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DESCRIPTION JPH03114319

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DESCRIPTION JPH03114319
[0001]
Field of the invention The invention relates to a handset set according to the preamble of claim 1.
The prior art handset sets have the problem of enabling communication over distance. The
tolerance of this type of set substantially depends on how much it would limit the wearer's
normal free movement. A handset set is known which consists essentially of two pinnacle
capsules and a lip microphone connected via a band. The auricle capsule and the integrated
element for the listening function contained therein are advantageously in communication,
whether it is wired or wireless, as far as possible without being disturbed by ambient noise It can
be configured as a hearing protection capsule. The speech transmission function is performed in
this type of handset set according to the prior art with a noise-compensated, dynamic lip
microphone, by means of which the ambient noise is assumed, provided that it operates as
specified. Is largely suppressed. Apart from this, putting the microphone in front of the area of
the lips in this way may be undesirable for the wearer. For example, considering the use of a onepiece helmet or protective mask, it is not possible to use lip microphones if their use is absolutely
necessary. Furthermore, it is recognized that the lip microphone has the following disadvantages.
That is, for example, when it should be set to be ready for transmission after the transmission
pause period, fine positioning of the microphone has to be performed, and the positioning
accuracy of the microphone directly affects the transmission quality. In order to eliminate this
problem, so-called laryngeal microphones have been used instead of lip microphones. Certainly
with the last mentioned microphone there is a certain improvement over the lip microphone in
terms of transmission quality when there is a loud noise effect, but for positioning and fixing in
the correct position the microphone is fixed to the band or Regardless of whether it is stored in
the neck band, there are not a few problems. Besides this point, known laryngeal microphones
place a bone-conduction microphone in the area of the temporal area (Os Le + aporale) and take
out the speech there, in order to eliminate this problem of not being able to reproduce the tone
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of the individual Suggestions have been made. A set of this kind is described, for example, in DE
22 30 637 A1.
This set is in the area of the ear, which essentially consists of a receiver and a cover integral in
which a microphone acting on the bone conduction sound is present. The cover integral itself is
formed as a ring-shaped pad, and the ring can be hung around one ear. The microphone acting
on the bone guide, which is preferably a mobile coil gradient microphone, is excited in the
vicinity of the bone of the temporomandibular joint, ie the bone of the shepherd. The first
drawback of this proposal is that the use of mobile coil gradient microphones, which themselves
have a large volume, reduces the efficiency and the representation of the reproduced voice
already low with regard to acoustic characteristics, and hence a satisfactory reproduction of the
voice Usually, additional assistance is required when trying to Problems to be solved by the
invention Another drawback in this set, and in all other known handset sets, is that they are not
"helmet-wearable". That is, these handset sets can not be used simultaneously with a snug and
individually tailored helmet. Furthermore, it is recognized that all known handset sets are
unusable anyway, as security or accident handling units or rescue units can only be introduced
with the aid of a breathing assistance device or a respirator mask. In such a case, efficient
coordination of staff to the input team and provision of protective measures are not guaranteed
as communication base is insufficient or not present. Certainly, it is conceivable to incorporate
the handset element in each head protector or helmet. However, the cost required for this is very
large. This is because, regardless of what personnel use, means must be provided for this of the
handset set individually coordinated within the helmet for the entire team. Furthermore, each
change of personnel must be able to be accurately grasped systematically. The reason is that
either a new helmet is required for new staff or the existing helmet must be aligned not only with
respect to head alignment but also with respect to the position of the handset element. In that
case, once the helmet has been changed or replaced, for example on the basis of the new
ergonomics, this will also affect the handset elements incorporated into the helmet. The present
invention takes measures against this point.
The object of the invention as claimed in the claims is to provide a handset set which can be
worn "helmet-wearable", ie under any helmet that is snug. Furthermore, the object of the
invention is to maximize the transmission quality, even when protective masks are to be worn.
According to the invention, this object is achieved by the features of claim 1. An important
advantage of the present invention is that the handset set of the present invention has a flat,
head-in-the-head shape that does not positionally relate to the shape of the head in the helmet.
Even in the area of the ear that simultaneously acts as a receiver and also as a microphone, the
handset set of the invention maintains its inherent characteristics in such a way that the receiver
and the microphone itself do not project beyond the plane of the wearer's pinna. Another
important advantage of the present invention is that the handset element can be guided into the
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proximity of the pinna in a correct and stable manner on the basis of the same movement when
mounting the handset set. Advantageous embodiments of the invention are described in the
further claims. The invention will now be described in detail by way of example with reference to
the drawing. All elements not necessary for a direct understanding of the present invention have
been omitted. The same elements are given the same reference numerals in the different figures.
In FIG. 1, the whole handset set is illustrated. The set comprises a headband 11, a receiver /
microphone unit 2, a receiver unit 3 and a controller 4. The headband 11 is cut from the whole
using a laser beam which is punched or controlled from a thin elastic steel plate. The geometry of
the headband 11 is characterized in that it has two narrow end portions 11a on the end side and
one central portion 11b following them. After separating the shape of the headband from the
whole, it is curved in such a way that a corresponding spring force acts in accordance with the
shape of the central head. At that time, it is important that this curvature does not cause plastic
deformation of the thin sheet material. This ensures that the headband 11 can be perfectly
matched to the shape of the respective head. The double part 11b is coated with a soft material,
for example a thin leather belt, for reasons of comfort. It must then be ensured that the finished
flat shape of the headband 11 is never lost.
The cable guide 13 extends along one portion of the double portion 11b. It should be taken into
account that the cable 35 of the receiver unit 3 is guided flat along one part of the 21a part 11b.
The narrow end portion 11 a is used to receive the receiver / microphone unit 2 or the receiver
unit 3. The receptacles 36 have to be formed in such a way that both units 2.3 can be moved
along the narrow part 11a over a predetermined adhesion friction. A guide 36 is provided on the
back of each unit 2.3 for this purpose, and in this connection the narrow portion 11a provides a
guide having a stopper function. The necessary stop function for the narrow part 11a as a
support rail of each unit 2.3 can be realized, for example, by a disc spring which is
accommodated in the guide 36 and can not be seen from the figure. This disc spring acts on the
side edge of the narrow portion 11a. The ultimate purpose of this measure is that upon mounting
of the headband 11, the two units, i.e. the receiver / microphone unit 2 and the receiver unit 3,
can be guided to a given insertion location in the same movement sequence. The optimum end
position is then predetermined by the curved ear brackets 26.31 of the respective unit 2.3 such
that the ear brackets 26.31 are located at the root of the ear. The head-side curve of the ear
bracket 26.31 serves to locate the position and thereby assists in manually positioning the ear
bracket 26.31 each time in the area of the root of the ear when mounting the handset set There
is no need. This ear bracket 26.31 is provided with various types of pads 34.26a for reasons of
comfort. The ear bracket 31 has a simple end-side protective cap corresponding to the light base
32 provided thereon while the positioning action has to be carried out on the relatively heavy
base 21 The ear bracket 26 preferably has an integrated pad 26a of foam rubber material. Of
course, other types of pads and other configurations may be employed to meet each side
requirement. Also, it should be taken into consideration that the respective ear brackets 2631 do
not generate any pressure points during the fitting of the protective cap and the support of the
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cap. The narrow part 11a is provided at the end with a stop member 14 used as a restraint for
the movable unit 2.3.
One substrate 32 supports only the receiver 33 which is not visible in its entirety. Of course, this
base 32 can also be formed correspondingly to the base 21 which is determined for the other
tool. That is, the microphone 23 can be expanded to be provided. The cable 35 connected to the
receiver 33 is led to the other unit 2 as described above. Where necessary, in addition to the
cable line guide 13, a band member 35 a can be provided which ties the cable 35 of the receiver
33 completely to the headband 11. Another substrate 21 belonging to the receiver / microphone
unit 2 is a thin tongue-like structure. It supports a bone conduction microphone 23 in addition to
the receiver 22. The configuration of the microphone 23 will be described with reference to FIG.
With regard to the positioning of the receiver 22 and the microphone 23, the latter is determined
to reduce bone conduction noise in the area of the cranial side of the outer bone of the ear canal
(Os tympanicus) so that the former comes to the inner ear . Here, I would like to confirm that the
indirect propagation of voice is considered as a problem. However, since this voice is output
modulated according to the timbre, relatively good quality can be expected in connection with an
efficient microphone. That is, these recordings come from the oral cavity. In the oral cavity, the
recorded sound is finally output-deformed according to the timbre, and from there the recorded
sound travels through the cranial ear canal to the auditory tissue, ie to the cranial outlet of the
bone of the ear canal. However, on the other hand, acoustics are strongly attenuated on the way
to the ear canal on the ear side and some are also distorted, thus making it possible in this case
to disable the dual capability of the handset set. Besides facing the decoupling problem, the
reproduction of the recording with the resonators arranged in the ear can have unsatisfactory
results. Crimping forces on the units 2 and 3, in particular the receivers 22.33 and the
microphone 23, which occur as a result of wearing the helmet in the head with the handset set
worn, additionally assist in the positioning action So it works in favor. The cable 35 first connects
the two receivers 22.33 to one another. The common receiver cable 35 coming out of the
receiver 22 is connected to the microphone cable 24 coming out of one or more microphones 23
to become a common transmission cable 25 which is connected to it via the ear bracket 26 The
terminal 27 is terminated.
This cable terminal 27 is furthermore led as a 7-relexable cable 27a of various lengths, which
ends in a plug 28 for the control device 4. The control device 4 is configured such that it can be
set into operation via different controls. That is, the control unit transitions to the receive state
when: manually via the transmit key 47, also referred to as a PTT switch. Via a magnetic switch
not visible in the figure switching from the outside on the basis of one magnetic pulse. -Via a
priority channel. The switching will be described based on FIG. Via Vox switch 48 which can be
one conventional on-off switch. On the outer surface of the control unit 4 there is a further sound
source 42 (see front) housing the knee plug 28 where the next element is visible (see forward)
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one of the external sound received via the microphone 45a, 46b, i.e. The adjustment knob 43 for
the intensity, where only one microphone is visible from the control 4 shown, the other
microphone is on the opposite side and is therefore not visible. A battery monitoring lamp 45
which emits a short light when the control device 4 can be supported, for example, on a belt, for
a short time when it is inserted, and flashes when it is discharged to a predetermined level. A
cable that has an associated plug 41a as a terminal for a wireless device that can be fixedly hung
around the body, which can then be accessed by means of a separate holder 49 ° which can
access the battery contained therein once it has been removed. The configuration described
above at 41 ° eliminates the need to treat the wireless device as a handy-to-talk wireless device.
By pushing the wireless device out of the field of view, potential hazards have been eliminated.
Because of the high frequency, the retina of the eye may be injured when using the wireless
device as a handy-to-talk wireless device already in the ultra high frequency region above 400
MHz. FIG. 2 shows the self-wearing receiver / microphone unit 5 expanded by the manual
transmission key (PTT switch) 51 compared to the receiver / microphone unit 2 as the handset
set shown in FIG. It is done. Of course, this unit 5 can be accommodated as it is in the handset set
shown in FIG. 1, the transmission operation being taken over by the control unit 4. In FIG. 3, the
handset set in the state of being worn on the body is shown, that is, the state where the handset
set is attached to the head of the wearer.
The configuration of the electronic module in the control device 4 is shown in FIG. In this
diagram the microphone 23, the receiver 22.33 and the receiving elements 46a, 46b for ambient
noise are shown. When controlled in the communication mode by the wearer of the handset set
via the microphone 23 or from the outside via the receiver 22.33, the electronic circuit is
directed to the two receiving elements 46a, 46 directed outwards. Let b be set to inactive at the
acoustic level without delay. Ambient noise to the receivers 22, 33 is blocked at this point so that
wired or wireless interference free communication is possible. The limiter / 1 slessor / expan-guo
61a, 61 bit located in the wiring leading to the receiver 22.33 is blocked at the time of
communication priority. The limiter / compressor / expander 61a, 61b each have an adjusting
knob 43 for setting the sound intensity in the receiver 22.33. A headphone amplifier 62 is
further provided in front of these receivers 22.23. At the time of communication priority, the
reception channel 63 and the low frequency signal channel 64 for the incoming signal are
established. The logic circuit 65 is used on the one hand for the external transmission operation
and on the other hand on the inside of the module for low frequency control of the listening
channel. In both cases, it is clear from the diagram of FIG. 4 that active control of the
communication priority causes one signal to block the blocking of the two receiving elements
46a, 46b, ie the blocking of the ambient noise to the receiver 2233. It will be. Various amplifiers
are used to maintain voice monitoring or listening. These amplifiers lead internal pulses from the
microphone 23 to the receiver 22.33. The priority communication amplifier is switched after 0.52 s, for example after 0.5-2 s, whether it is through the receiving channel 63 or the digital signal
arriving in parallel, as well as through the listening channel in the absence of a signal, and thus
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the receiving element 46a and 46b are set to be in a state of receiving ambient noise again. The
limiters / compressors / expanders 61a, 61b ensure that the intensity of the incoming sound
waves, which has been set once via the adjustment knob 43, is maintained. Advantageously, it
does not exceed 80 d here. Here, the manual generation of the logic level signal takes place in a
conventional manner via the transmission switch 47 accommodated in the control unit 4 which
also actively controls the listening channel.
This corresponds to the switch 51 in FIG. On the other hand, when it is desired to switch to voice
operation, this takes place via the Vox switch 48 bridging the manual transmission switch 47. It
is also possible to provide a magnetic switch 66 which enables communication when it is actively
controlled. This last-mentioned circuit is particularly suitable when the wearer's hand is
protected, for example by means of thick gloves, and also when switching via a feed operation is
inconvenient. The energy supply is based on the battery 45 in this circuit. Redundant safety
measures are provided in conjunction with the two limiters / compressors / expanders 61a, 61b.
If, for example, a failure occurs or the sound level adjustment of the incoming sound wave fails,
for example, a diode acts instantaneously, which always cuts an excessively large sound level to,
for example, up to 80 dB, Protect your hearing. FIG. 5 shows a bone conduction microphone
consisting of an object 23a1 impedance converter 23f filter / equalizer 23g and a contact
capsule 23c forming a piezoelectric resonator 23b1 mass. The elements described above are
connected to one another as indicated by the line 23d. The contact capsule 23c must have a very
large vibrational capacity, and the resonator 23b located below it should be optimally excited by
the bone conduction sound coming there. The use of a slow response and / or absorbing contact
capsule 23c in this context may work disadvantageously. The resonator 23b is located in a
"sandwich type" between the contact capsule 23c and the damping ring 23e. Piezoelectric
resonators 23b, as is the case, for example, in the case of hard copper alloys, in the form of an
object 23a which has a low absorption capacity for vibrations, preferably forms a mass of a
dense material. The connection acts on the oscillation amplitude of the resonator 23b, which in
turn leads to a sharper resonance, which leads to an alteration of the reproduction quality. Also
provided in the mass-forming object 23a are an impedance transformer 23f and a filter /
equalizer 23g, which are connected to the resonator 23b via a voltage via a line 23d, and It helps
to further improve the qualitative efficiency in the transmission of voice in the direction in which
the speech intelligibility is improved. That is, the impedance converter 23f performs impedance
matching to the post-connected wireless device, while the filter / equalizer 23g is effective based
on the presence of speech.
Effect of the Invention The handset set of the present invention can be worn under a helmet
fitted to the head and has the feature that transmission quality does not deteriorate even when
wearing a protective mask. There is.
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[0002]
Brief description of the drawings
[0003]
FIG. 1 is a schematic view showing the whole handset set of the present invention and a control
device belonging thereto, FIG. 2 is a schematic view showing a receiver / microphone unit as an
independent part, and FIG. Fig. 4 is a block diagram of the electronic circuit of the control device,
and Fig. 5 is a schematic sectional view schematically showing a bone conduction microphone. It
is.
2 ... receiver / microphone unit, receiver unit, 4 ... control device 1.11 ° a, 1 l b, 12-head band,
22 ° ... receiver, 23 ... 7 microphones, 26 ° · · Ear bracket, 47 j 1 · · · Transmission switch · · ·
Vox switch 3 · · 1318 procedure correction book (type)% formula% display of the case name of
the invention year patent application patent number 77623 handset set correction Relationship
with the Case Case Patent Applicant Name Calculation Name Ettovein Zelier (1 other person)
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