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JPS5217001

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DESCRIPTION JPS5217001
Patent application C 'on July 9, 9 長官 of the Patent Office President Hideo Saito 4 agent bow
16011 locations Nishi Shinjuku Shinjuku-ku Tokyo Tokyo lTl-18 17. ・ Shinjuku ・ ・ ・ ・-1 'I
已 I bow 1 at night 0: 3 · 343-5821. [Ano], [Phase] Japan Patent Office 0 JP-A-52- 17 0010,
published JP-A-52. (1977) 2.8 Internal Serial Number Description of the Invention Name of the
Invention The Pseudo-Head Having a buttock located at least l'di] g 111 on the rear edge of the
head. In front of the shoulder part is a pseudo-head that is provided with a hook means to spare
a pair of left and right microphones
% A false bright body that is formed in the middle high toward the end of the claim of the
demand.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a simulated head
used when performing binaural sound pickup (pinaural sound pickup). Conventionally, as a
stereo microphone device that performs binaural sound collection, microphone units are
attached to both ends of an arc-shaped elastic pipe respectively, and projections for inserting the
external ear canal are accommodated in the -S microphone unit respectively. When the coat was
pulled out from the center of the pipe, the 41ii stethoscope type is wholesale, but this 裟 It is
attached to the 1M contact person's ear and taken away, so it takes a long time to collect sound If
you withdraw. It is painful to keep the device in the track 44, and if the sentence head is moved
too much, there is a disadvantage that unnatural sound is collected. Therefore, the present
invention is intended to propose a pseudo-head capable of binaural sound pickup in the same
manner as in the case of direct sound collection by the human ear in order to eliminate such a
defect. Embodiments of the present invention will be described below with reference to the
drawings. In FIG. 1, fi + represents a pseudo head body and is formed in a single-headed conical
shape n, and a ridge portion (2) having a diameter larger than the rear outside diameter is
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formed at the rear edge. On both sides in front of the buttocks (2), there is provided a throat
attachment means (41t4 +) in which a single phantom microphone [31 + 31 loses in the left-right
symmetry. In the case of this example, although the rib portion (2) is provided on the entire back
edge of the pseudo head main body ill, the sound attenuating material (5) such as rubber on the
front surface at least on both sides 2 and 3 and 4 and 5 show a modification of the embodiment
shown in FIG. 1, and the embodiment of FIGS. 2 and 3 is carried out. In the example, the pseudo
head body +1. 1 is a closed end, the tapered end member EndPage: 1 (la), * 1 part is a tapered
cylindrical intermediate member (1 b) having a diameter smaller than the rear opening diameter
of the end member (1 a) and the front A tapered cylindrical rear member (IC) whose diameter is
smaller than the diameter of the middle portion @ '(lb) is telescopically connected in an
expandable manner. On the rear face of this pseudo-class main body (1), a disk (6) with a
diameter larger than the rear outer diameter is fixed on the rear face of the rear member (IC) as
well. An outer peripheral surface portion protruding from the river surface of the rear member
(IC) is a shiver portion 12), and an acoustic damping material (5) is attached to the front surface
thereof. · A pair of arm pieces + 71 + 71 are pivoted at the center of the frequent / curved part of
the disc 16) t1 Both arm pieces (the tip of the 7H 71 is folded forward of the disc (610 front side,
dark negative part '2) Curved piece-mounting means f4 ++ 41 of microphone + 31 131 is
provided on the bent end face (7a) (7a).
By rotating both arm pieces + 71 + 71, it is possible to shift the position of the microphone f3 +
131, which is approximately the pseudo-class main body (1), from the horizontal direction in the
vertical direction by an arbitrary angle. Further, in this example, when the pseudo class is not in
use U, the tip end member (1a) is embedded in the intermediate member (1b) and the
intermediate member (1b) is embedded in the rear member (IC). Pseudo-class body (11 can be
reduced and carried etc. In the variant shown in FIGS. 4 and 5, the pseudo-class body (1) is
formed to be able to expand in a conical shape A balloon-like hollow body (8) is formed. On the
rear face of this pseudo-class body (1), also on the rear face of the hollow body · 8), a disc (9)
larger in diameter than this rear outer diameter is obscured and protrudes from the aspect of the
hollow body (8) The air blowing port tube qI of the hollow body (8) is on the rear surface of the 0
disk (9) whose sound attenuating material (5) is attached to the front surface of the outer surface
portion as a ridge 12). The guide hole flIJfl11 of circular arc shape is provided on the outer
peripheral surface of the outer peripheral surface portion along the rear side edge of the hollow
body 18) in a symmetrical manner, and the guide hole fl11 (from Ill). The tip end of a pair of arm
pieces u21ff3 pivoted t ′ ′ to the center of the rear face is bent f and projected to the lit face
side n, its projecting end face (12a) (12 m) K-q eye crophone! 31 + 31 mounting means (4) + 41
is provided, and by rotating one arm piece a ′; aa ′ a along the guide hole 0 K till K, the
position of the microphone 31 [31 (31 from the horizontal direction to the pseudo analog 俸 I1 +
In one example which can be shifted up and down by an arbitrary angle, when the pseudo class is
not used, the rod (131 removed from the hollow body (8) fitted in the air blowing port% 'QO1 of
the hollow body (8) is removed The hollow body (8) is crushed by releasing the air in (8) and can
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be reduced to the disc (9) in the form of polymerization 1 to flat. In each of the above-described
embodiments, when 1; Jp 121 is formed of δ 臀 attenuating material such as rubber, it is not
necessary to attach the acoustic attenuating material (5) to the front surface. Next, an audition
comparison experiment will be described regarding the localization of the sound image in the
case where the pseudo-kind according to the present invention configured as described above
and the case where a human eyelid is used. As the pseudo-classes used, the human head for
comparison is 6 types by combining with the size of the pseudo solo body (11 length I (100,
150.200'ms and buttocks 12) or 24 (combined with L260iam) Use two kinds of male M and
female W. Also, use a drum as sound l and water four times about every 1 second, select 12
directions of 30 directions and 7 directions of the sound source for the sound source, and select
each false head of each artificial head from each direction With the right and left microphones
attached, the IIX effect is recorded on a zero-tone magnetic tape.
In addition, with a resemblance, the length H is 100 m and the diameter of i @ 5121 is fixed at
240 mFC in the fast response main body Lll (7), and the microphones 31 (the position of 31 is
horizontal In the case of shifting, recording is performed on the sound source in the manner
described above and # 4. While listening to the movement of the playback sound while thinking
that the subject is listening to the subject by headphones, and listening to the movement of the
playback sound, let's say "what time Fill in the answer data sheet. Reproduction of all recordings
After listening and comparing the data sheet with the actual recording position, the data is
superior for the following experimental investigations. As the experimental items, (8) correct
answer rate; the rate (唸) at which the direction of the sound source is correctly determined; (F3)
Unnatural neck 1 The dusting rate of elephants is a certain level unknown sound, the ratio of the
appearance of the unnatural sound I that you hear from the top of the f1 circle that comes into
contact with the back of the rabbit 1 II (%) (Error 441 fixed rate of C1 punishment withdrawal;
rate C% that made a full judgment on the line connecting both ears) (For example, 1 o'clock and 5
o'clock, 10 o'clock and 8 o'clock when assuming the front as 12 o'clock) However, an error of ±
30 'or less shall be observed. EndPage: Three items of 2. The results shown in the charts A, B and
C of FIG. 6 are obtained for the mean values and standard deviations of the above experimental
items, respectively. The performance of sound collection with a human head is actually better
than that of the pseudotype, but the pseudotype main body (1) among the pseudotypes has a
length H of 200 m and the hip section (2) There is almost no difference between books with a
diameter of 240 and those using a human head. Next, Fig. 7 shows two types of sound-collection
results that are good in human head and pseudo-like, li! It is the relationship between the sound
source direction and the subject's indication direction for two types of ith body like (1) length H
and buttocks (2) diameter 200 and 24 θm and 150 and 240 g ' (Al: when a human head is used,
(Bl: when a pseudo-class is used, the horizontal axis represents the actual sound source direction,
and the vertical axis represents the subject's indication direction. 0) is directly on the front. The
45 ° direction line from the origin (θ °) becomes the correct answer reference line a, and the
orthogonal lines at the 90 ° and 270 ° points of the correct answer reference line a become
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the front and rear branch constant line (b). In the case of “n”, the instruction state of sound
collection in the human head and the pseudo-class shows the same tendency, and allows the
indication error of ± 30 ° from the correct answer criterion #la and the front / back error
judgment criterion line. It can be seen that most of them fall within the correct answer area and
the front / back error judgment area. Also for the sound source in the horizontal direction. There
is a high possibility of being judged just beside (90 ', 270').
It can be seen that it is extremely rare that the sound source after pf right after (tso ') is
misjudged as front (0), and the probability that the sound source for front (0) is falsely judged as
right after (180') is false. In addition, although the pseudo | simulation class main body in each
above-mentioned Example is formed in the shape of a cone on a head, although the abovementioned result is obtained even if it forms in hemispherical shape etc. inside-and-top shape.
When the pseudo-one body is formed in a conical shape as in the embodiment, there is an
advantage that the setting of the diagram can be accurately applied. As described above,
according to the present invention, a sound collecting effect similar to that in the case of picking
up both ears using a human head is obtained by a pseudo-class having a simple configuration
combining a high-practice dummy piece main body and a hip portion. n, M is sufficiently
practical and does not move unnecessarily unlike the human head, so it can be picked up in a
stable manner for a long time, and it is possible to pick up natural sounds.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan perspective view of an embodiment of
the present invention, FIG. 2 is a cross-sectional plan view of another embodiment of the present
invention, and FIG. 3 is a front view taken along line 1-1 of FIG. Fig. 4 is a cross-sectional plan
view of another embodiment of the present invention, Fig. 5 is a rear view taken along the line-of
Fig. 4, and Figs. 6 and 7 are tables for explaining the present invention. is there. In the figure, (1)
is a pseudo-class main body, (2) is a collar, + 31 + 31 is a microphone, + 41 + 41Fi attachment
means, and (5) is an acoustic attenuation material. '+' :, 'j, r'11': 'FIG. 1 EndPage: 3 FIG. 2' I FIG. 5
EndPage: 4
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