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JPS60193778

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DESCRIPTION JPS60193778
[0001]
Brief description of the drawings
[0002]
1A shows the sound pressure frequency characteristics of the front seat in the passenger
compartment, B shows the sound pressure frequency characteristics of the rear seat, FIG. 2
shows an example of the reproduction system of the in-vehicle acoustic device, and FIG. Figure 4
shows an example of the direct wave and the reflected wave, Figure 4 shows the frequency
characteristics of sound pressure at the listening point, Figure 5 shows the spectrum of the noise
in the car according to the road conditions and the traveling speed FIG. 6 is a circuit diagram
showing one embodiment of the present invention, FIG. 7 is a circuit diagram showing one
example of the first high-frequency correction circuit in FIG. 6, and FIG. 8A is energy of the
speaker. Fig. 8B is a characteristic diagram of the response, Fig. 8B is a correction frequency
characteristic of the circuit of Fig. 7, Fig. 9 is a frequency characteristic by the traveling masking
correction circuit in Fig. 6, and Fig. 10 is a second high band in Fig. A circuit diagram of an
example of the compensation circuit, FIG. 11 is an original signal for each vehicle type A, B , The
frequency characteristic diagram of the output b of the first high band correction circuit and the
output C of the second high band correction circuit, FIG. 12 is a frequency characteristic chart
showing the state of the high band level decrease due to the increase in the occupant, FIG. 6 is a
circuit diagram of an example of the passenger number corresponding correction circuit 16L,
16R in FIG. 6, FIG. 14 is a diagram showing the positional relationship between a pair of left and
right speakers attached to the front door and the listening point, FIG. FIG. 16 is a circuit diagram
07-05-2019
1
showing an example of variable gain devices 25L and 25R in the figure, FIG. FIG. 17 is a circuit
diagram of an example in which a first high-frequency correction circuit on the rear seat side and
a variable gain device are integrated, and FIGS. 18 to 20 are circuits showing a specific
configuration of the display means in FIG. Figure 21 shows the rear parcel tray with speakers
Figure 22 shows the principle of the mirror image effect in the case where the speaker is placed
on the rear parcel tray and Figure 22 shows the frequency characteristics of the rear seat when
the speaker is placed on the rear parcel tray; The standing wave distribution in the room, Fig. 24
shows its frequency characteristics, Fig. 25 shows the frequency characteristics of the power
amplifier on the rear seat side, and Fig. 26 shows the results in the vehicle interior when the low
band is cut. Fig. 27 shows the frequency characteristics of the standing wave distribution, Fig. 28
shows the frequency characteristics of the power amplifiers at the rear seat A1 front seat side B
and bass C, Fig. 29 shows the speaker in the vehicle compartment It is a figure which shows an
attachment position. Explanation of symbols of main parts, 10 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 и и и и и и и и и и и и и и и и 12. seat speaker correction circuit after
ииииии, 15L, 15R ииииии second high-frequency correction circuit, 16L, 16R ииииии passenger number
corresponding correction circuit, 17L, 17R и иииииииии Peak-dip correction circuit, 23L, 23R, 25L, 25R
ииииииии Variable gainer, 30 ииииииииииииииииииииииииииииииии Display means.
?????????? ?? "" "----[[------------'' 11 1 1 input]" Baku 12 figure Inquisitive station
(Hr)
07-05-2019
2
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