close

Вход

Забыли?

вход по аккаунту

?

JPS4942925

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 JPS4942925
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a four-directional
directional microphone from which a lid plate for sealing an acoustic chamber is taken out, FIG. 2
is a diagram equivalent to the vibration system of FIG. Fig. 1 is a vibration system equivalent
circuit diagram of a microphone in which the microphone is a ribbon type, Fig. 4 is a directivity
frequency characteristic diagram of Fig. 3, and Fig. 5 is four according to the present invention
FIG. 18 is a cross-sectional view of a self-polarizing capacitor microphone having a diaphragm of
6 is a longitudinal sectional view of FIG. 1 is a cross-sectional partial exploded view of FIG. 5, FIG.
8 is a vibration system equivalent circuit diagram of the FIG. 5 microphone, FIG. 9 is a directional
frequency characteristic diagram of the FIG. 5 microphone, and FIG. It is a thing showing the
output voltage directivity frequency characteristic figure of a microphone. 1
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Out
terminal of an acoustic tube 9 -65 Jou 49-42925 C2) Three-scissors 2 Ro leather 62l-66-J-sho
49-42925 <3) Rrr r Figure 1 67 Ju J-sho 49-42925 (4 J s! Oo + S, one-sided) 906 one-by-one),
one-on-one) one 1. / и '' N / '' / 1 '\ 1 O-20? ?? ???? ??? ?? 4681 ? | One-one ? +
6110 ? ?? ?? ?, 2-C (+-+ O (z = 3-C (l-'i-CX z = 4 7B-mouth% = 2 N ?10-10 \ \ \ \ \ \ \ \ \ \
\ \ \ [? What,\\. 7 \ \ 7 7 1 1 \ 'Z и ? 1iIQ 642 68 12 8 15 + eso и CO 2 ? izero, ttg @ ? 2 ?,
09? ? ? CC + 2 cy (,: 0. rSbv. 9 Figure-68 real opening 49-42 25 5 (5) 20 o 0 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 ^ r 5 1 r 1 one~. 1 11 1 1 1 1 1 1 1 1 1 %% ', 1 fV f 1 1, 1 \ \ / 411), \ 1 M 7'
(no "10- 20-302 cattle 6 glQo @ tQOo 62 ? = section Hz now Takson 10 figure 69
DETAILED DESCRIPTION OF THE INVENTION In the present invention, four self-polarizing
diaphragms of equal converted mechanical impedance are provided in each of four blood vessels
of an insulator exhibiting an angle difference of about 90 degrees in the same plane. Installed at
the open end of the chamber, connecting each chamber with an acoustic tube and providing an
acoustic resistor at the junction between the chamber and the acoustic tube. In order to perform
tM, J (4jll child vs. acoustic circuit's sound in 1 943 direction directivity self-defined Ikm
10-05-2019
1
condenser microon 11 CZ f appropriately determined one dance, 4 direction directional
microphone generally like Figure 1 In the configuration shown in the figure, a symbol is a
diaphragm, and a symbol B is a box including a four-terminal pair acoustic circuit. Generally, the
vibration system equivalent circuit of the microphone of FIG. 1 is shown as in FIG. Here, C is a
four-terminal acoustic circuit, 20 is an equivalent mechanical impedance of a diaphragm, Fl и F 2 и
IP 5 и F 4 is an excitation force due to the sound pressure applied to each diaphragm, v, и v и и v и и
The velocity of the diaphragm, a, indicates the effective distance from the origin of the 4-terminal
pair acoustic circuit (four vibration, medium space surrounded by the moving plate) and the
dropping of the feces to each sound * tf terminal. There are ribbon type, dynamic type, capacitor
type, etc. as the acoustoelectric conversion mechanism of the four directional directional
microphone, but in the case of ribbon type, one equivalent system of vibration system is as
shown in Fig. 1 and Fig. 2) Indicated. Focusing on one ribbon, a value proportional to the output
voltage when a sound wave from a distance in the (#, ?) direction is incident on the ribbon is
obtained. 1t 1 ?[f (2 C C 05 CL 05 SD SD 05 05 05 05 05 05 05 05 05 05 65 65 65 65 + + + +
+ + + + cos cos cos cos cos cos x co (Xsumocos + J] 4- + g "IC '$ 7 d, x (+-a, Ill-'---(1) However,-,heat, heat, r--@, a-(1) 1 here V, vibrational velocity of ribbon, ?. Striking force due to sound
pressure applied to ribbons, r, ... one-society labyrinth house resistance resistance and equivalent
stainness, town equivalent ribbon amount of ribbon * / 'j ? Positive Output of the above ribbon
is unidirectional. The conditions for showing are as shown in Fig. 4 (a, showing the pointing
frequency characteristics when deducting ? as 4))> Town Mi 4 * 1 1 12 s + = 2. Further, since
the output OX power number characteristic of the upper range limit line xax-1 to l) th2 "is
obtained, the size of a is opened. That is, in order for the output of each ribbon to have the same
sensitivity and to have a common ribbon microphone and 1iIJ power OIa degree, a common
ribbon microphone-phone 4 + #! Since it is necessary to use magnetic material having the above
volume, the shape is large and it is impossible to take the high range limit near the limit of the
flexible fiber due to the peripheral liquid number characteristic, and 69.4 channel stereo
collection 9 O If O sound image is also unclear.
In addition, the same applies to the case where a 4-way directional microphone is constructed by
looking at the Guinak-shaped sound feeding system, and it is necessary to use a magnetic
material having a volume four or more times that of the collection dynatac microphone. And the
distance of a can not be reduced, and the magnetic circuit ringing sound circuit is also
complicated, and it is difficult to realize it because the shape is tedious. Since the capacitor type
can basically constitute the microphone only with the diaphragm and the identification electrode,
it is possible to obtain good frequency characteristics and sensitivity with a simple structure, with
almost no difference in shape on the shape. It is considered to be optimum as the sound-toelectricity conversion Ilk structure of the four directional directional microphone. [However, DC
bias supply type requires a DC power supply circuit to apply a DC voltage of about Ktsov
between the diaphragm and the back electrode, and the output terminal has a high resistance of
several tens to several hundreds of M? at four. It is necessary to realize that there is a need to
10-05-2019
2
continue to cause noise reduction due to problems such as insulation and stray capacitance, and
the mixing between the four outputs. In view of the above-mentioned point, the present invention
has a four-directional directional microphone composed of a self-polarizing capacitor type soundto-electric conversion mechanism using a self-polarizing polymer film, and each output from each
diaphragm is single. The acoustic impedance of the 4 terminal pair 4 series is appropriately
determined so as to have directivity and t'4 ? 45. An embodiment of the present invention will
be described below with reference to the drawings. As shown in FIG. 5, FIG. 6 and FIG. 7, 1a
insulation и 21 и 22 и 23 и 24 are insulators 10 vacancies, 5 ', 32 @ 35 ░ 34 #i self-propelling
polymer film The diaphragms 41, 42, 45, 44 are diaphragm 30 tension rings, 51, 52, 53, 54 #i
back electrodes, 61, 62, 63, 64 are acoustic resistors 71.72 degrees 7 ', Reference numeral 7
'denotes a back cavity of the back electrode 5, 8 denotes an acoustic tube connecting the
respective cavities 2, and 91 and 92 denote output terminals. The vibration system equivalent
circuit of the microphone of FIG. 5 is shown in FIG. Here, llo-8 o is equivalent to the diaphragm
30 equivalent stiffness and equivalent stiffness, r6 is a thin fluid layer O equivalent resistance
between the diaphragm 1 and the back electrode 5 0 m 2 и r 2 is connected i ? 80 equivalent
mass and acoustic resistor 60 equivalent resistance + 81 is back pole 50 back surface space 70
equivalent stiffness, F, F 2 и 5.1 5. 14 is vibration [1 # c excitation force by sound pressure
applied, и и v 2 ? ? ?S v 4 is diaphragm 1 Speed. The value proportional to the output voltage
of the diaphragm 1 is expressed as follows. 6 people? , Baku U ((1 medium plaster)-non (if 76
information-if и ? и middle 3 ? ? xt: pa) (O 5 (? S1 information ? mcosp-cos ? sine mtp) + (-x
2 ci + (++ (x?
4) + 1'2CX-'rz (pz + &) Jxsit + 1 X x iv + ?C05q3) J [(x и zg, (++ 4 + j) piece Xl 2d, Q' 2 (?, in, l ',
Jx cos (x 5 tnecostp) + F 2 + ? v)-x2. : Z (ct: a + ax in a, p, 4? ) -1-X) w2cx: F3JJ51-n (x5tne
(ostp5JJxf (-; C + do;)-x "f-7-+-a; '(++ # z ten-hand) э ?2 (1--6) 1 + ? 2 + ylid c c xx (+ ? 2 ? ?
?-? ? X (1 m "2 J))-? 6 x: p-'J + J (? 1 ? 10 ? (l ten temples) ((51 ? ?-f Possible 135 ? +
?1?2 (one dimension 2? to f power sigma ?, ? (l + 25. ? i ?, ? ((2 2? 2-? ?1? -1---(z))
where ball = r, right-soul,-\ knee 2. 2. ▒ э-ty H ,. ?? ??э???????? Therefore, the
uni-directional # -sensitivity is h >> 1?-1 ?C. Y-,----c ') + (<+ (3,-y ", pJ), calculation results while
changing r, eJ2m / 2 while satisfying the condition of single directivity 9, the conditions of the
respective impedance elements ? / nJ # shown in FIG. 9 are r, ? 50. a, m 4 ? ? 2 ? 4, g, mu
201, a 2 m (1118 is optimal). As shown in FIG. 9, it was found that a value of 2 m ^ 1.53 is
optimum at the upper limit of the frequency characteristic of the output of the system. An output
frequency characteristic of one diaphragm O of the 4-directional self-polarizing capacitor
microphone having the structure of FIG. 5 manufactured based on the conditions of the upper
strap is shown at 101 kK. w, the measurement results in Fig. 10 were quick to the calculation
results in Fig. 9, and it was possible to extend the high range limit of the frequency
characteristics to near the possible limit. As described above, it can be said that the fourdirectional self-polarizing condenser microphone having the structure shown in FIG. 5 is
optimum as a four-force directional microphone, and the practical value O is large.
10-05-2019
3
10-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
13 Кб
Теги
jps4942925
1/--страниц
Пожаловаться на содержимое документа