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JPS5366224

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DESCRIPTION JPS5366224
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment
of the horn speaker according to the present invention, FIG. 2 is an enlarged cross-sectional view
of the main part of the horn of the same speaker, and FIG. FIG. 4 is a sound pressure-frequency
characteristic diagram of a conventional and inventive horn speaker according to the present
invention. 1 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и voice coil, 9 и и и magnetic gap Horn, 11 иии и и и и и и и и
Base material и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и urethane
form. ?
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horn speaker
including a horn made of a material having a large loss coefficient and made of multiple layers
and eliminating horn noise. ? ? As the horn of the conventional horn speaker, the one that is
made of metal such as aluminum is large part '--(2 knees 12 minutes, and the small horn is made
of synthetic resin etc. There is no. However, metal has a small loss coefficient, and it is a hard
material even if it uses synthetic tree 4 effect, the amplitude when excited is large, and the horn
squeals become a kind of sound source at horn frequency or special frequency. Was occurring.
This has been a major hindrance in horn speakers that measure high fidelity ancient life. The
present invention eliminates the above-mentioned conventional drawbacks. Hereinafter, the
embodiment j of the present invention will be described with reference to FIGS. 1 to 4 of the
accompanying drawings. Not shown in FIG. 1, 1 is a field section, and this field section 1 is
constituted by a plate 3 provided with two center poles, a magnet 4 in the form of a ring / hook,
and a positive portion plate 5 in the same ring shape. I'm lying. In the field section 1H, the
diaphragm of the toe doll is attached via the ring 6) "7" 1 и ao "07" in 1 и и и и 7 and the coil 8 is the
magnetic gap of the field section 1 I am 31 to 9 years old. As shown in FIG. 2, as shown in FIG. 2,
plywood 9 plaster such as plywood is used as the horn 10, in which a horn 1o constructed by
layering a material having a large loss factor is connected to the field section 1 A lead plate 12 is
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1
attached to a substrate 11 of a boat or the like. A concrete example of this is Soft Calm (trade
name) manufactured by Toho Zinc Co., Ltd. This soft calm has high density (density of lead or
11.34), low rigidity and softness, and is non-porous. The sound passing through the lead plate 12
is extremely attenuated and does not cause resonance in the audio frequency range. A
comparison of the characteristics of the lead plate 12 used here and other materials is shown in
Table 1 below. (Margins below) ?Q44 Table 1 Specially Confining WRp) yrztc Young's Modulus
Marking? dyne / cm Material: Lead plate (Soft Calm) 11.341. Alxlo "Steel 7.802.10 О 1012
Aluminum 2.707.10 О 101" Plywood 0.606.30 О 10 "0 Plasterboard 0.902.00 О 10" 0 Also,
the horn 10 is a thin rubber as shown in FIG. What formed by sticking urethane form 14.15 on
both sides of 7-t 13 can be used.
As a specific example, there is an Hama damper (trade name) manufactured by Yokohama
Rubber Co., Ltd., which has a small vibration at resonance, a small amplitude, and a large loss
coefficient. Next, about the loss factor of the Hama damper and other materials) 77 ', village # 5
Table 2 Material loss factor steel 0. OO01 or less concrete, brick 0.001 to o, oos wood 2
plywood, cork 0.01 to 0.2 Hama damper 0.1 to 0.7, 16 in FIG. 1 indicates an equalizer, FIG. 4 The
sound pressure-frequency characteristic of the horn speaker equipped with the horn 1o made
using the Hama damper and the horn by the conventional casting is shown. The solid line A
shows the characteristics of the horn speaker of the present invention, and A 'shows its harmonic
distortion. The broken line B shows the characteristics of the conventional horn speaker, and B
'shows its harmonic distortion. As apparent from this characteristic diagram, the conventional
horn speaker has a disordered characteristic between 1.2 and 1.5 KHzO, and a horn squeal
occurs in this frequency band. However, the special characteristics of the horn speaker according
to the present invention are stable over the entire tower, indicating that no horn noise has
occurred. As described above, the horn speaker according to the present invention is a multilayered material having a large loss coefficient and absorbs the horn, so that the vibration of the
horn itself due to resonance is suppressed to a low level, and the horn becomes a sound source.
Sound-frequency characteristics can be prevented or disturbed, and high fidelity reproduction is
possible, etc., and it is a large one of the actual shell-like clause value.
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