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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view seen from the side of the
diaphragm of the speaker of the conventional equalizer, FIG. 2 is a sectional view taken along the
line AA of FIG. FIG. 4 is a cross-sectional view taken along the line BB of FIG. 3 as viewed from
the side of the diaphragm of the speaker of the embodiment. 1 ... equalizer main body, 2 ... sound
path, 2 '...-sound wave emission port, 3 ... sound wave emission surface, 4 ... four parts. 7 I 霞 1 ′
3 2 2 1 1 σ ′ a ′ ′ ′ ′ ′ X 4 ≠-142 ′ 2 ′ f − 117 −
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loudspeaker
equalizer. 1 and 2 show an equalizer used for a conventional horn speaker having a reverse
mood type diaphragm, and this equalizer is a main body (bl A plurality of sound paths (e) are
provided, and sound wave radiation ports of these sound paths (el are concentrated on the
above-mentioned sound wave emitting surface (the central portion of al). However, such a thing
has the fault that the resonance which occurs in these sound paths makes the sound pressure
frequency characteristic uneven because the length of each sound path (cl is almost the same. It
is an object of the present invention to provide a loudspeaker equalizer which can eliminate the
above disadvantages and flatten the above-mentioned sound pressure frequency characteristics.
FIGS. 2 and 3 show an embodiment of the present invention equalizer, and in each of the figures,
+1) is an equalizer main body provided with a plurality of sound paths (2), and the sound wave of
each of the above sound paths (2). The radiation port (a) is concentrated in a recess (4) provided
at the center of the sound wave emitting surface (3) of the equalizer body (1). The equalize of the
present invention has a recess (4) at the center of the sound wave radiation 1n (3) of the main
body (1), and the sound emission port (2) of each sound path (2) is opened in this recess. The
length of each sound path (2) is short and unequal by as much as this, and it is possible to push
up the resonance frequency generated on this side road to a high frequency, and further the
sound of the central part of the equalizer main body (1) By increasing the ratio of the length of
the road to the sound path in the peripheral portion, that is, the ratio of the resonance frequency,
it is possible to lower the sharpness of the resonance of the entire equalizer and flatten the sound
pressure frequency characteristics. In addition, since the length of the sound path is short or less
than L4, the resistance of the sound passing through the sound path can be reduced. 2. Since the
equalizer of the present invention has the above-described structure and function, it is an island
by completely improving the sound pressure frequency characteristics of the speaker and the
efficiency of the speaker.
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