close

Вход

Забыли?

вход по аккаунту

?

JPH0290895

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 JPH0290895
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system used as an indoor / outdoor sound reproducing device. 2. Related Art In recent
years, due to the tendency of lightness, thinness, and smallness, a speaker that does not require
much installation area has been developed. Among them, there is a speaker system which
reproduces a low distortion and plane wave sound field by reducing the depth and enlarging the
diaphragm surface end. Hereinafter, the conventional speaker system as described above will be
described with reference to the drawings. FIG. 6 is an external view of a conventional speaker
system. In FIG. 6, 1 is gabineno l-12a. 2 b is a low range speaker and 3 is a middle to high range
speaker. The low range speakers 2 a and 2 b and the middle and high range speaker 3 are fixed
to the cabinet 1. FIG. 7 is a circuit diagram showing a signal path of a conventional speaker
system. 4 is an input terminal, 5 is a circuit diagram of a basic network, 6 is a high range
speaker, 7 is a middle range speaker, and aa and ab are low range speakers. The input of the
work 5 is connected to the input terminal 4. At the output end of the network 6, speakers 6 ░
7.8 &, 8b are connected. The operation of the speaker system configured as described above will
be described below. The AC electrical signal input to the input terminal 4 is input to the network
5 and demultiplexed. At the output end of the network 5 are connected speakers suitable for
reproducing a signal separated for each frequency band, and sound is emitted from these
speakers. At this time, each element constant of the network 5 is determined according to the
impedance of the speaker connected to the output terminal and the cut-off frequency. SUMMARY
OF THE INVENTION However, the above configuration can not be easily changed when it is
desired to change the number of bass speakers used depending on the acoustic characteristics of
the sound field using the speakers and the use application. One of the reasons is that the sound
pressure difference between the low range and the middle and high range is generated.
SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a
09-05-2019
1
speaker system which can easily change the number of use of the bass range nuphia. Means for
Solving the Problem In order to achieve this object, the speaker system of the present invention
comprises a circuit for correcting the balance of sound pressure in all bands when the number of
bass speakers is changed, and the number of bass speakers used. It comprises a network with a
circuit for correcting the integrated impedance of the changing low range speaker and a switch
for switching these circuits according to the number used.
Operation With this configuration, it is possible to easily correct the imbalance in the sound
pressure between the middle and high range and the low range due to the number of low range
speakers used. Moreover, since the impedance in the low frequency range can be corrected, it is
possible to prevent the impedance from becoming too small. Embodiment An embodiment of the
present invention will be described with reference to the drawings. FIG. 1 is a front view of a
speaker system according to an embodiment of the present invention. In FIG. 1, 9a and 9b 9c are
low range speakers, and 10a and 10b are middle and high range speakers. FIG. 2 is a diagram
showing a signal path of the above-mentioned speaker. In FIG. 2, 11 is an input terminal, 12 is a
correction circuit, 13 is a correction circuit switching switch, 14 is a mid-high range net soak, 16
is a low range network, 16 is a resistance change switch, 17 is a dummy resistance, 18 is a high
range Speakers 19 are midrange speakers, and 20a and 20b are bass speakers. A correction
circuit 12 and a bass band network 15 are connected in parallel to the input terminal 11, and a
correction circuit switch is provided after the correction circuit 12 so as to switch to a line
directly connected from the input terminal 11. After this switch, a middle-high range network 14
is connected, and a high range speaker 18 and a middle range speaker 19 are connected to this
output terminal. Low frequency band speakers 20a and 20b are connected in parallel to the
output end of the low frequency band network 15, one of which is connected to a dummy
resistor 17 and a resistance changeover switch 16 which can be switched. The operation of the
speaker system configured as described above will be described below. First, in the case of the
system shown in FIG. 1), the switches are switched so that signals do not flow to the correction
circuit and the dummy resistor in FIG. This is the same operation as in the conventional system.
The system shown in FIG. 1 (a) is obtained by removing one tree of the low range speaker 20a
from this state. If the network at this time is a conventional one, the sound pressure frequency
characteristic of this embodiment is such that the sound pressure in the low range falls as shown
in FIG. 3B, and the balance with the middle and high range becomes worse. Furthermore, the
impedance characteristic at this time becomes very small impedance as shown in FIG. 4E.
Therefore, a drop in impedance can be prevented by attaching a dummy resistor in place of the
removed speaker. The impedance differs as shown in FIGS. 4C and 4D depending on the
resistance value of this dummy resistor. The lower the resistance value, the higher the
impedance, but the lower the sound pressure in the low range.
The resistance value is set to a value that can obtain the lowest required impedance path. This
09-05-2019
2
dummy resistor is the dummy resistor 17 of FIG. However, since the sound pressure at this time
remains in poor balance between the low range and the middle and high range, a circuit for
correcting this is necessary. The sound pressure characteristic after this correction is shown in
FIG. 3A, and the circuit is the correction circuit 12 shown in FIG. The switches 13 and 16 are
attached to facilitate the above correction. As described above, according to the present
embodiment, it is easy to obtain flat sound pressure characteristics by providing the network
with sound pressure correction circuits according to the number of bass speakers used, dummy
resistors for impedance correction, and their changeover switches. The number of bass speakers
used can be changed. Furthermore, depending on the application, such as creating a plane wave
sound field or controlling directivity by using a wide range of low range speakers as shown in
FIG. 6 or combining several middle to high range speakers. It is possible to realize a speaker
system capable of creating a free sound field. In this embodiment, one or two low frequency
range speakers are used for one medium / high frequency range speaker, but more than that
may be used. Effects of the Invention The present invention can easily change the number of bass
speakers used by providing a sound pressure correction circuit according to the number of bass
speakers used, a impedance correction resistor, and a switch for switching the same according to
the number of bass speakers used. it can. Further, as shown in FIG. 5, a wide-area bass speaker is
used, or a combination of several mid-high range speakers is used to create a plane wave-like
sound field, and to control directivity, etc. It is possible to realize the Nubica system that can
create a free sound field depending on the application.
[0002]
Brief description of the drawings
[0003]
1 is a front view of a speaker system according to an embodiment of the present invention, FIG. 2
is a schematic signal system of the speaker system, FIG. 3 is a sound pressure characteristic
diagram before and after correction, FIG. 4 is an impedance characteristic diagram, FIG. 5 is a
front view showing an example of one working month of the speaker system, FIG. 6 is an external
view of a conventional speaker system, and FIG. 7 is a circuit diagram showing signal paths of the
conventional speaker system.
9a, 9b, 9 cm-... bass range speaker, 10a. 10b ...... mid-high range speaker, 11 ... input terminal, 12
...... correction circuit, 13 ииииии correction circuit changeover switch, 14 ... mid-high range Network,
15 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 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 Dummy resistance, 18 и и и?
09-05-2019
3
Mid-range speaker, 20a, 20b ? ? ? ? ? ? ? Low-range speaker. Name of Agent Attorney
Attorney Shigetaka Takano and 1 other restaurant 1 x (?-9a, 9b,? c10?, Job - и Tsutomushita?
speed D Nakajima seven wards speed n before pressure characteristics first diagram of the
Figure rEJ wave missing correction ? (a down L Mizunoe Yan Hanru C - &) R + Man'neru 1 - cabinet 2a, 2b -Bass Ssp 3- Mid-high range Sbi ? Dj island Neenotok work high-range zone
Speak power Mid-tone zone speaker Mr.
09-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
jph0290895
1/--страниц
Пожаловаться на содержимое документа