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JPS60193784

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DESCRIPTION JPS60193784
[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 block diagram
showing one embodiment of the present invention, FIG. 7 is a circuit diagram showing one
example of the first high band correction circuit in FIG. 6, and FIG. 8A is an energy response of
the speaker. 8B is the correction frequency characteristic of the circuit of FIG. 7, FIG. 9 is the
frequency characteristic by the traveling masking correction circuit in FIG. 6, and FIG. 10 is the
second high frequency correction circuit in FIG. Fig. 11 shows the original signal a of each
vehicle type A, B The output b1 of the high frequency correction circuit 1 b. The frequency
characteristic diagram of the output C of the second high frequency correction circuit, FIG. 12 is
a frequency characteristic diagram showing the state of the high frequency level decrease due to
the increase in the occupant, FIG. Fig. 14 is a circuit diagram of an example of the passenger
number corresponding correction circuit 16L, 16R in the figure, Fig. 14 is a diagram showing the
positional relationship between a pair of left and right speakers attached to the front door and
listening point, Fig. 15 is variable in Fig. FIG. 16 is a circuit diagram showing an example of the
07-05-2019
1
gain units 25L and 25R; FIG. 16 is a circuit diagram of an example in which the first highfrequency correction circuit on the front seat side and the passenger number corresponding
correction circuit in FIG. Fig. 18 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 integrally formed, Figs. 18
to 20 are circuit diagrams showing a specific configuration of the display means in Fig. 6, Figure
21: Speaker on rear parcel tray FIG. 22 shows the principle of the mirror image effect when
placed, FIG. 22 shows the frequency characteristics at the rear seat when the speakers are placed
on the rear parcel tray, and FIG. 23 shows the cabin interior when the low band cut is not
performed Figure 24 shows the frequency characteristics, Figure 25 shows the frequency
characteristics of the power amplifier on the rear seat side, and Figure 26 shows the standing
condition in the cabin when the low-pass cut is performed. Fig. 27 shows the frequency
characteristics of the power amplifier, Fig. 28 shows the frequency characteristics of the rear
seat A, front seat B and bass C power amplifiers, and Fig. 29 shows the speaker in the passenger
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 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 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 Peakdip correction circuit, 23L, 23R, 25L, 25R ииииииии Variable gainer, 30 ииииииииииииииииииииииииииииииии Display
means.
? ? ? ? ? 100 7 O ? ? (? k) 10 K circumference protection (H, 711 ? ? ? ? ? 80 river
[falsification (dB)
07-05-2019
2
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