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JPH02253799

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DESCRIPTION JPH02253799
[0001]
[Industrial field of application 1] The present invention relates to an acoustic device which allows
only people in a specific II range to hear sound. [The prior art 1st generation has a wide variety
of sounds, such as the noise of trains and cars, from the noise of trains and cars, etc. I hope that
everyone in the train and rate noise should be small, but the sound of the stereo and television in
the next room is nothing more than noise from others, but I would like to come actively Because
there is a person who does it, the result is somehow derived. 1 The noise of the rij people has to
wait until the technological development for noise reduction, but in the latter case it can be
reduced by the user's slight attention. For example, it is sufficient to reduce the volume of the
stereo or television, but this requires the user to use the device without being satisfied with the
volume point. 0 For example, the information platform of the station platform is basically Is only
heard by the people at home, it is only noise to the people outside the station, and in this case it
is not possible to turn the volume down, it is clear in the east to the people at the end of the
home You need a minimum volume to make it sound good. [Problem 1 to be solved by the
invention is that the sound spreads to four-way power, so there is a problem that in the existing
speaker, the sound is transmitted to the unnecessary direction. The present invention has been
made in view of the problems of the prior art described above, and the object of the present
invention is to radiate sound only in a specific area and make it impossible for people in other
places to hear the sound. To provide an acoustic device. [Means for Solving the Problems 1
Sound of the Present Invention! If is characterized in that the parametric speaker 1 is installed so
that sound waves are emitted only in a specific area, and the above object of the present
invention can be achieved by adopting this configuration. It has been achieved. [Action 1] The
parametric speaker 1 directivityally sends the rattling sound to a specific area so that it can not
be heard as noise except in a specific area. Embodiment 1 The present invention will be
described in detail based on embodiments. FIG. 1 shows an example in which the puff metric
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speaker 1 is used as a voice response device of a home automatic measuring device (HA device).
A home automechanic device is a device that automatically performs all the facilities in a home,
for example, putting hot water in a bath, opening and closing windows and curtains, locking
doors, and also forgetting to use electricity or paper. , Etc. * In other words, it is a device that
automatically performs the operation mode and check function of the equipment in the garden
according to the human command and informs the human about the result 1, the operation of
this home automatic device 1 I11!
A voice response device 3 is provided at 2 and a puff metric speaker 1 is provided as a speaker
for this voice response 1 [ff3. Here, the principle of the puff metric speaker 1 will be described.
As a directional speaker to send out to a specific area with directivity of sound, ultrasonic waves
with strong directivity are used. As its principle is shown in FIG. 2, two sounds f ++ fi with slightly
different frequencies are shown in FIG. At the same time, the two sounds f + * fz interfere in the
air, and as shown in Fig. 2 (b), the sound with the sum and difference frequency of the two
frequencies is newly added. In this case, two sounds f, f, and so on are used and an ultrasonic
wave that can not be heard by a person is set so that the sound f, −42 of the frequency
difference between these two sounds f + = f * becomes an audible sound It is possible to direct
the audible sound generated in the air to people in a specific area, and such a phenomenon is
called “nonlinear interaction J or“ nonlinear puffmetric action ”of the sound wave. Of the
medium called air to Utilizes the linearity ", is referred to as Pafume trick speaker. Therefore,
when the operation of the home automa- tion device is operated using the voice response device
lt3, when the voice response device 3 is operated, the voice response device 3 is provided with a
voice response from the puff metric speaker 1 , Confirming the procedure of operation, the
operation of home automesilane equipment, I! In this case, the voice response device 3 of the
home automatic measuring device is only at a specific area of the sound wave radiated from the
puff metric speaker 1 (that is, the audible sound reproduction sound field 4). The response sound
from the parametric speaker 1 provided in can be heard, and the response sound can not be
heard in places other than the specific area. Therefore, the operation device of the home
automesilane device is installed in multiple places such as the kitchen, living room, and bedroom
so that it can be used immediately! ! It is normal to be done. In the past, the operation surface of
the operation device 2 ends with recognition even in dark places such as at night, etc.) A switch
lamp is built in, or a CRT is used. It is often the case that a main plug is in use. In such a case, the
operating gear to the bedroom! It is convenient to set 12 but it is too bright on the CRT screen to
sleep, but you can get a glimpse of eyes, or it is not clear which switch lamp is lit with a series of
switch lamps If you are not a good person with good eyesight or good eyesight, you have to wear
glasses, and a voice response device to solve these problems!
Although t2 may be provided, it may be heard by an ordinary speaker even by a person who is
not operating it, and there is a fear that he / she may wake up a sleeping person in the middle of
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the night. However, as in the present invention, the voice response provided to the operating
device 2 of the home automatic device! it! When the parametric speaker 1 is used as the
speaker 3, only the person who operates it can be made to hear the response by the voice due to
the sharp directivity of the puff metric speaker 1, and the problem described above is solved. FIG.
3 shows another embodiment of the present invention. In this embodiment, a puff 7F rick
speaker 1 is provided as a speaker of the voice response unit 6 in a cash dispenser 5 (including a
cash dispenser) of a bank. And an audible sound can be heard only in a specific area (audio
sound reproduction sound field 4) in front of the cash withdrawal machine 5 and can not be
heard by the next person, for example, “the balance is insufficient. It is possible to maintain
buffability by making it possible for only one person to hear a response sound that you do not
want others to hear. FIG. 4 shows still another embodiment of the present invention. In this
embodiment, an embodiment in which the parametric speaker 1 is provided as the speaker of the
entrance interphone 7 is shown, and the conversation content with the visitor by the interphone
is heard only in the specific area (the audible sound reproduction sound field 4) Not only that, it
will be a protection of bouhaberia and a noise prevention to the neighborhood. FIG. 5 shows still
another embodiment of the present invention. In this example, the phone W! An embodiment is
shown in which the puff metric speaker 1 is provided as a speaker for emitting the ringing tone
of 18, and the ringing tone of the telephone set 8 is heard only in the specific area (the audible
sound reproduction sound field 4) to help prevent the noise around it. It is. 6 (a) (b) (e) show
further another embodiment of the present invention. In this embodiment, the parametric
speaker 1 is provided as an extraction power of the home electric appliance 9 having a speaker
such as the television 9a, the radio 9b, the stereo 9c, etc. It is possible that only the person who is
in a specific area ('iTT audio reproduction sound field 4) can enjoy the sound output from the
above-mentioned house N product 9 without needing the earphones. The person who was
listening to the audio of the home appliance 9 by the earphone while being laid down is released
from the earphone, and the work such as ironing does not have to worry about the earphone (the
work will be finished and the noise to others It also helps prevent.
In this case, the parametric speaker 1 may not be provided as a two-to-stouspy force of the home
appliance 9 (a puff metric speaker 1 may be provided directly as a loudspeaker of the home
appliance 9). FIG. 7 shows another embodiment of the present invention. That is, in the past, a
reporter such as a television, an announcer or the like stands in front of the camera as an
earphone to prevent howling. Therefore, in this embodiment, the parametric speaker 1 is
provided as a monitor sound generator (as a speaker of 2o so that the monitor sound of the
broadcast is directed to the reporter's ear and the announcer's ear and no sound enters the
microphone 10). The annoyingness of the earphones is eliminated (the accident related to the
earphones is eliminated during the broadcast so that the viewer can enjoy the program
comfortably. FIG. 8 shows an embodiment in which a parametric speaker 1 is provided as a part
of the voice response device 12 of the automatic sale W 111. In this embodiment, the audible
sound reproduction sound field 4 is set such that only the person standing in front of the
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vending machine 11 and using the vending machine can hear the voice response of the vending
machine 11, People can not hear it. In FIG. 9, a puff / one cylinder 7 is provided as a speaker of
the greeting device 13 provided at the entrance 15 of the shop. In this embodiment, a human
body detection sensor for detecting the entrance and exit of a person at the entrance 15 of the
shop 14 and the greeting device 13 are linked. The human body detection sensor 14 uses, for
example, two phototubes to determine whether a person enters or leaves, and detects a person
who enters or leaves the store 9015. When the human body detection sensor 14 detects a
person at the entrance 15, this Interlocking greeting dress! ! ! As the 13 parametric speakers 1
can only be heard by the customers who enter and leave the entrance 15, they say "Thank you,"
or "I'm welcome". In this way, the noise is not heard by a completely unrelated person, but only
by the guests entering and leaving the entrance, so that the guests feel as if they are being told to
themselves and not only noise prevention but also sincerity to the guests. Will make you feel. The
alarm placed in the bedroom 17 in the Pkio diagram! An example in which the puff metric
speaker 1 is used as the speaker of the L unit 18 is shown. In other words, if you are sleeping in
the same room, or if you are sleeping in the next room, you will hear the sound of the alarm
clock even if you only have the alarm clock turned on trying to wake up. The alarm sound can be
heard only by the person sleeping in the audible sound reproduction sound field 4 of the puff
nodric speaker 1 by using the puff metric speaker 1 as the speaker of the alarm lamp W 118, but
the audible sound reproduction sound field It can not be heard by people sleeping in places other
than 4, and there is no way to wake up other people.
Here, if the direction control device of the audible sound reproduction sound field 4 is provided
to make the audible sound reproduction sound field 4 variable, for example, in the case of a
couple sleeping in two, the wife is 7 o'clock, the husband is 8 It is also possible to listen to the
sound at a time and so on, and it is also possible to listen to music only to one person in the
bedtime, providing a comfortable life without having to put anything on the body such as
earphones. It will end. In this embodiment, the puff metric speaker 1 is disposed on the bed 19.
However, the puff metric speaker 1 may be provided on a wall, ceiling, storage furniture,
decoration '), fi or the like, or provided on an alarm clock. Is also good. In addition, a parametric
speaker can be used as a speaker of the acoustic apparatus in an apparatus, the various place
where it is preferable to listen only to a specific area | region besides the said each Example.
[Effect 1 of the Invention] In the present invention, as described above, the puff metric speaker is
installed so that the sound wave is emitted to only a specific 11 castles. It is so light that people
in the area can not hear the sound, and has a noise prevention effect.
[0002]
Brief description of the drawings
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[0003]
Fig. 1 is a schematic perspective view of the operation device of the home automatic transfer
device according to one embodiment of the present invention, Fig. 2 (a) (&) (e) is a principle
diagram of a puff metric speaker, and Fig. 3 is cash Fig. 4 is a schematic perspective view of an
automatic teller machine, Fig. 4 is a schematic perspective view of a front door interphone, Fig. 5
is a perspective view of a telephone, and Fig. 6 (aH &) (e) is an outline of each example of the
same house 'I11 product. 7 is a schematic explanatory view of the monitor sound generating
device of the above, FIG. 8 is a schematic perspective view of a vending machine, FIG. 9 is a
perspective view of a store entrance provided with a greeting device, 110 is a bedroom 1 is a
perspective view showing an example of, where l is a parametric speaker.
Agent Patent Attorney Stone 1) Manager 7 Figure 1 Figure 1 ... Barametrics Beka Figure 3 Figure
4 Figure 7 Figure 8
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