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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sound pressure-frequency characteristic
diagram of the bass cone speaker, FIG. 2 is a sound pressure-frequency characteristic diagram of
the bass cone speaker when a bobbin-mass is added, FIG. 3 Fig. 4 is a cross-sectional view of the
cone speaker according to the present invention. The mouth is a perspective view of the sound
pressure generator and its cross section, and FIG. 5 is a sound pressure-frequency characteristic
diagram of the cone speaker of the present invention. 1 ...... cone type vibration plate, 2 ......
central drive unit, 10 ...... vent 9 ...... disc, 8 ...... Cylindrical boss, 5 ..... Sound pressure generator.
DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the
improvement of coking strength, and in particular, as a means for suppressing the distortion of
sound pressure that occurs in the vicinity of Ibaraki's limit circumference fatigue of J-shi λ for
bass. It is provided. For at "-In the case of a hes- sica, a sound pressure peak occurs generally
near the single-field frequency. This "Pe '" is larger as the case is closer to straight. Until now, it is
possible to easily suppress this peak according to the present invention, whether trials to reach
this peak have been carried out frequently. Fig. 1 shows an example of the back pressure
characteristics for tf]-cis force 9, giving an e-ring of considerable sound pressure in the vicinity of
the ^ area technology. The reason why this phenomenon occurs is that the nodal resonance of
the cone diaphragm is caused by a single point, using the #>-/ j '-' l "(1 · J: · two-port graphing
technique) , At that time. This can be clarified by the hologram reproduction of 伽 MJJ 7 -do at 1
& number of cycles. To suppress the peak of this ridge is to improve the sound pressure
characteristics of the cone speaker. As a means for suppressing this phenomenon, it has been
conventionally practiced to add a mass to the neck of this voice coiler of the voice coil. FIG. 2
shows the speaker of FIG. By this mass addition, which shows the change in sound pressure when
the mass of Of is added, the value of the peak shows a small amount of Cfi, but it is still
insufficient. Furthermore, when the mass is increased for decreasing the load, the dip that occurs
at a frequency slightly lower than the peak generation frequency also decreases the sound
pressure, which is deeper in history 9, the relative between the peak and the dip Sound pressure
difference is not mitigated. The present invention provides an improvement based on this point
and provides means for effectively suppressing the sound pressure peak. One embodiment of the
present invention will be described below with reference to FIG. 吟 5 5181ri the present
invention]-shows a cross section of a speaker and is made of paper etc.-corresponds to the
central drive racke of the heart type Bm movement 椴 i1)] Il small red y 3 3) a ratio generator 15
+ The layer is fixed. In the figure, I is the Kasbushito city, (6 companies, Etji & t7 rt. Now,
everyone who is the owner of the present invention has a crusher (5), whose details are shown in
FIG. 4 and has a cylindrical car (λ section t8) made of a negative material that plays a role as a
valuable, In the direction of the end of the port λ, a disc (9 J '+ mounting, air circulation 7') is
made of a 4 ik 祇 or a plastic plate toward the end of the &) &) 'J small hole 4 C 6 is also 0 · Fix
the boss end of the 0 sound pressure generator to the above-mentioned "Irubopiso egg 3)".
By making the above-mentioned tachibana, since the node-circle resonant portion of the
separately described Kosi-type diaphragm (1) and the bone 13 of the middle 'lli LIM J II J portion
(2) mutually sapon in opposite phase, the resonant portion The sound pressure generated in the
above and the t ratio generated by the pressure accumulation generating disc (9) of the bobbin
portion mutually cancel each other, and the C-- of the sound pressure generated in another nodal
circle convoluted portion can be phased Mk. 4 Figure 5 ‒ This contrasts with the unpaired line
(dotted line) when the sound pressure generator (5) is attached to the central moving part of the
tension force (solid line). It is the characteristic view shown. The weight of the cylindrical boss of
the j4h sweet sweat generator is equal to the weight-added lid shown in FIG. Is the book also a
good cause as shown by the characteristic diagram in Fig. 5? By carrying out the packaging, it is
possible to immediately control the occurrence of # Wang Jing and greatly improve the
characteristics of the bottle strength.
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