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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a concentrated addition mass
used in the present invention, FIG. 2 is a front view showing an example of a speaker cone
according to the present invention, and FIG. 3 is a front view of the present invention. 2 is a
characteristic curve diagram showing characteristic differences such as frequency characteristics
after implementation. 1 ···················································· Cone paper Fig. 1 − 7 $-31 mm, 1-quantity
0.49 Fig. 2-91 1 実 49-48133 (2) Fig 3 殉, 7 after 7? 宸 楚 ヤ 馳 3, L, 7 100 = 1 100 809 090
060 205 o 100 2005 001 2 2 K 5 κ 10 加 Km current saving (Hz)-92-
DETAILED DESCRIPTION OF THE INVENTION In the frequency characteristics of a loudspeaker,
the present invention is intended to eliminate peaks and dips near its high-pass cutoff and to
reduce distortion of third harmonics at its 1/6 frequency in the frequency characteristics of a
loudspeaker. To aim. Usually, in the speaker, around the high frequency cutoff, the peripheral
portion of the cone paper causes abnormal vibration to cause peaks and dips in the frequency
characteristic, and distortion of the sixth harmonic increases at a frequency of 1/6. In the past,
therefore, corn paper was coated with a dumping agent such as biscolloid as a mass, but in this
case the amount, position, and so on change significantly depending on the difference of 10
minutes or so of the mass. And the stability is not as large as (11 □ -no). The present invention
solves this point and eliminates the above-mentioned drawbacks, which will now be described by
way of example in the drawings. What is shown in FIG. 1 is an example of the concentrated
addition mass 1 adhered to corn paper, which is formed of neoprene rubber into a "-" shape, and
is configured with the illustrated size and weight (04f). Fig. 2 shows four cones of the abovementioned concentrated addition mass 1 adhered to the peripheral portion of the cone paper 2
on the speaker's cone 2 and thus the peripheral portion and the slope of the cone 2 The
characteristic peaks and dips due to abnormal specific vibration generated over time are
eliminated. That is, by the concentrated addition mass 1, abnormal vibration is suppressed and
smooth high cut is performed. By removing the peaks and dips near the high frequency cutoff, it
is possible to reduce the distortion of the sixth harmonic at the frequency of 1/3. The
characteristic diagram shown in Fig. 6 shows the characteristic difference between the case
where the above-mentioned concentrated addition mass (2) 1 is used (after the implementation)
and the case where it is not used (before the implementation). Thus, the peaks and dips near the
high-pass cutoff can be removed by the present invention, and the third harmonic distortion at a
frequency of 1/3 thereof is reduced, and the unnaturalness of the timbre is removed. As
described above, the present invention removes peaks and dips in the vicinity of the highfrequency cutoff on the frequency custom-designed of the speaker by providing a concentrated
addition mass of rubber material near the periphery of the speaker cone paper. Since the third
harmonic distortion of the frequency of 1/3 can be reduced, the unnaturalness of the timbre of
the speaker can be removed.
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