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JPS5636210

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DESCRIPTION JPS5636210
Description 1, title of the invention
グラフィック・イコライザ
3. Detailed Description of the Invention The present invention relates to a graphic equalizer, in
which a signal extracted from the equalizer is generated as sound by a speaker, converted into an
electric signal Kf by a microphone, and then its frequency spectrum distribution is converted into
a single spectrum analyzer. It is an object of the present invention to provide a graph ink
equalizer which can easily display sound field correction and measure the frequency spectrum of
a sound source. The applicant previously proposed a graphic equalizer having a spectrum
analyzer in parallel, in Japanese Utility Model Application No. 53-114525. FIG. 1 shows a block
diagram of an example of the graph ink equalizer proposed by the present applicant. In the
figure, an acoustic signal that has entered the input terminal 1 is applied to the movable contact
of the changeover switch SW and the fixed contact a of the changeover switch SWb. The
aforementioned changeover switches 8Wa and SWb are switched in conjunction with each other
and connected to either of the contacts a and b. As shown, the changeover switch SW. Assuming
that SWb is connected to the contact a, the input acoustic signal is supplied to the spectrum
analyzer 2 while being guided to the output terminal 4. That is, the input acoustic signal is output
to the output terminal 4 at the same time as the frequency spectrum distribution is displayed for
each divided band by the spectrum analyzer 2. On the other hand, when the changeover switches
swa and swb are connected to the contact point, the input acoustic signal is applied to the
equalizer 3 through the changeover switch SW, where it is subjected to level adjustment
according to its divided band as necessary, and then the output terminal 4 is processed and
output On the other hand, the frequency spectrum distribution of the acoustic signal supplied to
the spectrum analyzer 2 and adjusted in level by the equalizer 3 is displayed. The equalizer 3 is a
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circuit that independently boosts or attenuates the input signal independently for each of a
plurality of divided frequency bands. The spectrum analyzer 2 is a device for displaying the level
of the input signal for each of a plurality of divided frequency bands, and the center frequency of
each of the divided frequency bands is the center frequency of a plurality of divided frequency
bands which can be level adjusted by the equalizer 3 And each has been made to match. Further,
the level control display unit of the equalizer 3 and the display unit of the spectrum analyzer 2
are arranged in association with each other on the same panel surface. As a result, even when
applied to a complex acoustic signal of frequency spectrum distribution as one manual signal,
level control can be accurately performed by an extremely simple operation with a notable
equalizer that makes it an optimum spectrum distribution at the time of stuttering or
reproduction, etc. It has the excellent features of
(The graphic equalizer Fi proposed by the applicant of the present invention has been configured
to switch and supply the equalizer 30 input signal or output signal to the spectrum analyzer 2 so
that the output signal of the equalizer 3 is generated as sound by the speaker. There is a problem
that the display of the frequency spectrum at the listening position of the sound can not be
performed, so that the level can not be adjusted so that the signal can be supplied at the
optimum level at the listening position. Also, to adjust the level of multiple human power signals.
The number of equalizers and spectrum analyzers equal to the number of human power signals
is required, and simultaneous monitoring of one frequency spectrum distribution is possible, and
there is a problem that the apparatus becomes large. Non-explosion '111 solves at least the
former problem among the above-mentioned problems of Tsudani and also solves the latter
problem 89. The following description will be given with reference to FIGS. FIG. 2 shows a block
diagram of an embodiment of the graph ink equalizer according to the present invention. In the
same figure, EndPage: 2 and 5R1SL are input terminals, and for example, a right channel acoustic
signal and a left channel acoustic signal of 2-channel stereo come in and are supplied to the
equalizer 6R16L. Equalizers 6 REL and 6 have characteristics as shown in FIG. 3 (4), and within
the range of maximum increase @ 肴 10 MAX and IIk large attenuation −-MAX by n divided
frequency bands of center frequency f, ~ 籟And optionally independently adjust the level of the
input sound signal and output it to the output terminal TR 27 L, and also supply it to the
synthesizer 8 through the open / close switches sw, R, sw, and t closed. The signal is synthesized
into a-signal. The output combining signal of the combiner 8 is applied to the contact of the
changeover switch SW2. Therefore, when the changeover switch SW2 is connected to the contact
point a, the combined output signal of the 9 synthesizer 8 is supplied to the spectrum analyzer
12 through the changeover switch SW2, and the display portion 19 of the panel surface 22
shown in FIG. Alternatively, the frequency spectrum distribution is displayed on the display unit
23 shown in FIG. The spectrum analyzer 12 has a frequency band division filter for dividing into
a plurality of frequency bands, the characteristics of which are as shown in FIG. 3). The center
frequencies of the divided frequency bands coincide with the center frequencies f to fn of the
divided frequency bands of the equalizers 6L and 6R shown in FIG. In the case of id, n-11) as an
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example of this center frequency, it is composed of an octave band filter, 31.5 J 63 Hz, 125 Hz,
250 HK, 500 Hz, 11000 Hi, 20008 Z.
4000)1g、8000Hy、+6000H2となる。 In this way, when the changeover
switch SW2 is connected to the contact aK connection [7, the frequency spectrum distribution of
the acoustic signal of the left and right channels can be monitored by a single spectrum analyzer
12, and the apparatus also has spectrum analyzers as many as the number of input signals. It can
be configured smaller than what is provided. Here, the open / close switches sw, Fl, swl, d are
switches which are opened and closed independently of each other by the intention of the
operator, and the open / close switches SW, RO only are closed. Only the acoustic signal is
supplied to the spectrum analyzer 12 for display of its frequency spectrum distribution. Similarly,
the frequency spectrum distribution of the t-channel acoustic signal is displayed by the VC open
/ close switch SW and the O analyzer 6 in the case of the spectrum analyzer 12. The synthesizer
8 is, for example, an adder. The input signal is added to the input signal, or the 11th maximum
power device, and the input signal of the larger level among the 9 input signals is output
alternately to generate the input signal. (Muk / Tum and Bell ten recta). That is, an adder is used
when it is necessary to monitor the averaging of the input M months and the T-sense of the note.
However, in the case of e: ff in 9 cases of electric power, it is necessary to control the peak value
of the level so that the signal level does not exceed the saturation level of the magnet or tag i,
left. Since the signal of any channel on the right must not have the maximum saturation level, the
total level sensor 17 is used instead of the above heater. The sound signals of the right and left
channels taken out of the output terminals 7R and 7Lj of the upper "0000" level are considered
as appropriate from the terminals 13R and 13 in FIG. 4 through the speaker 14R12 via the
amplifier 14R1 + 4fc. It is supplied to 15, and pronounced. In the sound field 18 formed by the
sound from the speakers + 5R and 15L in the listening room. The standard microfore 16 is
placed at the listening position and the speaker 15R115L is focused on the sound of the speaker
15R115. The voltage is applied to the terminal 9 of FIG. The signal from the end 9 is applied to
the contact .beta.b of the changeover switch SW2 through the attenuator z 'at -10,000 and the h
direct contact C on the other hand via the gain amplifier 10 of the dog gain at -10. Here, if the
changeover switch SW2 is connected to the contact point, the attenuator 11 can be used at the
position I?
The level attenuated signal is supplied to the spectrum analyzer 12. Therefore, at this time, the
spectrum spectrum quotient at the snink position is monitored by the spectrum analyzer 12 from
the year r, and the frequency spectrum distribution is equal to the equalizer 6. , 6L by arbitrarily
adjusting the level separately for each divided frequency band, so that the signal can be output
so as to obtain an optimal frequency spectrum distribution (10) EndPage: 3. In the above case,
when the display of the spectrum analyzer 12 is in the vicinity of a very low level, the movable
contact piece of the changeover switch 8w2 is switched and connected to the contact C to
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transmit the microphone output signal from the amplifier 10 without passing through the
attenuator 11. Can be supplied to the spectrum analyzer 12 to provide an easy-to-see level
display within the maximum display level range. That is, since the changeover switch SW2
doubles as the attenuator switch of the amplifier (microphone amplifier) 10, the operability can
be improved. In addition, in order to monitor the spectral distribution of the input signal of the
equalizers 6R and 6L in the above configuration, it is possible to adjust the equalizer 6R96L so as
to flatten the frequency characteristic given by the equalizer 6R96L. Also, the microphone jeti
may be incorporated in the panel surface. Furthermore, the number of channels is not limited to
two. Next, each embodiment of the appearance of the graphic equalizer according to the present
invention will be explained. FIG. 5 shows a front view of the first embodiment of the panel
surface of the graphic equalizer which is unlit (11). In the figure, a plurality of light emitting
elements are arranged in the vertical direction in the figure in the display section of the 19-band
spectrum analyzer 12 for each divided band, and each divided band display 4 in the figure is
sequentially from the lower band , Arranged in the right direction to perform light band display
or light spot display. A level control display unit 20 common to the equalizers 6R and 6L is
provided with knobs 211 to 21 movable in the vertical direction in the figure for each divided
band. The stop position of the knobs 211 to 21 indicates the level control amount, and the unit
(for example, aB) and the level display unit of the display unit 19 are the same display unit. In
this embodiment, the level is simultaneously adjusted by the two sets of knobs 211 to 21 nK
common to the two equalizers 8L and 6RK, so that the structure is simple and the size can be
reduced. Therefore, in this case, the level adjustment is performed in conjunction with each of
the same division frequency bands in the equalizers 6L and 6RF'i.
8w, L, Sw, R, SW2 are respectively sw, L in FIG. The switch operation (12) parts corresponding to
the sw, R and sw2 switches are shown. In this embodiment, on the same surface of the panel 22,
the display portions 19 and 20 respectively have the center frequencies f of the divided bands,
f2. It is piping corresponding to f ,,-, f. 6 shows a front view of a second embodiment of the panel
surface of the graph ink equalizer according to the mineral water invention. In FIG. 5, the same
reference numerals are given to portions of FIG. 5 and FIG. In the figure, reference numeral 23
denotes a display unit of the spectrum analyzer 12 provided at the center of the panel surface,
and performs light spot display or light band display for each divided band. On the left and right
of the display unit 12, a display unit 24L for the left channel equalizer 6L and a right channel
equalizer 6R + 7) display unit 24L1 provided for each divided band are respectively provided.
Display 24L, 24. The knobs 25L, 25Ln, 25 □, and 25Rn are provided. Okoi 9 is the same pain as
terminal 9 in FIG. In this embodiment, the equalizer 6R16L can be separately and independently
adjusted to the level r, and the subtle difference of the sound field due to the speaker distribution
of one individual screw can be controlled separately for each channel, effectively (13) the
equalizer 6R16 □, can adjust the level. As described above, the graphic equalizer according to
the present invention 9 comprises a single spectrum analyzer in combination with an equalizer
that divides an input signal into a plurality of frequency bands and independently performs level
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enhancement or level attenuation for each divided frequency band, Since the output signal of the
equalizer is generated from the speaker, and a signal obtained by performing acousto-electrical
conversion of this with the microphone and one of the output signal of the equalizer are
selectively supplied to the spectrum analyzer, When the output signal of the equalizer is supplied
to a spectrum analyzer, the frequency spectrum distribution of the power signal of the equalizer
whose level is adjusted by the equalizer can be monitored, and the signal obtained by the
acousto-electrical conversion is supplied to the spectrum analyzer Where @ is the sound field
while monitoring with a spectrum analyzer The sound of the microphone installation location at
can be level-adjusted with an equalizer so as to have a desired frequency spectrum distribution,
and a plurality of equalizers are arbitrarily selected among the respective output signals 14)
EndPage: 4- Since signals can be supplied to a spectrum analyzer, level adjustment can be
performed to obtain a desired frequency spectrum distribution for each of a plurality of input
signals, and the respective output signals of the plurality of equalizers described above can be
combined. Desired output signal of a plurality of equalizers is monitored by means of a spectrum
analyzer which can supply the output signal of-of the synthesizer as the output signal of the
synthesizer to a spectrum analyzer. Equalizer level can be adjusted to obtain frequency spectrum
distribution, and multiple equalizers Since the frequency spectrum distribution of the output unit
4 can be monitored all simultaneously, it is easy to visually check 9 For example, when the
above-mentioned synthesizer is used as an adder, it is possible to monitor all the VU of the input
signal In the case of a circuit (maximum output device) to be passed all through, it is possible to
monitor the frequency spectrum distribution of the peak of the input No. 16 and adjust its level.
The common setting is to combine the level adjustment of multiple equalizers (15) in the same
division frequency band.
Compared with the case where level adjustment knobs are separately provided for each
equalizer, the stomach can be made smaller and simpler in structure, and i) (when the level
adjustment knobs are separately provided for each equalizer, monks As a means to control the
subtle difference of the sound field by the channel's speaker arrangement for each channel /
channel, and also to select the input signal of the spectrum analyzer. Since the changeover switch
configuration is also used as the attenuator switch of the output signal amplifier (microphone
amplifier) of the microphone, it has many features such as ease of use.
4. Brief description of the drawings FIG. 1 is a block diagram showing an example of the graphic
equalizer according to the applicant's previous proposal, and FIG. 2 is a block diagram showing
an embodiment of the graphic equalizer according to the present invention Figure 3, Figure 3 (4),
伯) are the frequency characteristics of each of the main parts in Figure 2; Figure 4 shows the
output signal of the equalizer in Figure 2 being produced by a speaker and collected by a
microphone The figures showing the state (16), and FIGS. 5 and 6 are front views showing each
example of the panel surface of the graphic equalizer according to the present invention. 2112
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Spectrum analyzer, 3, 6R, 6 ° equalizer, 8 synthesizers, 15R, isL speaker, 16 microphones,
11.23 spectrum analyzer display unit, 20, 24L, 24R equalizer display unit. Patent applicant
Nippon Victor Co., Ltd. Attorney Attorney Ito Tadahiko (17) Fig. 1 Fig. 2 pEndPage: 5 Fig. 3 hbb--------fn-Iiil Fig. 4 Figure 0 Figure 6 ξ nEndPage: 6
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