JPS5496634

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DESCRIPTION JPS5496634
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional
speaker device, FIG. 2 is a cross-sectional view showing an embodiment of the present invention,
and FIG. 3 is a schematic view of FIG. It is a perspective view showing the example of a unit.
Description of main drawing numbers, 1 ... 1st speaker 2 ... 2nd speaker 3 ... porous unit.
The present invention relates to the improvement of a loudspeaker system, and more particularly
to the improvement of the phase characteristic of a multi-way loudspeaker system in which a
frequency band is shared by a plurality of loudspeakers. A multi-way speaker system in which a
plurality of speakers are arranged in one cabinet and a frequency band is shared by each of a
plurality of loudspeakers of a target period (a fence 6 is finished 2 is a public device is a single
speaker knowledge . Compared to a speaker device which allows such a speaker to take charge of
the whole frequency band, the band expansion, finger rl nearer 'l, x. Improvement of directivity,
reduction of distortion due to split resonance, etc.--------------------------------------------------------------------------------1 Also has the disadvantages of The present invention focuses on the phase defects
described above and attempts to improve it. As shown in FIG. 1, 0 ゞ 2 vO) xe-ka (1) and (2) 0
among the first speaker (1) are arranged in a low frequency range as shown in FIG. , And the
second speaker (2) share the higher frequency band. Therefore, the virtual sound source of a
normal cone-type speaker or dome-type speaker is set at the neck portion of cone paper, and
generally the sound source position of the speaker sharing the low frequency region and the
frequency higher than that There is a difference between the sound source positions of the
speakers sharing the area. In FIG. 1, the virtual sound source of the first speaker (1) is at point (,
and that of the second speaker (2) is at point fB1 +. For this reason, a distance 3 departure such
as td is generated between the rain sound sources. Therefore, a difference of fd) also occurs
between the sound waves radiated from the first and second speakers (1) and (2), which
adversely affects the phase characteristics. Conventionally, as a method to compensate for the
difference in distance between the sound source positions described above, two baffle plates are
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provided, and the baffle plate to which the first speaker (low band) is attached is the baffle plate
to which the second speaker (high band) is attached The second speaker's baffle "'ll l l l xe-"
makes it project more forward b. 2. ッ7.3よ、□ヵ、。 There is something that has been
done. However, in such a case, in order to obtain a black single-1000-abinet structure if two
baffle plates must be used, there is a drawback that it is difficult to add. The present invention
has been made in view of the above-mentioned point, and it is intended to improve the position
characteristics based on the difference in the sound source position of each speaker of the multiway speaker device, as to make any work on the baffle plate. is there.
Hereinafter, an embodiment of the present invention will be described with reference to the
drawings. In FIG. 2, the point different from FIG. 1 is in the porous unit (3) forming four paths in
the delay path disposed on the front surface of the second speaker (2). Thus, the lengths and
angles of the respective holes of the porous unit compensate for the distance difference (d)
between the sound source tA of the first speaker (1) and the sound source filJ of the second
speaker (2) and It is set to the angle. As a result, the sound waves emitted from the first and
second speakers (1) and (2) have equal arrival times at any given point, thus achieving improved
phase characteristics. An example of the porous unit (3) is shown in FIG. ws3. The porous unit (3)
forms five passages (5) by six flat plates (4), and the sound wave from the second speaker (not
shown) enters from the back of the unit (3), It is radiated to one side via the passage (5). As a
factor to deteriorate the phase r property, the above-mentioned sound source-character (Dffi @)
JMK Fi'Minj 5 e? = A4 @@ E'l $ "6,-the beam is not the distance difference, but the factors change
according to the listener's listening position value 1,-) B,-, so they are completely compensated It
is difficult to do. However, in the case where the virtual listening position is determined and the
compensation according to it is to be performed, the length for compensating for the distance
difference plus the length for compensating for the distance corresponding to the virtual phase
rotation amount of 5 is 1 It is sufficient to determine the length of the passage of the unit, and
their improvement can be made arbitrarily according to the gist of the present invention. As
described above, in the third aspect of the present invention, the phase characteristic is improved
by providing a delay path in front of the speaker in charge of the high frequency region. The
equipment of the (of all the tedious work (do not require high practical value. In addition, since
the shape of the porous unit forming the delay passage can be arbitrarily designed without
impairing the essence of the present invention, it also has a design effect of providing a novel
appearance to the speaker device.
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