of the audio signal transmission path () L) () R by K.
The directionality detection layer (2) of the bond is attached to the eyelid as a pivoting angle
detection circuit (1), and the above-mentioned signal transmission II (J31) @ H, for example,
ultrasonic waves having different numbers of peripheral liquids are transmitted. In this state, due
to the directivity of the 9 detector (2) and the signal transmitter 031) or @ 吟 signal being
detected by the headfo: 104) to change the direction of the order, the respective signals are
detected, respectively. The signal level variable circuit ((d)) is operated by the ratio of to control
the level of the audio signal transmission path () L) (7R) to make a turtle. The above-described
embodiments are configured to control the level of each implementation side line audio signal
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transmission path () L) () R), but in the above embodiment, the signal level variable circuit (9) is
substituted for. A signal phase variable circuit is provided and controlled by the signal from the
phase winding angle detection circuit (1) of the audio signal of the audio signal transmission path
(ツ L) (〒R)), and the headphone of the audio signal (H) The time to arrive at the ear speaker (HL)
(HR) of the speaker is configured to change the name, and in particular, the signal level variable
circuit and the signal phase variable circuit are used together, and the audio signal transmission
path () If the L and () R) sound and voice signals are simultaneously controlled in level and phase,
the effect is remarkable. Furthermore, not only ultrasonic waves but also radio waves, light, etc.
can be used as detection means. As described above, according to the present invention, the
signal level or the phase of the signal transmission path for supplying an audio signal to the head
7 on can be changed by the movement of the head) As it is controlled, it is similar to the case
where a person who turns the head during his / her job and listens directly to the both ears by
the level or phase difference of the audio signal reaching the both ears through the ear speaker
of the earphone The direction of the sound source and the sense of distance can be determined,
and in particular, the sound source for back and forth equipment can be localized forward to the
rear, giving excellent sense of reality.
ことができる。
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a connection diagram showing an example of a
reproducing apparatus according to the present invention, FIG. 1 is an explanatory waveform
diagram in the connection diagram of FIG. 1, FIG. 3 is a plan view of an example showing an
arrangement state, FIG. 4 is one thousand W i on the other side showing the arrangement state,
and FIG. FIG. 6 is a perspective view of an example of the head 7 on, and FIG. 6 is a perspective
view of the head on the other side of the present invention. In the figure, (A) is a reproduction
sound field, (B) is a reference position signal transmitter, (H) +4 heads 7 on, (HL) is a left ear
speaker, (HR) is a right ear speaker, and (HB) is one. Connection band (1): rotation angle
detection circuit, (2) ultrasonic receiver, (2L) left microphone, (2R) right microphone, (3L) left
rectifier circuit, (3R) right rectifier Circuit, (4) a monostable! (6) is a left integration circuit, (6R) is
a left integration circuit, () L is a left signal transmission path, and () R is a right signal
transmission path , (8L) EndPage: 4 紘 left amplifier, (SIR) a right amplifier, (9) line signal
variable circuit, QoLj, QOFo 4 conductor elements, (8) source terminal, (D) Is a first gate terminal,
(Gz) is a second gate terminal, (Gb) is a pack gate, and (11) is a changeover switch. Patent
Assignee-Noiichi Co., Ltd. Fig. 2, Fig. 4 EndPage: 5
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