close

Вход

Забыли?

вход по аккаунту

?

JPS5397601

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS5397601
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a sound field in the case of 2channel stereo reproduction by speakers, and FIG. 2 is a system diagram showing an
embodiment in which only a delay circuit is added to a 2-channel stereo reproduction circuit. 3 is
a system diagram showing an embodiment of the multi-channel, FIG. 4 is a system diagram
showing an embodiment in which a sound quality correction circuit is added to a 2-channel
stereo reproduction circuit, FIG. 5 is a custom curve diagram of the sound quality correction
circuit, FIG. 6 is a system diagram showing an embodiment in which a delay circuit and a sound
quality correction circuit are added to the multichannel stereo reproduction circuit, FIG. 7 is a
system diagram of an indirect sound addition circuit, and FIG. 8 is a multichannel stereo L. o
reproduction Fig. 9 is a system diagram showing a system for giving a sense of localization to a
space, Fig. 10 is a schematic front view of an apparatus for detecting the rotation of the head of
the listener, Figure 11 is for head rotation Curves illustrating the change in length of time, FIG.
12 is a characteristic diagram showing the change in sound quality with respect to the rotation of
the head. 3 ...... listener, 8,9 ...... headphone unit, 10?13.20?27 ...... delay circuit,
32?35.42?49 ... и Sound quality correction circuit, 64 ░ 65 и и и и и и и и и и и reverberation adding
device, T6 и и и indirect sound addition circuit 28, 29 и и и и и и и и variable delay circuit, 30.31 и и и и
Adjustable sound quality correction circuit, 41 и и и и и и и и и adjustment axis, 19 и и и и и и и и и и и и и и и и и и
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
[Detailed description of the invention] When sound is reproduced with a head horn, it is always
necessary to use different signal sources, such as seven aural, two channel stereo, four channel
stereo, etc. It was only added to each unit of the headphone as it was in the form of the signal to
be applied to the speakers. As a result, the sound reproduced through the speaker is significantly
different from the sound reproduced, and the sound image is perceived as being in the listener's
head or in the head of the listener's head, and the sense of direction of the sound image as heard
through the speaker , Feeling of distance and feeling of unnaturalness etc. In addition, since the
09-05-2019
1
sound image is localized with respect to the head of the listener, when the head is moved, the
sound image is felt to move together with it, giving a sense of discord. ? ? ?, 2 ? Ti, by the
above headphones. The purpose is to remove a sense of discord that accompanies sound
reproduction, and to obtain a sound image and a sound field feeling similar to those reproduced
using a speaker. It is known that the time difference to reach both ears significantly contributes
to the sense of direction of the sound (2). Theoretically, if the sound source is sufficiently large
and the distance between both ears is l ?) and the sound speed is C (town seconds) if the
distance between the front of the listener's head is ? (radian), C (town second) The time
difference ?T (seconds) of the arriving sound is ?T key L sin ?. This is also confirmed by the
real, and becomes a theoretical value. On the contrary, when a time lag is given to the sound that
sounds to both ears, the sense of direction of the sound becomes the outward direction so as to
satisfy the above equation. Based on the above theory, we will consider two-channel stereo
reproduction with speakers. Fang 1 shows the relationship between listeners and speakers in 2channel stereo reproduction by speakers, with 1 and 2 facing the right and left channel speakers,
and 3 facing the middle of the picture speakers 1 and 2 Indicates a listener who is present.
Reference numerals 4 and 5 denote the right ear and the left ear of the listener 3, respectively.
The time taken for the sound emitted from the right speaker 1 to reach the right ear 4 by t ? ?
T1 and the time required for the sound emitted from the right speaker 1 to reach the left ear 5
(3), T Then, T,> T1, and the difference becomes the time difference ?T shown by the above
equation. Since the left speaker 2 is in a symmetrical position with the right speaker = 1, the time
taken to reach the sound output ear 5 emitted from the left speaker 2 is T1, the time taken to
reach the right ear 4 is T, and a time difference ?T occurs. When a headphone is used, the right
channel signal reaches the right ear, and the left channel signal reaches the left ear, which is
considered to be one of the causes of heterogeneity.
Therefore, in the present tlt, 1lyi makes the effect of the space of the speaker card and the
earwax work in the signal transmission circuit, and the effect similar to that reproduced by the
speaker is also obtained by the headphone. , Fig. 2 shows an embodiment thereof. 6.7 right and
left channel input terminals, to which a 2000 yannel stereo signal of the same shape as in the
case of reproduction by a speaker is added. 8.9 As the right and left headphone units (4), each
playback sound is independently transmitted to the right and left ears of the listener. 10 to 13
are delay circuits, and the delay circuit 16 is inserted between the input terminal 7 and the
headphone unit 9 between the delay circuit 10 and the headphone unit 8, and the delay circuit A
path 11 is inserted between the input terminal 6 and the headphone unit 9, and a delay # 1 d 1
path 12 is inserted between the input terminal 7 and the headphone unit 8. The delay circuits 10
and 13 have a delay time corresponding to the above-mentioned time T1, and the delay circuit
11.12 has a delay time corresponding to the above-mentioned time T2. Therefore, the right
channel signal is reproduced not only by the right headphone unit 8 but also by the left
headphone unit 9 with a time difference ?T, and the left channel signal is similarly reproduced
by the right headphone. The unit 8 is also reproduced with a time difference of four. As a result,
09-05-2019
2
despite the use of the headphone, the user feels like (5) similar to the case of using the speaker. .
As a means for giving a delay time, an acoustic delay means using a delay circuit C, an acoustic
tube, a means using magnetic tape, a magnetic disk, etc. can be used, and an analog delay circuit
or digital can be used. To give a delay circuit 111111 ? ? c kill, a delay time T, an acoustic tube
with a length of 20 ell was used, an acoustic tube with a length of 628.5 CM was used to give the
same T2, and the time difference ?T was 250 microseconds. By the way, a clear and natural
sense of direction completely different from the book by Hendhorn and the company by the
conventional Hendhorn is obtained, and there is no argument that the book will arise in the head.
An example is shown, and 14 to 17 are input terminals, and 20 to 27 are delay circuits. If there
are delay circuits having the same delay time among the delay circuits 20 to 27, they may be
integrated into one and used together. The listener (not necessary for C, since it is not an
absolute delay time but a time difference, the delay time of the delay circuit which is the
minimum delay time (6) is zero, ie, the delay circuit For the sake of
The delay time of the dredging circuit may be reduced accordingly. It is also known that the
frequency characteristic of the sound pressure generated in both ears contributes to the sense of
direction of the sound. When the sound source is in the direction of an angle from the front of
the listener, the sound pressure of the high frequency band of the sound source increases by L
and the sound pressure of the high frequency band of the other side drops by the same angle by
the head. That is, a difference occurs in the frequency characteristics (sound quality) of sounds
heard by the left and right ears. This is also confirmed by the fictional. If this is used in reverse
and sound quality differences are given to sounds reaching both ears, sense of sound will be
generated. The same is considered to occur also in the case of a two-channel, one-room stereosick bull with a scarer shown in Fig. 1. That is, among the sounds emitted from the right shoe and
the car 1, the frequency characteristics of the sound transmission line that reaches directly
through the right ear 4 is F1 and the tone emitted from the right stripe car 1 directly 'ear 5 Of
the acoustic transmission line until it reaches F, (7) Frequency characteristic F, which attenuates
in the crystal region more than F1. Speaker 2 is disposed symmetrically to the right speaker 1
Then, the acoustic transmission systems of the right ear 4 and the left ear 5 have the frequency
characteristics F2 and F, respectively. In the case of using Hendhorn, since the phenomenon does
not occur as described above, it is considered that it contributes to a sense of discord. Therefore,
it is necessary to carry out the action to be substituted for this phenomenon in the signal
transmission cloisonne, and this is an island with two members ? IL, and the figure in Fig. 14 is
an example. 52 to 35 are sound quality correction circuits. The terminals of the sound quality
correction circuits 32 and 33 are connected to the input terminal 6 of the right channel, and the
edge of the sound quality correction circuits 34 and 35 is input to the input terminal 7 of the left
channel. The output terminal of the sound quality correction circuit 32.34 is in the form of a
right, and the output terminal of the sound quality correction circuit 33.35 is the left headphone
unit 9 respectively. g ? 2 ░ characteristic of the frequency of the sound quality correction
circuit 32. 35, as shown by the curve a in the jP5 chart, high (8)! In order to emphasize the
09-05-2019
3
region, the frequency characteristic of the tone correction circuit 1vI 36.34 is to attenuate the
high region as shown in the curve mb of FIG. When configured as -H below, the reproduced
sound is more natural than it can be compared with the conventional headphone, and the same
excellent sense of direction as above is produced when the speaker is used, especially It has been
confirmed that the effect is high for highs. Fang 6 shows an example in the case where the
human power signal is multi-channel, and delay circuits 20 to 27 for adding the time difference
shown in Fig. 6 are additionally provided.
Reference numerals 42 to 49 denote sound quality correction circuits. The tone correction
circuits 42 to 49 and the delay circuits 20 to 27 can be interchanged even if the order is
changed. As described above, the combination of the tone quality correction circuit and the delay
circuit was tested on a 2-channel stereo book cow, and it became more natural than the
individual cases alone, and the sense of direction was also clear. The remarkable effect was
shown especially to the direction of-just beside (9) L. The difference between the reproduction 3
by the speaker and the reproduction by the headphone 3 is that the former has indirect sound
generated in the space (room) where the listener is present, whereas the latter has the absence of
the 1 generation. 7. When using a beaker, the sound image is on the shell and sounds at the
position of the speaker. However, in the case of using a headphone, the sound image has a
difference in the sense of separation such as near the head of the listener. The six major factors
are the presence or absence of indirect sound generated in the space where the listener is
present. Therefore, in the space where the listener is present, adding an indirect sound similar to
that generated when using a speaker can realize this idea, which can approach the state when
using a speaker even when using a headphone. That is, 562 in the circuit shown in FIG. 7 is a
mixing circuit, which produces an output of the sum of the signals of the left and right channels
applied from the input terminals 6 and 7. Reference numeral 63 denotes a circuit in the power
tank, which drives the reverberation adding device 64. 65 (to). The reverberation adding device
64. 65 is located in the space where the listener is present, and can obtain delay time and
reverberation time of the same dark as indirect sound that occurs in the case of using a speaker,
and it is a large hall in a small conventional room. It is different from what is used to Therefore,
while such a thing has a delay time of several milliseconds to several hundreds of milliseconds
and a reverberation time of several seconds to several seconds, this reverberation w64, 65 has an
M delay time of several milliseconds to IJ seconds. , Have a reverberation time of only a few
hundred milliseconds. The output of the reverberation adding device 64. 65 is applied to the
headphone units 8 and 9 via the interlocking volume 68. 69 together with the direct signals from
the J terminals 6 and 7). In the Japanese room 6 gl, the experiment was conducted with the
reverberation time of the reverberation adding device 64. 65 as about 9 milliseconds and the
reverberation time about 200 milliseconds. The effect is great, and the polyium 68. 69 is
properly adjusted. When the speaker is used, a sense of distance is heard from the white paper
when a speaker is used, and the sound does not come out of the headphone (11), but as if it is, it
gives a sense of reality as it actually appears in the room The
09-05-2019
4
Furthermore, by operating the volume 68.69, the level of the indirect sound was changed, and
the sense of distance of the sound image could be freely changed from near the head to a
distance as when using the speaker. It is conceivable that this indirect sound addition circuit is
used in combination with both of the late circuit described above and the sound quality
correction circuit. Here, 66.67 is an amplification circuit. Fig. 18 shows a side of a multi-channel
case where it is implemented. It is a 76-liter indirect sound addition circuit and 77-mass volume.
When the experiment shown in Fig. 18 was carried out in the case of two channels, it was
possible to obtain a clear and clear sound image of the sound image with and without the
speaker and with the speaker. In the former, the sound image is localized with respect to the
space, while the latter is localized with respect to the listener, as a difference between the player
4 in the reproduction and the headphone C ? yol reproduction. Human ears are on the left and
right sides of the cheek (1), and acoustically the same conditions are relatively equal except for
the shape of the auricle, and fixing the head leads to errors in determining the direction of the
sound source Is likely to occur. As a means to help this, if you turn your head and turn it to the
right, for example, if the sound image moves to the left with respect to the listener's head, it will
be judged that the sound fi is on the front, and it will move to the right. For example, it is judged
that it is behind. As described in the explanation of the delay circuit, the sound quality correction
circuit, and the P'19 sound addition circuit, when the headphone is used by setting the delay
time, the sound quality, and the indirect sound to appropriate values respectively. Also, since the
listener can freely create the sound image H04 and sense of distance for the listener, if the delay
time, the sound quality, and the indirect sound level are carbonized in response to the movement
of the listener's head, the listener can receive It is possible to give a sense of localization to the
space. Fang 9 figure shows a method for spatial localization of a sound image based on the above
idea, and it is possible to use a monophonic headphone. The example implemented is shown. An
input terminal of an 18-monaural signal, which is supplied to the indirect sound addition circuit
76 and the delay circuit 28.29. The M #, circuit 28 ░ 290 output is applied to the tone
correction circuit 30.31 and its output, along with the two outputs of the indirect sound addition
circuit 76, is applied to the headphone unit 8.9 respectively. The headphone unit 8.9 is fixed by
the holder 19 to the head of the listener 30 as shown in FIG. A shaft 50 is fixed to the holder 19
and a shaft 51 is connected via a universal joint 38.
The shaft 51 is connected to the shaft 52 via a spline 39 and is further connected to the shaft 41
via a universal joint 40. The axis 41 is an adjustment axis of the adjuster 57, and the adjuster 57
is fixed to the ceiling 56 of the room where the listener 3 is present, in the adjuster 37, the delay
circuits 28 and 29 and the sound quality correction circuit The cost element in 30.31 is IjvS, and
the delay time and the sound quality are changed in conjunction with the rotation of the shaft 41
(2). Therefore, the listener 3 makes his head When rotating around the vertical axis, the axis 41
rotates, and the delay time and the sound quality change. Fang 11 shows the relationship
09-05-2019
5
between the rotational angle of the head of the listener 3 and the delay circuit 28, 290 delay
time, and the characteristic of the delay circuit 29 for the left ear is a, b is the delay for the right
ear The characteristics of the circuit 28 are shown. If this is expressed by an equation, the delay
time TR of the delay circuit 28 and the delay time TL of the delay circuit 29 are represented by
? (radian) with the rotation angle of the 30 listeners facing the right as positive. T = A-sin ? CTL
= A + sin ?. C fixed t! A (seconds) is a sixth element that prevents the realization of an
unrealizable negative delay time, and naturally, A> soil. The time difference ?? obtained by the
2C both delay circuits 28 and 29 is (b) ?T = TLTH??! This becomes the theoretical value of the
above-mentioned C. As a concrete means for changing the continuous time TR + TL, for example,
it is conceivable to attach a cam to the front two wheels 41 and move the position of the
reproducing head of the delay device using a magnetic tape between the tape running directions.
The sound quality correction circuits 30, 31 are arranged so as to continuously change between
the characteristic surfaces 11a + b shown in FIG. 12 according to the rotation of the shaft 41.
When 50 listeners face the front, the characteristics of the picture sound quality correction
circuit 30.51 are both flat as shown by the four-line C, but sound quality is reversed by rotating
? / 2 radians clockwise. The characteristic of the correction circuit 30 is curved, and the
characteristic of the sound quality supplement iElol path 51 is changed to the curve ?.
Conversely, when rotated in reverse, the characteristic of the sound quality correction circuit 50
changes to the curve ?, and the characteristic of the sound quality correction circuit 61 changes
to the curve bK. It becomes an intermediate characteristic between six. As a specific means for
this, like the general tone core (2)) tone roll circuit, the tone quality correction circuit SO. It is
conceivable to change the circuit constant in 61 differentially by the axis 41. According to the
method configured as described below, for the reason described in the explanation of the delay
circuit and the sound quality correction circuit, the sound squeezing of the listener 5 against the
head of the listener 3 is 56 for the rotation of the head of the listener 5 2 Rotate in the opposite
direction, and after all, it feels like it is localized to space.
In the circuit shown in FIG. 8, the characteristics of the delay circuits 20 to 27 and the sound
quality correction circuits 42 to 49 change in accordance with the rotation of the listener's W in
the circuit shown in FIG. Configure to When this system is not tested for S-channel reproduction
in 2-channel stereo reproduction, the effect is great, and a clear sense of localization for the
acoustic space is obtained, and the naturalness is reproduced using a speaker in the room It's
almost indistinguishable from time. Note that although only the rotation around the vertical axis
of the listener's head has been described here, the listener can also use the same method for
moving the head in all directions. It is possible to obtain a sense of localization for the space in
which it is located. In addition, there is no problem for practical use-L in the case where the
operation according to the head movement of the listener is not performed or only the head
rotation movement is targeted for the li frontal addition circuit. However, if you consider the
movement of the head, it adjusts the level of indirect sound and controls the sense of distance in
the above description! It is urgent that l-r. Furthermore, the device for detecting the head's head
09-05-2019
6
of the listener has shown a mechanical one, which fixes a specific light beam at a point in the
space where the listener is located, and how the light is incident on the head of the listener A
device for detecting the distance may be provided, or a magnetic field in a specific direction may
be provided in the space, and a device for detecting the direction of the magnetic field may be
provided on the head of the listener, or 'd! A device such as providing a gyro on the head of a
listening piece can be used. As for -t = l +, the delay circuit and the sound quality complement 2
condi circuit 5 positive circuit are mixed as shown in-H below, and the signals of each channel
are mixed and added to both units of the headphone, and further (2) Indirect sound addition
circuit tube is provided to add indirect sound and control the characteristics of each circuit
according to the movement of the head of the listener. [Method] E1] A sense of stereochemistry,
a sense of stereotaxy, a sense of realism, and a sense of reality can be obtained, so that it is
possible to judge whether it is a so-called 2-2 system 4-channel stereo sound image by the
headphone. And, even without providing all of the control by the movement of each circuit and
the listener, a single effect can be obtained independently.
09-05-2019
7
Документ
Категория
Без категории
Просмотров
0
Размер файла
20 Кб
Теги
jps5397601
1/--страниц
Пожаловаться на содержимое документа