close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPS5981996

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 JPS5981996
[0001]
Field of application The present invention relates to an audio-related speaker system. The
configuration of the prior art and its problems Generally, although it is not possible to switch
between high efficiency and low efficiency broadband with one speaker system, some of the
following methods have been used. In FIG. 1,-+ 11 is an input terminal, (2) is a resistor, (3) is a
switch, (4) is a diplexer circuit, and (5) is a speaker unit. The sound pressure frequency
characteristic when the switch (3) of FIG. 1 is turned on is (7) as shown in FIG. 2, and the
impedance frequency characteristic is 00). The sound pressure frequency characteristic when the
switch (3) is turned off and the same voltage as when the switch is turned on is applied to the
input terminal (1) is (8), and the impedance frequency characteristic is (9). Also, the sound
pressure frequency characteristic when the same power is applied is (6). As described above, low
efficiency can be realized only by inserting the resistor (2) between the input terminal (1) and the
diplexer circuit (4), but it can not be said that it has become a wide band. SUMMARY OF THE
INVENTION In one loudspeaker system, it is intended to be possible by switching between a
substantially high efficiency case and a low efficiency wide band case. In a speaker system having
a branching circuit including an impedance correction circuit which makes the impedance of the
configuration system of the invention a constant value or makes the impedance a constant value
except for the lowest resonance frequency band, the input of the speaker system A resistor, a
choke coil and a switch connected in parallel were connected between the terminal and the
branching circuit. DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 3, the former is a
choke coil, and 02+ is a branching circuit including an impedance correction circuit which makes
the impedance constant. The switch (3) can be obtained by connecting a circuit in which the
resistor (2), the choke coil (14), and the switch (3) are connected in parallel between the input
terminal (1) and the branching circuit (12). The sound pressure frequency characteristic when
entering the ring is as shown in FIG. 4 (7), and the impedance frequency characteristic as shown
11-04-2019
1
in (I6). The sound pressure frequency characteristic becomes 04) when the switch (3) is turned
off, and the impedance frequency characteristic at that time becomes (15). Thus, when the switch
(3) is turned off, substantially low efficiency and wide band characteristics can be realized. The
operation can be described as follows. In the case of WC>, W by the choke coil 入 力, the input
voltage in FIG. 3 is directly demultiplexed circuit (12+ for special price, so the sound pressure in
FIG. -It will be an overlapping part, and the impedance will be an overlapping part of (15) with
the housing 6].
When W> wc by the choke coil aυ, the input voltage applied to the diplexer circuit o21 is
divided by the resistor (2) and drops. The total impedance is the sum of the original impedance
(I6) and the resistance (2), so the impedance in FIG. 4 is represented by (15). Since the input
voltage applied to the branching circuit U2) is lowered, the sound pressure is lowered and
becomes the sound pressure represented by old. In the case of the impedance ([6 j or 8 Ω, the
choke coil (II J has a value of 13 + nH or more, the value of the resistance (2) may be determined
by the required sound pressure reduction degree. Effects of the Invention By switching the
switch, it became possible to obtain both of the case of high efficiency and the case of low
efficiency and wide band.
[0002]
Brief description of the drawings
[0003]
1 is a circuit block diagram showing a prior art example, FIG. 2 is a characteristic diagram
according to the prior art example, FIG. 3 is a circuit block diagram according to the present
invention, and FIG. 4 is a characteristic diagram according to the same circuit.
(2) ... resistance, (3) ... switch, +41-... branching circuit, ... ... choke coil, (I2) ... branching circuit
agent including impedance correction circuit Island-public Figure 1 Figure 2
11-04-2019
2
Документ
Категория
Без категории
Просмотров
0
Размер файла
9 Кб
Теги
description, jps5981996
1/--страниц
Пожаловаться на содержимое документа