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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vocal aid for a vocal
cord disordered person according to the present invention in a wired system, and FIG. 2 is an
example of a bone conduction type ear microphone used in the present invention. 3 is a partial
sectional perspective view of the present invention as a wireless system, and FIG. 4 is a graph
showing an example of frequency characteristics of a bone conduction type ear microphone used
in the present invention, FIG. 5 is a graph showing the output frequency characteristics of the
peak cut device used in the present invention. In the figure, 1 is an ear microphone, 3 is a
piezoelectric element, 4 is a spin car, 5 is a peak cut device, 12 is an oscillator, and 14 is a
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a speech aid suitable as a speech aid for a person who can not make a loud voice necessary for
speech of a person with vocal cord disorder. More specifically, the present invention relates to
the improvement of the speech aid previously proposed by one of the present inventors as the
real 1 @ 1 i 145 u-628 97 (Japanese Patent Application Laid-Open No. 51-143397). One of the
present inventors is a person who can not make a loud voice necessary for conversation, ie, a
person with a vocal cord disorder, a person with paraplegia or a person with artificial speech in
laryngectomy, such as Sound P 有 身体 、 1, 1 friend 良% 通% Ministry of voice, old age 6 慮 VC
慮 慮 が が が が が て て て て て part of the body We developed a speech aid that made it
possible to put out the volume required for conversation by wearing it, and previously proposed
it as Japanese Utility Model Application No. 50-62897. The configuration of the speech aid
according to the proposal of this pre-roll is a bone conduction type fixed to a part of the body to
which a bone conduction sound signal (vibration) such as a throat 1IIs, a forehead, a wall of the
ear canal and a mastoid are transmitted. It consists of a combination of a microphone and a
microphone that amplifies and outputs an audio electric signal from this bone-electric 4 ffi
microphone. The inventors of the present invention continued their earnest research in order to
put the speech aid into practical use, and as a result, the following four points? It has been
confirmed that a bone conduction ear microphone having & has been most suitable as a voice
pick-up amplifier for a speech aid as compared to other bone conduction microphones.
[Available] Easy to install and remove because it can be attached to the ear canal. ■ @ @ Other
bone conduction type micro which is defined in throat and forehead area using band etc. of 、, に
お い に お い ° C ~ 3-are notable for discomfort or discomfort in use, but ear The microphone
should have no such discomfort. ■ A piezoelectric element is mounted in the ear canal to pick up
bone conduction voice signals from the wall of the ear canal, so removal of external noise is easy
and only bone conduction voice signals accompanying vocal cord disease names etc. The tube
can be pinked up and a high definition speech can be obtained. ■ As it is attached to the ear
canal as if it is an earphone, it has good appearance. ■ In the case of a bone conduction probe
microphone which is incorporated into the strings of glasses and picked up from a mastoid
protrusion, the cost of glasses with special strings is high and it can be applied to generality, but
the ear microphones are attached to the ear canal8 Because it is a pottery, it is suitable for low
cost mass production and versatile and self-made C and. One strength, the Kokokudera-ji Temple,
the Kokoku-Conducting Type 1-Yar Microphone which produces various characteristics as
mentioned above is manufactured on a trial basis 1. The experiments of the buildings are carried
out as q It turned out that such a fault arises.
That is, as shown in FIG. 4, the bone conduction layer ear microphone uses a piezoelectric
element to pick up a bone conduction sound signal from the wall of the ear canal and convert it
into an electric signal. If the output level of the nuclear speaker is increased in order to be carried
to the person with vocal cord disorder wearing the ear microphone in the case of a speech aid
and the speaker in the case of a speech aid, the effect of crosstalk causes an ear microphone to
Howling may occur due to resonance between the frequency characteristic beak p and the
speaker output. Therefore, the object of the present invention is to The bone ear type ear
microphone having the characteristics of Ll-O is adopted as a microphone for picking up voices
of vocal cords ff1Jl, etc., and the output level of the speaker used in combination with this ear
microphone and carried is also increased. How to prevent howling all occur 1! Providing an
improved speech aid for the Ministry of Diseases and the like. The details 118 of the present
invention for achieving the above object will be described based on the illustrated exemplary
embodiments. In each figure, 1 is a bone 4 type ear microphone attached to the external ear
canal of a person with vocal cord disorder etc., and the microphone main body 2 (for example,
aluminum) which receives the bone conduction sound signal (vibration) in contact with the wall
of the external ear canal It is formed in a cylindrical shape so as to be insertable into the ear
canal by temple gold S or hard plastic material or the like. 3) and 4 are ear microphones, which
are built-in piezoelectric elements 3 that vibrate (acceleratingly) in response to the service of the
microphone body 2 and convert bone conduction sound signals (vibrations) into electrical
signals. A speaker for amplifying an electric signal of l and outputting it as a loud sound, and has
a beak cut device 5 for cutting or reducing a frequency band including a peak plL of frequency
characteristics of the piezoelectric element 3. In the figure, 6 is a piezoelectric element 3t-one
member to support, 7 is a lead wire, 8 is an amplifier, 9 is a total failure of the electrode. In the
same manner as Nono Sfilter or Hano (Ndoh □ Repass filter or 紘 Equalizer), the piezoelectric
element 3 (DtB force is input to the peak 9 portion of the frequency characteristic of the
piezoelectric element 30 Any frequency band may be cut or reduced as long as the speaker 40 is
input. Specifically, if the beak p of the frequency characteristic of the piezoelectric element is, for
example, 5.500 Hg to 6.000 Hz, the frequency band of 5.000 H1 to 6.500) h including this
frequency band is cut. If a filter or the like is used, or if the frequency characteristic of the
piezoelectric element 30 is as shown in FIG. 4, as shown in FIG. 5, an equalizer which outputs the
frequency characteristic opposite to that of the piezoelectric element 30 described above. Etc.
can be used.
In addition to coupling the voice microphone according to the present invention to the ear
microphone and the speaker in a wired manner, they may be coupled in an aspect manner. That
is, as shown in FIG. 3, for example, in the case of an earpiece, an amplification all that increases
the output of the piezoelectric element 3 and a sounding sound emitting an electric-electric
signal having this amplification r in the case lO. , And a receiver 14 for receiving an oscillation
signal from the transmitter 12 in the speaker 47-. In FIG. 3, reference numeral 15 denotes an
antenna. The operation of the present invention having the above configuration is as follows.
Wear the ear microphone if in the ear canal, and carry the Svee sword-4 in the chest pocket or
the like. Then, when the vocal cord disease Ministry equipped with the ear microphone 1 utters,
the bone conduction sound signal (vibration) is transmitted to the wall of the ear canal, which is
picked up by the piezoelectric element 3 and converted into an electric signal. Derived into! And
(when the wireless system is adopted, it is transmitted and received by radio). This electric signal
is amplified by the amplification # # 8 and outputted as sound from the speaker 4 through the
beak cut device 5 ft. Become. According to the present invention, vocal cord disease! I picked up
the voice of the person who can not put out the big p necessary for the gold-punching of the
temple, and the bone conduction type ear microphone was 71). II! Sometimes, since the Heakudo
device gold metal 8-8 speaker is used, howling does not occur even if a person with vocal cord
disorder carries the speaker and the output level is increased. Therefore, even in the case of a
vocal-card disordered person who can only produce extremely small voices, the output level of
the speaker can be increased, and ordinary conversation can be performed.
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