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JPS52170032

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DESCRIPTION JPS52170032
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a conventional speaker system,
FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is a
diagram showing a speaker system according to the present invention and a conventional
speaker system. Comparison diagram of intermodulation distortion custom order, Fig. 4A. B is a
front view and a side view showing another embodiment of the present invention, and FIG. 5 is a
cross-sectional side view showing another embodiment of the present invention. 2 ... bass
speaker unit, 3 ... middle to high speaker unit, 4, 5, 7, 8, 10, 11 ... baffle.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loudspeaker
system with reduced thermal modulation distortion. Conventionally, in a multi-way type speaker
system, generally, a speaker unit for bass and middle to high-pitched sound is mounted on the
same plane buckle. An example of such a speaker system is shown in FIG. In the (1) 1 °, -5 o,
etc. arrangement of such speaker units in which the low-pitch speaker unit 2 and the middlehigh-pitched speaker unit 3 are respectively mounted on the flat baffle l, the speaker system
itself is high and low Among the sound waves of the high frequency component radiated from
the high-tone speaker unit 3 when a signal having a low-frequency component is applied, a large
amount of the sound wave of the high-frequency component vibrates at a low frequency f. Hit the
vibrating surface of. Then, when the high frequency component 2 is reflected and emerges on
this vibration surface, it is subjected to phase modulation at the low frequency f1 which drives
the low frequency speaker unit 2 and appears as intermodulation distortion. The level of this
intermodulation distortion is quite large, and may reach -40 dB. The present invention has been
made in view of the above-described conventional drawbacks, and the intermodulation distortion
is realized by arranging the mounting surface of the low-pitch speaker unit and the mounting
surface of the middle-high-tone speaker unit at an arbitrary angle. It aims at provision of the
speaker system which was made to reduce. FIG. 2 is a perspective view showing one embodiment
of the present invention. The bass speaker unit 2 is attached to the baffle 4 as a mounting
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surface provided in the cabinet 6 (2) = 1 ° niyuni, and this buckle 4 and an optional angular
black metal are provided as the mounting surface provided in the cabinet 6 The middle and highpitched speaker unit 3 is attached to the baffle 5 side. With such an arrangement, the sound
wave of middle to high frequency, which is easy to receive phase modulation, reaches the image
pickup surface of the January, low frequency January speaker unit 2 with directivity effect
possessed by the middle to high tone speaker unit 3 itself. Will decrease considerably. For this
reason, it becomes difficult to receive phase modulation by the vibration surface of the bass
speaker unit 2, and it is possible to reduce intermodulation distortion. FIG. 3 is a comparison
diagram of intermodulation distortion characteristics with the conventional speaker system
according to the present invention. In FIG. 3, the broken line indicates the intermodulation
distortion characteristic according to the present consideration, and the solid line indicates the
intermodulation distortion characteristic of the conventional speaker system. As apparent from
the figure, according to the present invention, intermodulation distortion is significantly
improved. (3) FIGS. 4 (4) and 4 (B) are a front view and a side view showing another embodiment
of the present invention.
This embodiment is a case where the arrangement of the speaker unit of the embodiment shown
in FIG. 2 is piped at an angle of 90 degrees. That is, the installation angle of the baffle 7 to which
the speaker unit 3 for mid knitting sound is completely attached and the baffle 8 to which the
speaker unit 2 for low frequency is broken is disposed to be orthogonal. By doing so, the
influence of cross modulation can be further reduced. FIG. 5 is a cross-sectional side view
showing still another embodiment of the present invention. In this embodiment, the Nakajima
sound speaker unit 3 having a sharp directivity is attached to the baffle 10 at the front of the
cabinet 9, and the directivity or broad bass speaker unit 2 is attached obliquely by the baffle 11.
By doing this, intermodulation distortion can be reduced without impairing the directivity of the
speaker system. Although some embodiments have been described above, the intermodulation
distortion may be prevented so as not to place the bass speaker unit and the mid-high-pitched
speaker unit on the (4) -or 1't ′ ′ coplanar buckle.・ Because it can be reduced, because it can
be filtered, medium and high-pitched speaker unit and bass Sby; Non-Nison 1- and 180-degree
angle + g of 2 on the front and back; Absent. From the above, 1. According to the 6th aspect of
the invention, intermodulation distortion can be reduced3 with almost no influence on other
characteristics. 4 、 【説明 説明 説明 説明 説明 説明 説明 第 1 1 1 1 1 1 ス ピ ー カ ス ピ ー カ
ス ピ ー カ ((((((((((3 3 3 3 3 3 3 3 3 3 3 3 4 (4) and 4 (B) are front and side views showing
another embodiment of the present invention, and FIG. 5 is another example of the present
invention in the history of the present invention. It is a broken jhi rust front view showing a real
pigeon F · 1. 2 · · Bass speaker unit, 3 · · · middle ^ sound speaker unit, 4.5.7.8, l0111 · · · · · ·.
Agent Shino Nono-(5) Fig. 1 Fig. 2 O FIG. 3 'Sound pressure (dB)' □% -f, fxf, Medium f. am
number (H χ) → Fig. 4 (A) CB) l "2 5 UA 6; Other δ contractors, utility model registration
applicants or agents 考 案 Address theory * ll K, il 1 ::-: Tf Construction, □ 40% three # Electric
side company company name in the product research institute 鴫 鴫 agent zip code>; 100
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address Tokyo Ding-generation lft ward Marunouchi-J 2nd 3rd)-Ryoichi Kiki Inner name: 17375)
Patent attorney: Iwamasu ms); '-7 (hole ·; = l: y-/ rino, entering
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