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DESCRIPTION JPS5653892

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DESCRIPTION JPS5653892
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of the electronic sound resonator, and more specifically, 11 persons of 2 persons (12 single
speakers are divided into two units or two units are inserted), and the insertion of characters is
The speaker's single force, this is emitted iso-vibration & 瓜 width α) 2) sound wave synthesis to
form a pre-senile sound wave, and the power correction is improved by a 2-character correction
and 1 +! : Characterized by Conventionally, in the same single speaker, in order to improve the
speaker's efficiency (in the case of i + ll, a speaker having Helmhol = 1-3 and 22-no resonator etc.
is required to increase the electron 7 or current). I was going. While doing η. As shown in Table
1, power is not proportional to voltage ratio or current ratio. For example, to the relationship
between Sb-Kanopower f80 dB color 100 dB 2 dB head direction 1 debel and how to set and
current or (1 ratio of power ratio to power ratio de Nohher 'current or voltage ratio def pel 0D60
filter 4.83.956.04 + 2.057 .05 + 4.0678615688181951010TOO 20TOO 401, ODD 50j, 00060 +
o, oooan + o, ooos. In order to make it 100.0050TOo, 000100 j, 000, 000 Aol, 000, 0001 202- +
C (1 * or the current must be increased by about 10 times. As a result, the consumption current
increases, and I is inconvenient with respect to the one that requires all the low consumption
current such as a clock. As can be easily understood from the theoretical formula reduced to 1
power + q (a) 弐, sound pressure is dependent on 1 particle degree, sound propagation velocity,
and medium-specificity. p'1 ==-= pu = pcu '-(a) Formula II intensity of flat surface wave [erg A
residence] p particle speed variation [c1' n / S period] propagation velocity of C0 sound Buddha]
ρ: medium density Cg / ffl '] this book consideration +-s! 7e to solve the problems following the
problem, its purpose is to improve the overall power of the speaker with low current
consumption. In order to achieve this purpose, in the present invention, a pair of speaker
enclosures having substantially the same speaker characteristics are disposed in the same
resonator, and the sound of each speaker is his emission point ° C. It is characterized by the fact
that the sound hole is completely perforated. The present invention will be described in detail on
the basis of the preferred embodiments of the present invention shown in the drawings. In the
present invention, a single speaker includes basic sound waves and a basic sound wave and
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harmonics, but also includes LJ), but in the embodiment, a basic sound wave and harmonic tWf
speakers are described alone.
FIG. 1 shows a cross-sectional view of a preferred loudspeaker according to the invention,
wherein the resonator 2 is shaped with openings 4 and 6 at both ends, and the longitudinal
central side lL '-"n of the resonator 2 is shown. The sound hole 8 is formed. A pair of loudspeaker
units 10.11 is provided at the opening 4.degree. ← Half sides are fixed facing each other. The
distance e between the sound wave emission 412 of the speaker single body 10 and the sound
wave emission part of the speaker single B-shaped correction body 11 曇 cloud (10.11 force rest
from the speaker is set to half of the wavelength of the basic sound wave ing. B changes to a
wavelength of the sound wave at a certain wavelength, but it has a fundamental frequency 2 of 1,
for example, 2048 Hz, a wave 1HFJ 16.6 crn at an air temperature of 15 ° C. and a 4 ° speaker
unit 10.11. As shown in FIG. 4-2, it has a fundamental sound wave A having a fundamental
frequency of 2048 Hz and a harmonic B-i having a frequency of 4D 96 H 2. Thus, in the speaker
miniaturized in FIG. The distance p between the sound wave emitting portion 12.13 of each of
the loudspeaker unit 10 and the loudspeaker unit 11 is a length of half of the wavelength of the
fundamental sound wave A, that is, from the sound emission'@12.13 to the sound hole 8 The
length of H is set to the quadrant σ) -wavelength of the harmonic B. Next, the operating
principle of this embodiment will be described. The pair of speaker seals 10.11 in FIG. 1 are
operated as the same drive circuit (not shown) VC. The sound waves emitted from the single
speaker 10) are lowered in FIG. 2). 4た。 The sound wave r1 emitted from the speaker unit 11
is moved to the position shown in FIG. These sound waves' C4K214 (3i1cyF, are synthesized as
being, and there is one standing sound wave. 田 in the standing plane wave system is given by 刀
p (dyne, 7/7) □-19 following formula (b) and this (1 maximum of pressure is sound source-) 4
order l)-his length apart I'm doing a lot less. C′′p (stn (ct) (st) cos (tz)) − (b) αl 韮 −: to the
image capture width [m of particle displacement]: 2π / λλ: wavelength [α] C ′ sound velocity
4) ρ: density of air Cg / m1t time Sec] χ: distance from χ-0 in the traveling direction of the
sound wave to the distance from the observation point [ffi] As the power of the speaker + 4
above に (a) indicates, the larger the sound pressure, the larger the sound pressure. Here, the
sound wave of the present embodiment is composed of the basic sound wave A and the harmonic
wave B, and as shown in FIG. 2 (3), the sound pressure is small at the central position between
the sound wave emitting portions 12.13. It has reached the highest.
That is, in the 9th embodiment 7) the speaker 0 is the largest in sound pressure emitted from the
sound hole 8. Therefore the power (1 maximum. In the present embodiment, the single speaker
10, 111. -J. Helmholtz 'ti 6 f mounted loudspeakers I! At a position where the I # person is at the
sound hole force of 1 61 resonators, 1 Q cm @@, the voltage is 1.5 * 90 dB and the peak current
F 160 mA. On the other hand, in the case of the resonator 2 reduced in FIG. 1, the power 1Q3cLB
at the electron 1.5v and the peak current 12Off1A or less are obtained by oscillating the pair of
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2
speakers 10.11. As described above, according to the present embodiment, the peak current is
not more than twice the beam current of one speaker equipped with the Helmholtz co-imager,
but the power is also improved by 11 dB or more. The power of the speaker at a voltage of 1.5 π
π. Approximately 9 Ddt3. When two loudspeakers having a Hermholno resonator with a peak
current of about 60 mA are operated with their sound hole openings directed in the same
direction, the beam current is about doubled. However, it is well known that a speaker power (a
gain of -15 dB or less can not be obtained). As described above, according to this embodiment,
the power of the speaker can be improved to 100 dE7-or more under the peak current of 120
mAi by reducing the 6 pressure released from the sound hole 8. FIG. 3 shows an embodiment of
the present invention. (The same reference numerals are attached to the same components as the
above-described embodiment, and the detailed description will be omitted. A sound hole 18 is
bored in the resonator 16. The speaker unit 10, 111-j has the same sound wave as the speaker
unit 10, 111-j mounted on the resonator 16 and the sound pressure 1 set to (C). ) Cdyne // 7].
Since p = a and (ct 各 々 z)----(C) K to p'a, therefore, the sound waves of each of the sound
pressure of the speaker 11 shown in FIG. 6 are synthesized, A sound pressure more than twice
that of a single speaker 10 can be provided. Further, the shape of the resonator 16 (1. As is well
known, the theoretical formula in the Helmholtz resonator can be appropriately set. Therefore, in
this embodiment as well, as in the embodiment shown in FIG. 1, it is possible to improve the
voltage more than the threshold voltage 11 by more than the sneaker power k lood B, at this
time q to the peak current Do not exceed twice that of a single speaker, that is, 120 mA or less.
8- As described in detail above, according to the present invention, the structure of the resonator
can be easily set according to the resonance frequency, or the theoretical equation of one
resonator number of legs, or the like. -1, it is possible to improve the haze by 10 dE 34 or more
in the increase of 2 times or less of the bead current. As a result, it is possible to provide a
speaker having high power at 1 m and 1 low current consumption.
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