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[Description 1] Title of the invention [# microphone for a hearing aid built in a hearing aid
microphone L, especially an eyeglass-shaped hearing aid, and a pressure gradient detector
comprising a pressure sensor microphone with a t pole pair In the microphone for an eyeglass
hearing aid, the acoustic passage is provided extending in a plane parallel to the direction of the
diaphragm of the microphone phos, and the acoustic introduction port is provided at a position
distant from the diaphragm of the acoustic passage. A microphone for a cedar hearing aid that
uses as an aR song that is configured to increase the displacement of the. Condenser equipped
with 1ll pole pair built into 2 and 眠 in the sleep mirror shaped hearing aid! For glasses-shaped
hearing aids with directivity that make up a pressure gradient detector by means of four quarters
and have a single direction of town! イクロホンにおいて、! An acoustic passage is provided
which extends in a plane parallel to the diaphragm surface of the black-and-white and directly
surrounds the back space between the diaphragm and the counter electrode, and the tK acoustic
inlet separated from the vibration / plate of the acoustic passage A microphone for an eyelid
cedar hearing aid, characterized in that it is provided and provided with a KWI friction resistor
either in the sound path or at its end or both, to multiply the displacement of the imaging plate.
2, the scope of claims
3. Detailed Description of the Invention The present invention relates to a unidirectional
microphone condenser microphone, especially for glasses-type hearing aids, wherein the fusion
microphone has a cathode pair and is configured as a pressure difference detector. It is It has
already been proposed to construct a hearing aid by incorporating an existing small microphone
in the portion of the handle of the glasses. Glasses-type hearing aids are generally loved, as their
use is not unattractive to others. However, since the small microphone Nifoshi is a simple sound
pressure detector, it has a spherical directional response and generally changes the handle of the
conventional bell in the narrow cap. It is extremely difficult to incorporate other at into it without
using it. Even if you try to change the spherical pointing relationship of this kind of microphone,
use sF! There is a defect that it can not detect which direction a particular sound comes from
EndPage: 1. That is, in this case, the ambient noise also reaches the user's sense of taste, so that l
[can not be directed to the desired sound source, and understanding of the contents of the
conversation is hindered. For the reasons described above, the receiver of the hearing aid is given
directivity that allows one direction, and the use of 'JIi' is that the sound source location is known
while wearing such a device, and one sound of ambient noise is Desirable to reduce. However, a
directional microphone having remarkable directivity such as unidirectional directivity in
particular requires a much larger sound # element unlike a small microphone having spherical
sensitivity characteristics. If the user wears such a directional microphone and wears the handle
K11i of glasses to be used as a hearing aid, the part widens as wide as the eyeglasses of ordinary
glasses. It takes The present invention is a device which produces a directional characteristic
with a volume saving and a unidirectional town so that a condenser microphone for a hearing aid
constituted by an electrode pair can be incorporated into the conventional microphone without
changing the size of the handle. It is a book to offer. The present invention includes an electrode
pair, and provides a passage 11 for the plaster 11 to be sailed in a plane parallel to the direction
of the diaphragm of the microphone, and the sound 4 is introduced at a position separated from
the moving plate of the sound passage. It is assumed that the mouth is provided and it is
configured to multiply the displacement of the stop plate as f # enemy. Furthermore, the
condenser microphone of the present invention may surround the back space of the diaphragm
and the counter electrode, or may be made in any plane that is parallel to the direction of the
diaphragm. An acoustic passage is provided, and an acoustic inlet is provided at a fixed distance
from the diaphragm in the acoustic passage, and transmission is performed so as to multiply the
displacement of the imaging plate.
Furthermore, according to the present invention, the space between the imaging plate and the
opposing 1 m or the like is connected without blocking the acoustic passage provided on the side
thereof, and the inside of the sound passage or the end portion thereof is any of them. And a
friction resistor is provided to constitute a blue tatami delay element when the apparatus is
operated. Further, in another embodiment of the present invention, in particular, a single finger
direction finger II! It is characterized in that the side of the acoustic passage of the transducer is
provided with an outer W and is formed into a unit type by including an electrode pair which is a
town having a FIN character. The sound path in the present embodiment serves to increase the
distance between the front and rear sound inlets to provide specific directivity characteristics of
the row-1 transducer unit and to achieve the purpose of increasing the pressure gradient of the
device of the present invention. . The micro hoshi of the present invention #i has extremely good
finger, one directionality, but its radius and depth are extremely small as described above, and it
can be realized without increasing the size of a device incorporated into the handle of existing
glasses is there. In the present invention, the unit is approximately II wide and approximately Jan
deep. The cross-sectional force within the acoustic passage closed at the side; about da × 8−the
length is about MgIIm. @ Standard dimensions of the mirror handle is about false in the cross
section! The cold inventive microphone, which is xl, can be incorporated into it without any
difficulty. Since the diaphragm unit and the sound receiving unit itself in the microphone of the
present invention are extremely small, there is no directivity in the frequency domain of the
auxiliary device. L Only the double-coverage P produces directivity, it is a book by the action of
the position of both sound introduction ports and the transmission delay time. One of the sound
inlets is composed of the front side of the diaphragm, that is, the small hole of the diaphragm cap
Kv and the other inlet is composed of the opening provided at the end of the elongated chamber
and the friction Block by a resistor. In a variant of the invention, the tribo-acoustic resistor is
further integrated into the elongated-medium g! Also set up inside the train. Ie in the hollow
chamber. It can be decided. Diaphragm plate-cap K 114: 1 * 1 * with small holes of the size and
distance between the front and rear S and the rear sound inlet can be made sufficiently large.
Although the microphone of the present invention is extremely small, it has at least l1w
integrated circuit. The dance conversion stage can be integrated into the microphone, which
allows the acoustic passage formed as a hollow chamber or the rear KIF of the counter electrode.
According to the present invention EndPage: 2, various problems of follow-up 暎 can be solved,
and the characteristic can be exhibited because of コ サ マ イ ク 四 ホ ホ.
Hereinafter, the present invention will be described with reference to the drawings. In the
seventh quotient · / d '? 'Of *〉-L:-艷 is shown, and this unit can have an integrated circuit. The
front of the microphone unit / + httts cap is provided with a front m-open locomotive for sound
introduction toward the buttocks of a nine-microphone unit l. An acoustic path in the form of 璽 J
is provided in connection with the microphone l. An opening is provided in the M portion of the
hollow crucible 3 and this opening is closed by a Jll 11 resistor. Since the hollow chamber 3
provided with the frictional resistance member forms an acoustic delay element, unidirectionality
of directivity is produced as a whole of the acoustic receiver ν. The distance between the
opening for sound introduction @ and the resistance resistance rod, that is, the distance between
the opening λ and the opening of the buttocks is approximately − to JCIII. The direction of the
microphone looming direction is the direction of the arrow. FIG. 2 is an external view of a
shoulder portion of an eyeglass-type hearing aid incorporating the microphone of the present
invention. The handle portion of this glasses is hollow, and houses "Mai, Iho". Also in the figure,
the arrangement of the acoustical locomotives and the friction resistor dabs show the aft rear
opening. こ? Inside the handle part the amplifier, battery and earphone type, in a known
manner, accommodates a skeletal transmission type sound IIP playback device. The desired
directivity characteristics in the orthogonal plane of @JLW and s4cw-λ are shown. By
appropriately differentiating each element constituting the acoustic delay element, in particular,
the friction resistor, a cardioid characteristic indicated by broken line kj or a wedged cardioid
characteristic indicated by ha line t is generated. The frequency characteristics mainly
determined by the vibration of each diaphragm are shown in FIG. 3 for each diaphragm. The j-th
curve 417 is a frequency response to a diaphragm having a fundamental resonance frequency of
approximately OO00 Hz. Curved curve is a characteristic for the deaf and is obtained using a
diaphragm having about 1100 OHo fundamental vibration. In order to adapt to the condition of
the patient's hearing loss, it is sometimes necessary to use a follow-up amplifier with dumplings.
For such purpose, the frequency characteristic indicated by the curve lNr in FIG. 5 is particularly
suitable. FIG. 4 shows a schematic cross-sectional view of a specific embodiment of the present
invention. To illustrate the size of the microphone of the present invention, the drawing is shown
on a scale approximately twice the actual size. The diaphragm lθ that constitutes the electric foil
is disposed close to the facing% pole //, and the passing hole / 2 is provided in the facing w1
pole / l. When a sound field is added only to this m-th fraction, a directional character of a letterlike form occurs.
Ipsipidosis change made up of excessive integrated circuits! ! The vessel 13 is provided in a
rectangular shell 11 and the shell 1 is provided with an opening / j, and the opening / j is closed
by the friction resistor l 乙. In addition to the friction fort cap, at least seven friction resistors
74m are provided in the acoustic passage. An acoustic delay element of RO type is constituted by
the opening 15 and one of these frictional resistors / 4, It &, and as is known, the unidirectional
operation characteristic of F'Fr '41 of the microphone is obtained, and its maximum sensitivity is
shown in FIG. As shown by the arrows in FIG. A suitable holding cap is provided on the upper
side of the diaphragm 10, which can be #JI on the front part of the mantle wall and has a small
opening 17 as a sound inlet to the diaphragm. An electrical contact / I is provided at the end of
the outer cover 41 of the microphone unit. The plan view of the figure 7 shows the sound dark
inlet constituted by the openings 17 and / 3 provided on the outer side of the outward direction
/ di. These inlets primarily form pressure classes #t for structural elements. The microphone of
the present invention has a small size so that it is <Ka when incorporated into the part of the
handle of the eye, and if desired, the microphones of the present invention may be incorporated
into both handles, resulting in excellent three-dimensional anterior characteristics A hearing aid
can be constructed. The microphone of the present invention is extremely small and exhibits
extremely good directivity, and has a three-dimensional sound effect, so that it has the advantage
of being able to easily detect a sound source.
4. Brief description of the drawings The seventh-is a perspective view showing seven examples of
the microphone unit of the present invention, the J-shows a portion of the glasses handle
incorporating the microphone unit of the present invention, the J-and the reference- Figure
showing EndPage: 3 in the horizontal Wj and the directivity characteristics in the logic
confrontation, the first invention! Fig. 7 shows the frequency spectrum obtained by the
radiophone, $ 4 figure is the side of the microphone Mahfoshi, and Fig. 7 is fi [1IIIIitll. l ...
microphone 嘗 Hoshi units, copolymers, / J, / 7- · · opening, J ... acoustical passages, ginseng, /
≦, / a- · · frictional resistance, 10 ... Sondoban, / / / Counter electrode, 12 ... through hole / / J-
Ishibi dacis converter, / 亭 ... jacket, n-electrical contact. Patent application ^ A.K.G.Axische, U.Sto,
Nogelerethe, Göllschaft, M., Bégeté, Res.-A, H.F.Fugeg, Attorney Attorney Sugimura, Hideoka,
Attorney Sugimura, Kosuke, Six, list of attached documents (2) 1 drawing (3) Application 1 copy
(5) Priority ti certificate 1 copy (original and translated text) 7 Inventors other than the above,
patent applicants or agents (1) inventor (2) Agent residence Chiyoda Ward, Tokyo Acupuncture
stomach 3rd 2nd 4th EndPage: 4