JPS61264896

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DESCRIPTION JPS61264896
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
reflective speaker system provided with a reflector. [Prior Art] FIG. 3 is a conceptual view
showing an example of a conventional reflection type speaker system provided with a beam lidar,
(1) is a speaker unit, (3) a sound axis of the speaker unit (1) (2 4) is a top view of FIG. 3 showing
the progress of sound waves from the speaker unit (1). FIG. 5 is a conceptual view showing
another example of a speaker system provided with a conventional flexible lidar, in which (1) is a
speaker unit and (5) is a sound wave from the speaker unit (1) as in FIG. (4) shows a reflector
that reflects sound waves at a plane that forms an angle of 45 ° with the sound axis (2) of the
speaker unit (1), FIG. 6 is a top view of FIG. It shows that it is progressing in a parallel state only
to the person. In the conventional reflection type speaker system as described above, in the case
of FIG. 3 and FIG. 4 of the first example, the sound radiated from the speaker unit (1) has a
conical glue placed forward. The sound waves are reflected by the surface of the flexure (3) and
emitted in the direction shown by the broken line in FIG. 3. The range of the sound waves is
perpendicular to the sound axis (2) of the speaker unit (1) as shown in FIG. It is emitted in all
directions of 660 '. Also, in the case of FIGS. 5 and 6 of the second example, the sound wave is
reflected to the slope flaper (4) at 45 ° to the sound axis (2), so as shown in FIG. Sound waves
(5) are emitted only in one direction perpendicular to the [Problems to be Solved by the
Invention] In the conventional speaker system as described above, in the case of the first
example, sound waves are dispersed in the entire circumferential direction with respect to the
sound axis (2), and in the case of the second fll Since the sound wave is radiated in one direction
with respect to the sound axis (2), there is a problem that the required sound wave radiation
range of about 180 ° can not be obtained by actually using the acoustic device. The present
invention has been made to solve the above-mentioned problems, and the sound wave radiation
angle range which is considered to be sufficient for practical use is set to about 180 ° with
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respect to the sound axis (2). It is an object of the present invention to provide a loudspeaker
system in which the sound pressure level in the frontal direction can be made higher than when
using a conical flapper (3). [Means for Solving the Problems] In the reflection type speaker
system according to the present invention, the shape of the reflection surface of the reflector
disposed in front of the speaker unit is a rotating quadratic convex curved surface.
[Operation] The speaker system according to the present invention sets the radiation range of the
sound to about 180 ° by arranging the rotating secondary convex curved surface of the
reflecting surface of the reflector at a predetermined angle with respect to the sound axis of the
speaker unit. The sound pressure level can be higher than in the case of a conical flapper. FIG. 1
is a conceptual view of a loudspeaker system according to an embodiment of the present
invention, and (1) is a loudspeaker unit. (2) is the sound axis of the speaker unit (1), (6) is
disposed on the front of the speaker unit (1), and the reflecting surface forms a rotating
secondary convex curved surface, (5) is the sound It is a virtual line which shows the radiation
direction of 2 is a top view of FIG. 1, and the sound emitted from the speaker unit (1) is reflected
by the reflector (6) to the direction of about 180 ° with respect to the sound axis (2) In the
speaker system according to the present invention configured as described above, the reflector
(6) has a distance 1 to the speaker unit (1), and the type of the shape of the curved surface of the
second-order convex curved surface. For example, by disposing at a predetermined angle with
respect to the sound axis (2) in accordance with, for example, a rotating elliptical surface or a
hyperboloid of rotation, a sound satisfying the normal conditions required when listening to the
sound of the audio device It is said that the radiation range is about 180 °, and also. If
necessary, the shape or arrangement angle of the reflecting surface may be appropriately
selected according to the above-mentioned listening conditions. [Effects of the Invention] As
described above, according to the present invention, the shape of the reflecting surface of the
reflector is a rotating secondary convex curved surface, and the reflector is disposed at a
predetermined angle in front of the speaker unit. There is an effect that the sound radiation
range and the sound pressure level can be satisfied as a reflection type speaker unit.
[0002]
Brief description of the drawings
[0003]
M1 is a conceptual view showing a speaker system according to an embodiment of the present
invention, and FIG. 2 is a top view of FIG.
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'M3 Figure is a conceptual diagram showing an example of a conventional reflective speaker
system, M4 is a top view of FIG. 3, FIG. 5 is a conceptual diagram showing another example of a
conventional reflective speaker system, and FIG. It is a top view of FIG. The window in the figure,
(1) is the two-speaker speaker, (5) is the traveling direction of the sound wave, and (6) the ball is
light. In the drawings, the same reference numerals indicate the same or corresponding parts.
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