close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPS55146783

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 JPS55146783
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a sound-absorbing
plate used in the present invention, FIG. 2 is a view showing an embodiment of a speaker system
according to the present invention, and FIGS. It is a figure which shows an example of the
characteristic of the speaker system by this. Explanation of symbols of main parts, 1 иии и и и и и и и
Speaker cabinet, 2 и и и и и и и и и и и и и и и и и и и и и
The present invention relates to a speaker system for use in an audio apparatus and the like, and
more particularly to a speaker system which prevents -C of standing waves in a cabinet and
improves sound quality. There is a speaker system as one of the devices constituting the audio
device, and in the case of a cabinet, which is usually made of wood or the like, it has a structure
in which various speaker units in the cabinet l / C are housed. When using a U-1- / Al / 7P sevenfar-fir or full-reciprocal type speaker as the speaker unit, the sound pressure generated on the
back of the cone paper is absorbed in the cabinet to prevent interference of air vibration. I will be
there again. In particular, when the shape of the speaker cabinet is a rectangular parallelepiped
and has parallel inner wall surfaces, a standing wave having a specific resonance frequency is
likely to be generated as air vibration in the speaker cabinet. The frequency of this standing wave
is determined by the distance between parallel wall surfaces and the propagation velocity of the
air vibration, ie, the speed of sound. Each direction in the speaker cabinet? (1) Among the
standing waves generated, the speaker unit is particularly attached to the front panel of the
speaker unit, and the influence of the generation between the knobs and the rear plate of the
speaker cabinet is significant, which degrades the frequency characteristics of the speaker
system. It may cause distortion or distortion. In the conventional speaker system, a sound
absorbing member such as glass wool is attached to the inner surface of the cabinet to prevent
the occurrence of the standing wave caused by the reflection of the sound wave on the inner wall
surface of the speaker cabinet. It is difficult to completely suppress the standing wave generated
between the front baffle and the back plate of the speaker cabinet, and it is difficult to completely
16-04-2019
1
suppress the standing wave generated by the speaker system. Deterioration was inevitable. In
addition, in the case where glass wool or the like is attached to the inner surface of the speaker
piece-javnet so as to exhibit a predetermined sound absorption characteristic, there has been a
disadvantage that it is not easy to simplify the process. An object of the present invention is to
provide a speaker system having high sound reproduction performance, in which generation of
standing waves and prevention of `Knee` are arranged by arranging an excellent sound
absorbing plate in a Hasbika cabinet according to the present invention. An object of the present
invention is to reduce the number of manufacturing processes of a speaker system. The speaker
system according to the present invention is characterized in that the reflection of the sound
wave on the wall surface is prevented by loading a predetermined sound absorbing plate on the
inner wall surface of the speaker cabinet, and the generation of the standing wave is not
generated. The sound-absorbing plate used in the present invention is the sound-absorbing plate
disclosed in Patent Application Publication No. 43801, but this sound-absorbing plate is made of
a mixture of inorganic fibers mainly made of natural fibers and manufactured into a paper sheet
3- And has a cross-sectional shape as illustrated in FIG.
When a sound wave strikes the sound absorbing plate, the air vibration that has entered the
surface of the sound absorbing plate is dispersed by the fibers it that make up the sound
absorbing plate and loses energy, and an air layer is formed on the back of the sound absorbing
plate. Very good sound absorption characteristics can be obtained with almost no sound or
reflection on the wall surface provided with the sound absorption plate. When the sound
absorbing plate is loaded in the speaker cabinet, the above-mentioned excellent sound absorbing
performance is exhibited and the surface of the sound absorbing plate is formed to be uneven
even if the sound wave is reflected on the surface of the sound absorbing plate. Different from
the direction of the incident wave, the generation of the standing wave in the speaker cabinet is
prevented. The speaker system according to the invention C will be described in detail with
reference to the drawings. The cross section of the embodiment of the present invention is
shown in FIG. 2, and in this case, the above-mentioned sound absorbing plate 2 is provided on
the inner surface of the back plate of I , And are disposed so as to face the speakers 3. For this
reason, the pressure generated on the back surface of the cone paper of the speaker 3 is almost
completely absorbed by the sound absorption plate 2, and generation of a standing wave inside
the cabinet is prevented. Fig.3 and Fig.4 и This tile is invented! An example of the characteristics
of the loudspeaker system is In these figures, the curve shows the result of measuring the
apparent mass of the diaphragm of the speaker unit by the mechanical impedance method in a
predetermined audio frequency band, and the curve of the curve shows that the standing wave
generated in the speaker cabinet is a dog. Peaks and dips tend to increase. Both figures ((In the
dotted line, the conventional glass wool is used as a sound absorbing member. In the case of the
speaker system used, the solid line is the characteristic of the speaker system according to the
present invention. As is apparent from these two figures, in the case of the speaker system
according to the present invention, it is understood that the peak and dip of the curve are small
16-04-2019
2
and the generation or suppression of the standing wave is suppressed. As described above, the
speaker system according to the present invention is prevented from generating standing waves
in the 5-re-speaker cabinet by using a predetermined sound absorbing plate having excellent
sound absorbing characteristics, and the performance such as reproduction frequency
characteristics is improved. In addition to this, there is no process of attaching glass wool etc. to
the inner surface of the speaker cabinet so as to include an air layer as in the conventional
manufacturing process of the speaker system in addition to this. It has the advantage of being
very easy to manufacture.
Further, the surface on which the sound absorbing plate is loaded in the speaker cabinet is not
limited to the back surface of the speaker cabinet as in the above embodiment, but it is possible
to provide a sound absorbing plate in a desired surface Y within the speaker cabinet.
16-04-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
jps55146783, description
1/--страниц
Пожаловаться на содержимое документа