JP2008283874A - Prevention device for coming flying of birds - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prevention device for coming flying of birds which can solve the problems of conventional techniques, wherein its repelling sounds are unnatural noise to persons and give sense of incongruity, and which emits repelling sounds that are not felt as being relatively displeasing, and moreover is not an unnatural sound. <P>SOLUTION: The prevention device for coming flying of birds which records, as repelling sound, the first sound sensed by a group of birds to be repelled to simultaneously fly away, and then emits the recorded sound from a loudspeaker on the basis of a signal from the sensor to repel a group of the birds, when it is detected by the sensor that a group of the birds gather in a prescribed area. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bird flight prevention device, and more particularly to a technique for preventing bird flight to a rooftop or a predetermined area of an outdoor facility.

It is most important for birds to find and eat food in order to live. This is the bird's instinct.
In recent years, we know well that there are no natural enemies on the rooftops of buildings, roofs of houses, shrines and stations, factories, gardens, etc., especially on our rooftops and verandas. As a result of flying and making nests, the damage caused by pigeons has increased rapidly. This dung damage has the problem that the aesthetics of the facility is impaired and various diseases occur through the dung, and pigeons are pathogenic bacteria that cause allergies, severe damage, or risk of death. And has the problem of transmitting parasites.
As a conventional example, an ultrasonic wave having a constant frequency is emitted from the ultrasonic radiation unit until a bird flies, and a high-intensity beam blinking from the high-intensity beam radiation unit. When a bird's flight is detected by an infrared sensor, a distress call / alarm call whose pattern is randomly changed and a pseudo-voice call of a natural enemy cry are emitted from the call radiation unit at a predetermined cycle, while the ultrasonic wave is also changed. There is a bird flying prevention device (see, for example, Patent Document 1).
JP 2002-159257 A (refer to claims, detailed description of the invention, and FIGS. 1 to 3)

In the prior art, the repelling sound is noisy to humans and is unnatural and uncomfortable.
The present invention solves the above-described problems of the prior art and finds a repelling sound that does not feel as a relatively unpleasant sound and is not unnatural. The present invention has been found as a result of various studies that the first feather sound that flies all together in a group of birds (for example, pigeons) that are present at the spot is effective as a repelling sound.
Birds are said to have learning ability. This is to experience and learn dangerous places and non-dangerous places, and it is expressed as “learning birds”. When the sensor detects this, it emits a repelling sound, which causes the bird to dissipate by hearing one to several degrees of repelling sound. That is, an object of the present invention is to provide a bird flying prevention device that prevents the flying of birds by learning this avoidance sound in an effective direction.

A first invention of the present invention for solving the above-mentioned problems is a bird flight prevention device as described in claim 1 and is as follows.
The birds that form the flock that you want to repel as a repellent sound feel dangerous, record the first sound that flies all at once, and if the sensor detects that the flocking birds have gathered in a predetermined area, the recording from the sensor The sound is generated from the sound generator to repel the flock of birds.

A second invention of the present invention for solving the above-mentioned problems is a bird flight prevention device as described in claim 2 and is as follows.
The birds that make a group to avoid as a repelling sound feel dangerous, record the first sound that flies all at once, analyze this sound, artificially create a frequency band sound similar to the analyzed sound, this artificial When a bird that is swarming with a sensor detects that it has gathered in a predetermined area, the signal from that sensor is used to generate sound from the recorded sound generator. The structure is to repel the flocking birds.

A third invention of the present invention for solving the above-mentioned problems is a bird flight prevention device as described in claim 3, which is as follows.
It is the structure which uses the bird to repel as described in Claim 1 or Claim 2 as a pigeon.

Since the bird flying prevention apparatus according to the present invention is configured as described above, the following effects are achieved.
(1) A flock of birds that do not feel as relatively unpleasant sounds felt dangerous and found that the first feather sound that flies all at once was found to be able to prevent flying.
(2) Swarming pigeons feel dangerous and take off all at once. Record the sounds at this time, record 11 types, and play this sound source at intervals of 10 to 60 seconds. When the pigeon reaction was observed, the repellent rate was high at 99% within the test time of 2 hours.

  The birds that make a repel as a repelling sound feel dangerous, record the first sound that flies all at once, and if the sensor detects that the flocking birds have gathered in a predetermined area, the recording from the sensor This is a bird flight prevention device that makes a sound generated from a voice generator repel a flock of birds.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a sketch of a test site prepared to confirm the repelling sound of a pigeon, which is a specific embodiment of the present invention, and FIG. 2 uses the sound when the pigeons of the present invention are taken off all at once. The pigeons are wary of the actual sound source when they were tested, and the bait 30 cm in front of the sound source, collecting the pigeons, and sending out the first wing sound when they feel dangerous from the sound source and take off all at once. It is the test method figure for taking the data which stopped gathering to eat after that.

The present invention has sought to ensure the repellent nature of flocks of birds without causing discomfort to humans.
And it was found that birds that make a flock recognize that the sound of a fellow's flapping is also a warning sound, and as a result of confirming the repellency in a test based on this, it was found that birds have high repellency. is there.
The birds that make up this flock have the habit of flying other birds at the same time, like a conditional reflection, when one bird flies, and the sound of the birds flying is a natural sound that can be heard if the birds are flying. Therefore, since it does not feel noise to people, it can be used in residential areas.
On the other hand, conventional avoidance sounds are secondary sounds such as explosion sounds, screaming sounds, threatening sounds, and the like, which are unpleasant to people.

First, recording of repelling sound for the pigeon of the present invention will be described.
The sound was recorded as “patter” at this time, which flew all at once by feeding the pigeons gathered in front of the microphone. This sound was slightly different, and 11 kinds of sounds were recorded for 3 seconds each, and 1 to 11 kinds of sounds were recorded at intervals of 10 seconds to a maximum of 60 seconds.
Analyzing the sound of the “patter” that flies all at once in this recorded pigeon, the first one is a pulse-like “patter” that is distributed from around the frequency 0 to around 24000 Hz, which is the ultrasonic region. The second was “Hyung Hyun” where the sound pressure is low and the fundamental wave around 750 Hz and the second harmonic around 1500 Hz are strongly recorded.
Artificial creation of the first “patter” is as follows. The connection time is 0.013 to 0.018 seconds for both the sound of banging with a fan and the sound of banging with a hand. However, the distribution of frequency components is different.
In the fan, it is distributed uniformly from 700 Hz to 20000 Hz below, and the portion with a tail is around 4000 Hz.
By hand, there is no frequency component below 1000 Hz, a very strong frequency component is distributed at 1500 to 5000 Hz, and the tailed portion is around 2200 Hz.
In the feather sound, the frequency component in the vicinity of 1000 to 2500 Hz is weak, the frequency component in the vicinity of 4000 to 10000 Hz is very strong, and the portion with a tail is around 4000 Hz.
From the above, although the properties are clearly different by hand, it can be said that if the specific frequency band is attenuated among the frequency components of the fan, it is very similar to the sound of a feather.
In addition, the “patter” wing sound is about 0.12 to 0.15 seconds when the interval between each signal is counted from one, and the interval between each signal of the fan fan is 0.09. It is about 0.12 seconds, which is slightly shorter than the wing sound but close to the value.
From the above, it was found that if the fan fan sound was processed, it would be possible to reproduce a pseudo “patter” feather sound.
In addition, the hum sound “Hyun Hyung” can be confirmed to have periodic frequency components in the vicinity of 750 Hz and 1500 Hz. This frequency component was recorded at intervals of 0.12 to 0.15 seconds with a transition from 700 to 800 Hz for the fundamental wave and 1400 to 1600 Hz for the second harmonic in about 0.07 seconds.

  As described above, the sound of “patter” is effective as a repelling sound, but the effect as a repelling sound can also be achieved by combining the wing sound “Hyunghyun” with this. found.

Next, the test results of the repelling test using voices that flew all of the pigeons together will be described.
As a sample, 11 kinds of fluttering sounds of Dobato are recorded for 3 seconds each, and the interval between 1 to 11 sounds is 10 seconds to a maximum of 60 seconds. This is a recording of the sound when you take off all at once. The sound is slightly different.
In the test method, as shown in FIG. 2, bait 2 is spread in front of sound source 3 (distance 30 cm), and dove is collected. And the sound source 3 (1-11 types) of a sample is flowed and the reaction of Dobato is observed.
At this time, the number of repelling reaction pigeons (the number of individuals who flew away when sending sound source 3 or tried to escape with the back), the number of non-reacting individuals (even if sending sound source 3) Individuals who continue to eat, or who do not escape even if they stop eating), complete repelling individuals (number of individuals who are alerted by sending sound source 3 and are no longer gathered for food 2) The data was taken.
As a result, in the first test (Table 1), the second and fourth to eleventh sound sources showed a repellent reaction rate of 100%. In the second time (Table 2), the first and fourth sound sources showed a repellent reaction rate of 100%.
Therefore, the 4th to 11th sound sources showed 100% avoidance reaction. The repelling rate of 100% was the ninth and subsequent times in both the first and second tests.

  The above analysis results are based on the results report analyzed by the Acoustical Research Institute of Japan.

As a whole, we have found that it is highly likely that it is a kind of warning sound because nearby Dobats will fly all at once by sending out the flapping sound of Dobato. Since changes are seen depending on the type of sound, volume, etc., it will be possible to develop a repelling sound by analyzing many sound sources and synthesizing other distress calls. In addition, since the repelling rate can be 100% due to the learning effect, it is necessary to explore the learning power of Dobato.
In the future, it will be necessary to confirm the reaction with other sounds (applause, fan-patter sounds, etc.).

Here, how to prevent the pigeons from flying using the repellent sound as described above will be described in more detail. As shown in FIG. 1, the bait 2 is placed at a position 2 m ahead of the repellent sound speaker 1. A sensor reacts to a pigeon that has come and flies, and a repellent sound is generated from the repellent sound generator 1 from the speaker by this detection signal.
By doing so, it was confirmed that within 2 hours, the repellent rate was 99%, which was very high.
In other words, it has been found that the sound of “patter” produced when the pigeons fly all at once is effective as a repelling sound for the pigeons.
Various sensors (such as an infrared sensor) can be used as long as the sensor can send a signal for operating the repellent sound generator 1 by detecting the flying of a pigeon.

Next, analysis results for other birds are shown.
In the case of a crow, flapping is gently attenuated to about 18000 Hz with a peak at about 1000 Hz. Moreover, the crow was able to confirm the cry about 1.3 seconds after the flapping sound began.
In the case of sparrows, a clear cry can be confirmed immediately before the flapping sound is confirmed, and the flapping sound attenuates up and down in frequency with a peak at around 12000 Hz.
In the case of a starling, a cry can be confirmed about 1.1 seconds after the start of the flapping sound, and although the peak is different from around 3500 Hz, the distribution characteristics of the frequency components of the crow are similar.
In the case of starlings, the sound pressure level of the flapping sound was lower than that of crows and sparrows, so it was confirmed by amplification three times.
From the above, crows and starlings have similar characteristics of flapping sounds, and the fact that they can confirm the squealing after one second has passed since flapping, and sparrows have characteristics that are different from the two types. .

  The above analysis results are based on the results report analyzed by the Acoustical Research Institute of Japan.

  It can be applied not only to pigeons, crows, sparrows and starlings, but also to a variety of birds in particular.

It is a schematic plan view which shows the state of the test of the pigeon flying prevention apparatus of this invention. It is a schematic plan view which shows the state which records the sound emitted when it flies all at once of the pigeon flying prevention apparatus of this invention.

Explanation of symbols

1 .... repellent sound generator 2 .... bait 3 .... sound source

Claims (3)

The birds that form the flock that you want to repel as a repellent sound feel dangerous, record the first sound that flies all at once, and if the sensor detects that the flocking birds have gathered in a predetermined area, the recording from the sensor A bird flying prevention device characterized in that a sound produced by a voice generator is used to repel a flock of birds. The birds that make a group to avoid as a repelling sound feel dangerous, record the first sound that flies all at once, analyze this sound, artificially create a frequency band sound similar to the analyzed sound, this artificial When a bird that is swarming with a sensor detects that it has gathered in a predetermined area, the signal from that sensor is used to generate sound from the recorded sound generator. A bird flight prevention device characterized by repelling flocking birds. The bird flying prevention apparatus according to claim 1, wherein the repelling bird is a pigeon.

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