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The specification is the title of the invention Head-on 1, Head-on closed / The back door
generation diaphragm forms a coupling chamber on the front side by the earring of the Cheekam
oral type or the spraoral type. A small or flat air chamber (?) Adjacent to a measurement of the
diaphragm-in close connection and in connection with at least seven hollow chambers
acoustically sealed on the back side . Providing a first hollow volume having a good recovery
force, and a second hollow volume is defined by at least 71 channels (/ 2) surrounding the air
column (M,) as the tw mass. The third hollow chamber (10) which is communicated with the
outside and further trimmed to the outside in a tv-like manner. The head cavity 7 peking in the
7th cavity, the ?th hollow chamber is the 1st hollow chamber (rl with the 10 l head via the
resistance (R; resistance)).
-2, Claim
-1 Detailed description of the invention The present invention covers a closed head of a head
hood, and in particular, an fF 'generating plate moving plate with a picture element 1j, a circum
oral jM or a spraorural earpiece, and many connections. EndPage: relates to a head 7 on which
forms a chamber and is connected to the ear by welding, and the rear side is connected to an
acoustically sealed at least / even cavity. This hollow chamber, when the head foon on bamboo is
configured as a flat structure for reasons of shape design. The 9 rooms, which are closed to the
ear with 0 ? ? ? to give a restoring force to the diaphragm, block external touch so as not to
reach the ear, and the voice generated by the head 7 is external It has the effect of As a result of
measurement of this sound insulation, it was announced that the earpiece had almost no
continuous effect in the low frequency region, and the transient 1 @ was about 20a in the other
frequency region. The sound permeability of the earpiece to low frequency sound waves, as well
as the restoring force of the hollow chamber volume, both cause a drop in frequency
characteristics below ???Hz. The object of the present invention is the loss of the low
frequency chain acid caused by the use of the above-mentioned type of head loss. It is to provide
a head over that can be prevented by itv means. To that end, according to the invention, a first
hollow chamber is provided adjacent to the rear side of the diaphragm, which is a small or flat air
chamber and which bears a slight restoring force, and the hollow chamber of @i is: At least seven
passages surrounding the air column as an acoustic mass communicate with the outside, and an
acoustically closed chamber ? is provided in the bottom of the can 7%. The hollow chamber is in
fluid communication with the first hollow chamber via acoustic friction resistance. In the present
invention, on the one hand, a passage is connected to the flat air chamber on the chain side of
the taking S plate to lower the same town resonance frequency of the diaphragm, and the air
column air volume surrounded by this passage is It acts as a constant daily load X on the
transmission plate and, on the other hand, the stiffness of the cavity in the low pigeon region.
These two actions #JwJ can at least compensate for the swallowing generally occurring in @
wave number chain acids below co-? o Hz when using the above-mentioned type of hood //. The
head phone according to the present XA music has some frequency characteristics even in such a
frequency range, and it is possible to even raise the characteristics for low frequency boost.
Acoustic frictional resistance or passive diaphragm in the separation wall between the hollow
chamber acoustically closed to the outside and the M display connected to the ear in order to
make the frequency characteristics more linear when wearing the head hood / Can be provided.
Since the action of such passive diaphragms is known, minor blinding is uneasy. In the preferred
embodiment of the present invention, the hollow chamber acoustically sealed to the outside is
defined by the head case / case. In a preferred embodiment of the present invention, the
dimensions of the passage are changed continuously or stepwise by mechanical means such as
adjusting levers, and the frequency characteristics in the low frequency region are equalized. The
frequency change of the sound pressure in the mosquito group is natural 418! It is very similar
to that in the ear put in the confession sound at the time of picking, and improves the sense of
axiality with head-to-door flight characteristics and perspective. The reason is as follows. That is,
sound insulation through the earpiece in the frequency range of 200 Hz or less, which was
conventionally considered difficult, was abandoned in the headphone of the present invention,
and the frequency characteristic in this range is used in the middle and low frequency range At
least linearized by purely acoustical means to the person's ear, in the S direction the ear's
resonance in the frequency domain still makes it fully functional as it is quite traumatic to obtain
a natural listening sensation. The following is a description of the present invention in the
drawings. Figures && // k) illustrate a strict and simple embodiment of the present invention. At
the time of flight of the head foo / coat the ear in contact with the user's bag with the code /. Sj
as shown in the drawing! [The transducer diaphragm 3 for southing jt M and stiffness D is placed
in a position close to the external earlobe E. However, the diaphragm may be arranged at any
other position of the separating rod. The diaphragm 30 has more resilience than the city, and has
a shallow air chamber l for the city. From this air chamber, a part of the IFi meeting room is
sculpted at the head foo / seiji layer by minute #I provided with a 0 converter sliding plate 3
which guides ch / nel / -2 into the air, Connect 9 air volumes with ?, the bond group 1 and
EndPage: 2 ░ to ? ░. The operation of this embodiment will be described based on the
equivalent circuit diagram shown in FIG. 1b. Conduits / casses representative of the stiffness of
the air volume of the coupling chamber are connected in parallel to the ear innobiance
represented by 2. The peristaltic source of the transducer diaphragm 3 is represented by an
electromotive force EMK in the equivalent circuit, and its internal resistance is covered by a
direct tally connection of inductance and capacitance / resistance respectively corresponding to
the mass M and stiffness D of the diaphragm. The following two-part parallel connection circuit is
connected to this serial weir. One part of the f-shaped part is the temporary leakage of the
diaphragm 3 arranged in the direction of the UK 3-371 in length representing the stiffness D2 of
the air chamber t, the other part is resistance R and cond / + jD, etc. The resistance of the in-line
pillow pillow 1 is the friction of the connecting path between the air chamber of the diaphragm 3
and the hollow chamber 10 acoustically sealed off. The resistance and the length 2717 represent
the stiffness of the volume of air enclosed in the hollow chamber.
The inductance M represents the mass of the air column in the channel 12. The diaphragm
production #I according to the present invention will be readily understood from the equivalent
circuit diagram. The inductance M added on the one hand according to the present invention,
together with the stiffness of the diaphragm and the magnetomotive force five MK, adds an
inductance in the series resonant circuit, and on the other hand the # 'i cords D2 and M, And D3.
The footplates of the cords M, D, M of the OI stringed circuit, which are braked by resistors R in
the two series resonant circuits formed by M and D, are named by resonance In the frequency
characteristics of 0 heft foon where the peak of the station mantissa characteristic ? ff j j
reduces loss in mv = 2 area below 200 Hz by increasing the level below 20 ? Hz #)% this candle
The level reduction that occurs due to the insufficient sound insulation of the iron-layered
Hendhoo / ear in several zones should be bundled and the frequency characteristics should be
improved in response to the burnout. This relief water is filled with the head hood shown in FIG.
In order to further reintroduce syllabary transfer hunting characteristics, connect the threshold
of the combined room and the inside wall @ 10 which is tacitly sealed against the outside to the
sound city and form the connected body as a frictional resistance Do. This frictional resistance is
represented by the symbol R1 in the first 21L and 12b. This resistance is connected in parallel to
the stiffness D, which is represented as a capacitor in the equivalent circuit diagram, and controls
an acoustic short circuit from the front to the rear of the diaphragm 3. Of course, this
arrangement causes a drop of the same wave number characteristic at 200 Hz or less. Such an
irregularity with the same wave number, in particular, 20 (loss under 7H 2 / ? ir? passive
diaphragm is disposed between the coupling chamber and the hollow chamber / ? that is
numerically closed to the outside It can be removed by this. This arrangement is shown in the top
view of FIG. 3a and the evaluation circuit of FIG. 3b. In the wall i which constitutes part of the
valley of the #i chamber and the middle chain io, seven annular openings are formed (to simplify
the illustration), and these openings are shown in FIG. Similarly to it * place the resistance R1t--.
Arrange the wJ diaphragm / gu in a half row turn slightly separated to this, and go to England
with stiffness D4 between the abrasion resistance / evening (R1) and the receiving IJJ diaphragm
/ & The wedge elements D4 and R1 forming the shallow air chamber are elements M2. M2
corresponding to the mass and stiffness of the passive diaphragm / 4t. A braking series resonant
circuit is configured with D5. This resonant circuit is connected in parallel with the ear
impedance 2 to form a shunt for its tuning frequency.
Therefore, for example, for an anastomosis in which the frequency characteristic in the
electrostatic electroacoustic transducer rises to resonance, this rise can be removed by
appropriately determining the above-described constant of the element. FIG. 1 shows the
frequency + -F of sound pressure at the doo when using a wood-like headfo /. ? ft M is 4 that
the drop is less than ? Q ? Hz and that it can be heard at 1 to 1 frequency that can be heard /
? Hz K. In the case of the head 7 on of the present invention, the head is on conventional l! It
becomes clear if the flexibility of the built-in head and the specific resistance is 0. In this
conventional head 7-on, an error of about 10 Hz occurs at about 300 Hz. In the case of the
music, the @ powder shown as broken, 6 and the required increase of 200 Hz or less indicate
that the present invention is a small amount of "fertility". Figures 4.2 and 2 show a cross section
of a practical structure of the head page EndPage: 3 degrees according to the invention. Provide
a book on / off. However, since these casings are of the + nj-structure, only one is shown in the
mud 6 to t as well as W and / or 3 for simplicity. In the embodiment shown in FIG. 6, a Chiecom
2 o'clock is provided and placed on the periphery of this ear 1ri supporting plate or wall. In the
wall ?, for example, the j @-type of f fV conversion is rearranged, and the transducer is provided
with the moving plate 3 and the ho-ring 1 g, and the voice coil is in the air gap of the magnetic
wire. Flattened air chamber in tR ? of zero swing steel plate 3 to place perforated protective
cover 7 or rigid beats in 1 ? U of 0 vibration gain 3 to be protruded? This air chamber t-1st f ?
? ? ? ? ? ? ? ? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?
? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??10 coaxially with the hollow chamber /
Q, which hollows out acoustically to the outside. Into this hollow chamber, and thus into the
middle wall chamber 1. . The restored force of air is used to change the transfer function of the
transducer as described above. An opening for communicating the compartments is formed in
the hollow box 410 and the wall that together define the coupling chamber, and in this
embodiment, only the sound 41 friction resistance it is disposed in this embodiment. The flat air
source and the I / i more narrow passage 12 in the diaphragm 300 thousand are valved to
communicate with the atmosphere, and this one! ! In the i way, the mass action corresponding to
the air column is given to the transmission plate 3 to reduce the number of resonances in the
same town. From the opening / 3 of the passage /-only the sound wave of the frequency range
less than 2D0hz is negatively emitted.
Sound waves outside this region reach the coupling chamber. A path / -2 can be provided not
only with / not only one, but in that case, the weight of the ratio of the steel sheet m side and the
total surface apex of the passage is applied to the total air-warming price or vibration Act on the
board. It corresponds x 1 to the one on the third line of the case line shown in the seventh line.
The differences with the l ? m are as follows. That is, in order to achieve a good linearization
such as M511 wave number characteristics, the passive diaphragm / da in the mouth of ? = one
port which cuts the bonding chamber and the outside and seals it intelligently and communicates
with the mourning hollow chamber 10 Place this shooting board as an acoustic resistance
against rubbing! Brakes. In order to protect the diaphragm mechanically, a grid / l of metal or
synthetic resin is provided which covers the wall ? completely with respect to the coupling
chamber. FIG. 2 is a cross-sectional view of a head 7 / car 7 / g provided with a tin-laural ear rest
17. FIG. In this embodiment, the 11 sound elements are the same as in the previous embodiment.
The slight differences in construction are as follows. In other words, the wall is wide and it is
widely covered by the earlaar-shaped earpiece, and the inside of the binding chamber. There is
no space to form an opening communicating with the cavity 10 in a wall surface located in a
curve parallel to the transducer carrier plate. For this purpose, the openings are arranged in the
cylindrical wall part provided for the acoustic transducer or its holder. The above-mentioned
embodiment is a real system and converter. Instead of the passage provided at the eccentric
position with respect to the shaft rod, the action on the sound pressure characteristics of the 0
backward passage / 2 provided with the passage /-2 on the central axis of the converter is by
closing the opening 13 0 which can be confirmed In that case, a curve shown by a dotted line in
FIG. When the key 13 is released, a curve shown by a solid line or a broken line in the lower
region is obtained. For example, by providing a mechanical modifier, and continuously or
gradually closing the opening 13, the frequency characteristic of the sound pressure at the ear is
changed between the two boundaries lik described above, or in some cases, in lieu of It is
possible to adjust. Such mechanical means can be configured to reduce the cross-sectional area
of the conduit or to increase its length. In the case of 7, the steepness in the low frequency region
can be controlled, and the characteristics can be extended to the low frequency region of / ? Hz
or less without strengthening the low region. No. 7 and? As shown in the bad, arrange the foam
material / l to make the sound transmission M, and brake the hollow chamber with this
generation material #! It is possible to make In FIG. 5, the central axis shows the Cheekam oral
form, the soot 2 in the present invention of the present invention, and the dashed line shows the
stuttering value d (dB) in the head foe / the broken line shows that the material is filled in the
first part. The sound insulation 1 in the conventional structure hood 7 which does not take
measures against EndPage: 4 according to the present invention is shown.
The sound insulation value in the head 7 on according to the invention is much smaller than in
the known head 7 on, due to the passage 12 communicating the flat air wr with the atmosphere
behind the diaphragm 3. In any case, the difference is small and practically meaningless, and it is
limited to a passage /, a mouth by 2 and an air chamber t, and a fall frequency region
corresponding to a scan action. The present invention is suitable for a transducer of the type that
operates in the form of an orn dynamic type, a diaphragm type, or an electret, as long as the
nausea acoustic type m5 WIJ of the type that south-ends the voice generation peristaltic plate.
The present invention in any of the forms of noble raw sound by Hesodo Huon. Improve the
quality of the 200-Hz or later -F ? mantissa range
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 12L, a and Ja show the principle configuration of
an embodiment of the present invention, and FIG. 1b, FIG. 1b and FIG. 3b show the embodiment
of FIG. FIG. 9 is a graph showing the frequency characteristics of the head 7 on according to the
present invention and the conventional head 7 / FIG. 9 is a graph showing the lotus note
properties of the head fore according to the present invention and the conventional 6.7 and 2 are
cross-sectional views of an embodiment of the present invention. Ko ... Separate wall ,? иии Second
/ moderate presentation, q, / r, R. R1 и и и и и и и и и 2 hollow chamber / / и и и и и и и и и и и и и и и и и и и и и и и и
M2, M2. -, D5: Passive diaphragm% ?, ... Air column in the passage ? ? Mitt, Beschlenktel, Huff
Song Fl (y, 1aFIG, 1brlG, 2oFIG, 2bFIGJaFIG, 3bEndPage: ?
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