close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPS56111589

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 JPS56111589
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a variable directional
microphone previously proposed by the present applicant, and FIGS. 2 and 3 are quadruple
variable resistors used in the microphone shown in FIG. Resistance change characteristic
diagram, FIG. 4 is a frequency characteristic diagram of 0 ░ direction and 90 ░ direction
obtained by the circuit shown in FIG. 1, FIG. 5 is a circuit diagram of one embodiment of the
variable directional microphone according to the present invention is there. 1a to 1c:
microphone, 2: sound source, 4 ?: frequency characteristic correction circuit, 5: output terminal,
6 ?: bypass filter, VH2, VH2: 2 stations with center tap Variable resistor, C ?, c, C5: capacitor,
R6-R9: resistor.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a variable
directional microphone, which is a small size and a circuit using a double tap variable resistor
with a center tap as a variable resistor capable of changing directivity, frequency characteristics
and mixed output level. It is an object of the present invention to provide a microphone which
can be easily configured. The present customer has previously made Japanese Patent Application
No. 54-51691 entitled "Variable finger (2) three primary sound pressure tilt single-n curvatures
(hereinafter referred to as primary single directivity) The microphone [] phone of the sex) [two]
forward with respect to the volume, combining one one forward and backward to mix the output
of the piping system and the microphone of the straw respectively and mix the ratio of the
specified amount Variable directivity can be varied from no directivity to primary single
directivity, secondary sound pressure single-directivity (hereinafter referred to as secondary
single directivity), as well as variable directivity. The microphone 841 configured to change the
volume accordingly. Planned. Two conventional I-1,1 first-order directional microphones are
opposed to each other to change the mixing ratio of the microphone output to obtain directivity
from omnidirectionality to unidirectionality or bidirectionality as a conventional one In
comparison, a wide range of directivity is possible! Sound volume zooming with a sufficient sense
10-04-2019
1
of distance. On the other hand, the applicant applied a bypass filter to one primary unidirectional
microphone placed forward with respect to the sound source by the Japanese Patent Application
Publication No. 54-145357 "f-directional microphone a phone". Connect the outputs to the
outputs of the other microphones in reverse phase, and mix the mH (3) to make the directivity
changeable. This can prevent the loss of the level especially at a low level compared to the
conventional FIRQ number characteristic, and can reduce the loss amount of the equalizer with
LL. FIG. 1 shows the same sketch combining the two "town line directional microphones" of the
above draft. In the figure, the microphones la and lb are directed forward to the sound source 2I,
and the microphone lc is directed V * to the sound source 2. VR, ~ VR4 are four sets of edible
resistors, nondirectional when each slider is at terminal ?, primary unidirectivity when it is at
terminal ?, when it is at terminal ? The variable resistance 6V) according to the displacement
from the terminal ? to the terminal (]>) m end which can obtain secondary uni-directionality! , Is
configured to increase the output level, the resistance between the terminal ? and the slider is as
shown in FIG. 2 with variable resistors VR2 and VR3 and the town! As shown in FIG. 3, the
resistors VR,.
Here, when obtaining non-directionality, variable resistor VR. (4) =, when the slider of VB2 is
closed at 1000, the outputs of the microphones la and lc are added at the same level via the
amplifiers 113a and 3c, respectively, lI! The output terminal 5 is extracted via the wave number
characteristic correction circuit 4). In order to obtain primary uni-directionality, when the slider
of variable resistor VR, ~ XrFL is connected to terminal ?, the output of microphone lc is
attenuated and only the output of microphone la amplifier 311, frequency characteristics
Variable resistance 11v) t when taken out via @ 4 and obtaining second order uni-directionality.
When the slider of ~ VR4 is connected to the ladder ?, the outputs of the microphones la and Ib
are added at the same level via the amplifiers 3a, 3b and 3b ', respectively, and the output level is
increased at the variable resistor vR3 and The frequency characteristic is corrected by the
frequency characteristic correction circuit 4 and taken out. At this time, the cutoff frequency of
the high-pass filter 2 composed of the capacitor C1 and the variable resistor 1 is 100 Hz, the
distance between the microphones la and lb is 3D, the microphones la to lc and the sound source
2 The frequency characteristic diagram when the angle to be made is 0 ░ and 90 ░ is as shown
in FIG. 4, and the response decreases as in the prior art particularly in the low frequency range
and the medium (5) mis number. For this purpose, the frequency characteristic correction circuit
4 is capable of correcting 13 dBlj 1 degree by 1 / (1 more than 1 degree 0 degree) as a
correction factor, and the correction amount is smaller than that of the conventional one. It is an
end t thing. However, this is a special variable resistor VR, VH2 for changing directivity
characteristics, a variable resistor v for changing output L and bell, and a FIJ variable resistance
6vR4 for correcting frequency characteristics. It has to be used in a series of four (4) series with
various resistance change characteristics, and for this reason it can be small and inexpensive to
construct, the father, requires a large torque to llk it, and the circuit There is a 11.5 while it can
not be configured easily. The present invention solves the above-mentioned shoulder point, and
10-04-2019
2
an embodiment shown in FIG. 5 will be described below. FIG. 5 shows a circuit diagram of an
embodiment of the variable directional microphone according to the present invention, in which
the same figure and the same reference numeral as in FIG. 1 and the same part 4 'are attached. In
the figure, ? and l 6 are two series of variable resistors with center taps, and the terminal ? of
the variable resistor ? is via the capacitor C1) 6) and is equally reversed by the phase inverting
amplifier 3b ' Terminal C is grounded with the center tap, and A-core r1 is amplified i!
Connected to 3c. Between the terminal t of the f resistor and the terminal t 6 of the center tap
and the terminal of the center tap t between the frequency and the terminal of the center tap l
This is a capacitor 04 + for correcting the frequency #I K ? 3 s, resistance Rs + Re is closed, 1 I ''
3) l through amplifier R2 08Il of amplifier 4a! The child is at W # length h and is at a desk
grounded via resistor R6. ??? и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и 6 Unidirectionality, i-half-1 ? ?])) ? To obtain a second
order unidirectionality when turning two, S ?-и Slider from terminal ? ? to terminal ? ? ?The output level is configured to be increased by r C ?and thus the variable resistor V ?) L.
Here, when obtaining non-directionality, [1 single change resistor-. Connect the VR, slider to
terminal ?. As a result, the output of the microphone 1c is maximized at the end and the output
of the microphone lb is minimized and mixed with the output of the microphone 1a and taken
from the output terminal 5 via the frequency correction path 4 '. In this case, 1) "Den" "Ca + Cs,
abrasive piles, # 1 wave teaching (7)") characteristic correction circuit 4. The circuit consisting of
R9 is a slider 1 of the variable resistor VR, and has a # 1 margin, and the frequency characteristic
of the flA% number characteristic correction circuit 4 'is flat. Variable resistor ?, when obtaining
primary uni-directionality. (6) Connect the slider of 6 to forceps 0. As a result, the four
microphones lc and lb are both ?-spun via the center tap of the variable resistor Rs, so that none
of them is taken from the slider, and only the output of the microphone 1m is corrected for the
frequency characteristics It is taken out from the output terminal 5 through l ? 4 '. At this time,
since the circuit for changing the frequency characteristic of the frequency a% property
correction IcJ path 4 'is short-circuited by the slider 1 as in the above case, the frequency
characteristic is flat. When the slider is displaced from the terminal 1 to the terminal 2, the
output of the microphone 1c gradually decreases due to the change in resistance value of the
variable resistor 3, so the directivity gradually goes to the primary unidirectivity Since the
feedback amount of the amplifier 4a is changed by the resistance value change of the variable
resistor VR, the microphone la. The mixed output level of lc gradually increases. (8) If you get a
second order unidirectionality, you can go to gc! ????? Connect the VR, slider to terminal
?. As a result, the output of the microphone IC and the output of the microphone lb are reversed
in phase before each other.
At this time, a bypass filter 6 'is constituted by the capacitor C1 and the variable resistor 2. The
10-04-2019
3
high frequency of the cutoff frequency of the filter 6' is equal to or less than the cutoff frequency.
At the same time, in order to achieve the same level of integration, the output of the microphone
la is limited to 1 at the low end tl number below the cut-off frequency. The following single
directivity can be obtained, and the cutoff rlAm = 'i, -'1o. The frequency characteristics in the case
of Hz are those of @ 1 and 1 for return. It is as shown in FIG. When the slider is displaced from
the terminal 0 to the terminal 3, the output level from the microphone 1b is slowly increased by
the variable resistor VR, and as a result, the marginal ratio of the microphones la and lb is small.
The g51 pH in the primary uni-directionality to the secondary (9) uni-directionality can be IITexpected into set 1 '. Also, when the slider is in the pipe position over the terminals, mosquitoes,
inner core, and so on, it is acceptable! A circuit connected between terminals 1 and 2 of the costeffective resistor v'R6, the mixed output level of the microphones 1 and 1 gradually becomes
large due to the resistance value change of the resistance FjlVR, In order to realize the impedance
of the U.S.A., the wave damage characteristic of the circuit 4 'for compensating the m number
characteristic is commercialized. In this case, since the single wave number characteristic of the
welding output of each ichonon is only 13 dB ? injection drop 'f7 in the star middle brilliance
frequency in FIG. C: no kn, +: ?иии ? ? ? ? 1 ? ? may have a characteristic inverse to the
characteristic of 41-6, and the correction amount may be small compared to the diameter 4; It
may be difficult to cause wind noise and so on. In the case of the old frequency rating 4 ?, the
resistance R6 ░ R, Q> the resistance value ? ? variable resistance KiVR6, the resistance (R, +1
(,) (7) much smaller than the resistance end, or Fixation of the capacitor C4 !, lt controller: The
capacitance value of l ? C3 is selected to be extremely small. In addition, the same wave number
characteristics at medium and high 8 wave numbers (10) are determined by the variable resistor
8, the resistor R8 ░ R9 and the capacitors C4 and C, and the variable resistor register 6 and the
resistors R to R9, Determine the IIIH number characteristics in the low range with capacitors C4,
C? ??? As described above, the variable directional microphone according to the present
invention connects both ends of the end resistors of the center tapped t12 series variable resistor
to the outputs of a pair of microphones disposed in front of each other in reverse. -A mixing
sleeve 11) for mixing the output from the slider and the output of the other microphone to a
slider of 10,000 resistors and other microphones other than the one pair is hardened. Since the
frequency characteristic correction circuit in which the other resistor of the dual variable resistor
is connected is connected to the path, two variable resistors for changing directivity, frequency
characteristics and mixed output level are used. Well, smaller and less expensive than quadruple
ones, and the rotating force is small, and the circuit can be configured easily, and the change
characteristic of resistance value is generally + IHI-like. It is easy to obtain because it can be used
Because it can prevent the loss of level in the low-frequency, especially due to the use of bypass
filter having obtained correcting amount of frequency correction circuit (11) into small, the
characteristics of Township capable of improving the 8N ratio.
10-04-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
14 Кб
Теги
description, jps56111589
1/--страниц
Пожаловаться на содержимое документа