CN106059706A - Mixed sound recording blocker - Google Patents
Mixed sound recording blocker Download PDFInfo
- Publication number
- CN106059706A CN106059706A CN201610353691.2A CN201610353691A CN106059706A CN 106059706 A CN106059706 A CN 106059706A CN 201610353691 A CN201610353691 A CN 201610353691A CN 106059706 A CN106059706 A CN 106059706A
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- unit
- noise
- frequency
- shielding device
- signal
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/62—Jamming involving special techniques by exposing communication, processing or storing systems to electromagnetic wave radiation, e.g. causing disturbance, disruption or damage of electronic circuits, or causing external injection of faults in the information
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Noise Elimination (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a mixed sound recording blocker comprising a power unit, a control unit, a modulation unit, a noise unit, a high-frequency emission unit, a radio frequency unit, a power amplifier unit, a PTZ unit, and an electromagnetic pulse unit. The noise unit includes a white noise generator and a pink noise generator. The mixed sound recording blocker of the invention adopts ultra-low-frequency emission, the receiver of an acoustic sensor is blocked directly, so that the receiver cannot extract or restore received audio signals after saturation, and no harm is brought to the human body or the environment. An effective noise source is selected, and the noise source is modulated in multiple modulation modes so the modulated noise is irregular. An effective means of emission is adopted to meet the following requirements: the emission distance is as far as possible, the spectral coverage is as large as possible, and the saturation effect is as good as possible.
Description
Technical field
The present invention relates to monitoring or the device technique field of monitoring telecommunication, relate generally to a kind of mixing sound wave recording shielding
Device.
Background technology
Currently developing rapidly along with science and technology, electronic product universal, and the miniaturization of electronic product, individual with
And threat that public information security is subject to is the most increasing.Some lawless person is by mobile phone, recording pen or other specialty
Property stronger miniature interception facility, illegally steal individual privacy, business secret even state secret, so that individual, enterprise
Industry suffers economic loss, more even makes nation's security be on the hazard.
Present most sound pick-up outfit all gathers voice signal by acoustoelectric sensor, and the propagation of sound is one
Plant mechanical wave, propagate in atmosphere by vibration.Acoustoelectric sensor gathers signal by sensing this vibration；If
In sound pick-up outfit work process, the vibrating reed of acoustoelectric sensor is made to sense a kind of irregular similar white noise by certain device
The vibration of sound, and not heard by human ear so that sound pick-up outfit can only record a kind of noise, and people's one's voice in speech by
Thoroughly interference can not be separated；Thus it is effectively accomplished the effect of recording interference.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of new mixing sound wave recording shielding
Device, effectively can disturb sound pick-up outfit so that it is can not realize recording normally.
Technical scheme is as follows:
A kind of mixing sound wave recording shielding device, wherein, including power subsystem, control unit, modulating unit, element of noise,
High-frequency emission unit, radio frequency units, power amplifier unit, PTZ unit and electromagnetic pulse unit；Described power subsystem needs with other
Unit to be powered is connected, for needing the unit of power supply to provide power supply for other；Described control unit and element of noise defeated
Going out end to be connected with the input of modulating unit respectively, control unit is used for generating carrier signal and sending carrier signal to modulation
Unit, element of noise is used for generating noise；The outfan of described modulating unit respectively with high-frequency emission unit, less radio-frequency list
Unit, the input of power amplifier unit are connected, and noise, for carrier signal is added noise, is modulated by described modulating unit；High
Frequently transmitter unit is for receiving the waveform of modulating unit output and launching HF noise signal, and described radio frequency units is used for connecing
Receive the waveform of modulating unit output and launch less radio-frequency noise signal；The outfan of power amplifier unit respectively with PTZ unit and electricity
The input of magnetic field impulse unit is connected, and power amplifier unit sends after being used for receiving the waveform of modulating unit output and carrying out power amplification
To PTZ unit and electromagnetic pulse unit, PTZ unit is used for receiving the waveform of power amplifier unit and launching low-frequency noise signal, electromagnetism
Pulse unit is for receiving the waveform of power amplifier unit and launching electromagnetic pulse interference signal；Described element of noise includes that white noise is sent out
Raw device and pink noise generator.
Described mixing sound wave recording shielding device, wherein, control unit is single-chip microcomputer, and the carrier signal of generation includes sine
In ripple, triangular wave, square wave and narrow pulse signal one or more.
Described mixing sound wave recording shielding device, wherein, the modulation system of modulating unit includes that amplitude modulation(PAM), frequency are adjusted
One or more in system, phase-modulation.
Described mixing sound wave recording shielding device, wherein, the resonant frequency of piezoelectric ceramic transducer is located at more than 16KHz.
Described mixing sound wave recording shielding device, wherein, the dominant frequency of electromagnetic pulse unit be arranged on 10KHz～20KHz it
Between.
Described mixing sound wave recording shielding device, wherein, the radiation radius of electromagnetic pulse unit is set to 5 meters.
Beneficial effect: the present invention mixes sound wave recording shielding device and uses intrasonic to launch, and directly blocks connecing of sonic transducer
Receiving end so that it is cannot extract and recover received sound signal after saturated, and bring will not to human body and environment simultaneously
Harm.Choose effective noise source (including white noise and pink noise), noise source is used Different Modulations, after making modulation
Noise source irregular seek, and use effective radiation pattern, to reach, transmitting range is the most remote, spectral coverage is most
The requirements such as amount is big, saturation effect is the best.
Accompanying drawing explanation
Fig. 1 is the functional block diagram that the present invention mixes sound wave recording shielding device.
Fig. 2 is filter circuit figure.
Fig. 3 is the time domain waveform of white noise and pink noise.
Detailed description of the invention
The present invention provides a kind of mixing sound wave recording shielding device, for making the purpose of the present invention, technical scheme and effect more
Clear, clear and definite, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to
Explain the present invention, be not intended to limit the present invention.
Mixing sound wave provided by the present invention recording shielding device, as it is shown in figure 1, include power subsystem, control unit, modulation
Unit, element of noise, high-frequency emission unit, radio frequency units, power amplifier unit, PTZ unit (piezoelectric ceramics transducing unit) and
Electromagnetic pulse unit；The unit that described power subsystem needs power supply with other is connected, and provides electricity for other unit needing power supply
Source；Described control unit is connected with the input of modulating unit respectively with the outfan of element of noise, and control unit is used for generating
Carrier signal is also sent to modulating unit by carrier signal, and element of noise is used for generating noise；The outfan of described modulating unit
Being connected with high-frequency emission unit, radio frequency units, the input of power amplifier unit respectively, described modulating unit is for believing carrier wave
Number add noise, noise is modulated；High-frequency emission unit is used for receiving the waveform of modulating unit output and launching high frequency making an uproar
Acoustical signal, described radio frequency units is for receiving the waveform of modulating unit output and launching less radio-frequency noise signal；Power amplifier
The outfan of unit input with PTZ unit and electromagnetic pulse unit respectively is connected, and power amplifier unit is used for receiving modulating unit
The waveform of output is also sent to PTZ unit and electromagnetic pulse unit after carrying out power amplification, and PTZ unit is used for receiving power amplifier unit
Waveform and launch low-frequency noise signal, electromagnetic pulse unit is for receiving the waveform of power amplifier unit and launch electromagnetic pulse interference
Signal.Described control unit is single-chip microcomputer, can produce any one signals such as sine wave, triangular wave, square wave and narrow pulse signal.
Described element of noise includes white noise generator and pink noise generator.
Noise is divided into white noise, pink noise, blue noise etc., and the present invention mixes sound wave recording shielding device and selects to make an uproar at random
Sound is commonly called white noise as interference noise source, random noise.When interfering process power density gives timing, and white noise has
Maximum masking characteristics, its probability-distribution function is multiple normal distribution.Therefore, the most described element of noise
For white noise generating unit.For increasing the complexity of interference source, this equipment also uses pink noise.
In order to effectively utilize jamming resource, it is desirable to noise spectrum is limited in certain scope, however any
Noise source (includes that the present invention mixes the white noise that sound wave recording shielding device is selected), although its spectral range is the widest, and exactly exists
It is the lowest that the present invention mixes sound wave recording shielding device its power spectral density of desired low-frequency range.Make an uproar to obtain satisfied low frequency
Sound, can move noise frequency so that it is become the low-frequency noise started from 10Hz.
Specifically, the present invention mixes sound wave recording shielding device and uses intrasonic to launch, and directly blocks the reception of sonic transducer
End so that it is cannot extract and recover received sound signal after saturated, and bring danger will not to human body and environment simultaneously
Evil.Choose effective noise source, noise source is used Different Modulations, makes that the noise source after modulation is irregular to be sought, and adopt
Use effective radiation pattern, with reach transmitting range as far as possible remote, spectral coverage is the biggest, saturation effect is the best etc. wants
Ask.
To white noise, pink noise both noise sources use three kinds interference modulation systems: amplitude modulation(PAM), frequency modulation(PFM),
Phase-modulation, and modulation system and combinations thereof is random, irregular, make sensor saturated, the language that i.e. sonic transducer receives
Cannot extract and recover after the disturbed obstruction of tone signal.The present invention mixes noise-modulated carrier signal in sound wave recording shielding device
Any one signals such as sine wave, triangular wave, square wave and narrow pulse signal can be used.Modulation to noise uses amplitude, frequency
With the compound modulation of phase place, use three kinds of modulation systems can obtain optimal interference effect simultaneously.Interference spectrum relative to
Carrier frequency is symmetrical, and interference band is equal to the twice of modulation spectrum bandwidth.In the case of modulation depth strengthens, when amplitude limit occurring with excessive
During modulation, owing to there being combination component, interference spectrum is slightly widened.So, amplitude modulation(PAM) noise spectrum is completely by zoop
Frequency spectrum determines.
About transducer, as the piezoelectric ceramic transducer of extremely low frequency discharger, its operating frequency is preferably at low frequency
At 2KHz～5KHz, because the voice of this section of frequency band is the abundantest, but this section of frequency band part that to be also human ear most sensitive, in order to reduce
Stimulation to human body, the present invention mixes sound wave recording shielding device and the resonant frequency of piezoelectric ceramic transducer is located at more than 16KHz.
About the launching technique of interference signal, the low frequency electromagnetic pulse of employing, wherein most energy concentrates on 100KHz
Hereinafter, dominant frequency is between 10KHz～20KHz, and its emitted energy is relatively low, human body will not be produced harm.
About electromagnetic pulse, microelectronic device, the interference of device and impact, the interference threshold of electromagnetic pulse field are about
1.3KV/m, damage threshold is about 40KV/m.Low frequency electromagnetic pulse employed in this equipment, it is contemplated that to electric, electronics around
The impact of equipment, it is less that it launches power, thus radiation scope is limited, radiation radius about about 5 meters.
About the parameter of active antenna, active antenna parameter is to strengthen the radiation effect of electromagnetic impulse source, need to use antenna.
And the bandwidth of antenna is typically in difference (i.e. altofrequency and low-frequency difference of frequency corresponding to mid frequency two side draw half power points
Value).Electric field intensity and the calculating of radiant power:
The radius taking sonic transducer is 1.5mm, then radiant power P5 received on sonic transducer at distance radiation source 5m:
P5=π r2×PW=3.675 × 10-6(W)。
The undistorted maximum output voltage of sonic transducer is 4.2V, input impedance > 5M Ω, the then output work on sonic transducer
Rate Pout≤3.528×10-6(W), so having: Pout＜ P5, the radiation scope of this equipment is at about 5 meters.
To enhanced rad effect, radiant power can be improved, or suitably increase antenna length.Other spoke can also be selected
Penetrate that effect is more preferable, the broader antenna of frequency band.Choosing and the calculating of radiation field by active antenna, shows electrical dipole antenna
In the plane be perpendicular to pole axis, radiation effect is the strongest, and field intensity is zero on pole axis.And the radiant power improving antenna can
Expand radiation scope and the effect of noise jamming model machine.
The present invention mixes sound wave recording shielding device and uses 6V～24V DC source to power, and is with white noise and pink noise
As modulated signals, using sine wave, triangular wave, square wave, burst pulse as permutation and combination during carrier wave.The present invention mixes sound wave
The work process of recording shielding device is, noise (including white noise and pink noise) signal and single-chip microcomputer that element of noise produces produce
Raw carrier signal, after the hybrid modulation that modulating unit carries out amplitude modulation, frequency modulation, phase modulation, is divided into three parts；A part is given
The noise inputs end of high-frequency emission unit, i.e. radio circuit part, directly launched HF noise signal, covered by radio circuit
With signal, thus interference and block normal recording；Noise signal after part modulation is through radio frequency units (miniature low-power consumption
Module FM-1505) to launch, its radio-frequency region is 70MHz～110MHz, only gets final product long-term work, diameter with one piece of button cell
For 10mm, thickness is only 2.5mm, and the trimmer of external 20pF can change its tranmitting frequency, and transmitting range is more than 30 meters；
Noise signal after part modulation, after power amplifier unit carries out power amplification, drives PZT unit and electromagnetic pulse unit to launch
Low frequency signal and electromagnetic pulse signal.
About the realization of frequency shift wave filter, for increasing the complexity of interference noise source, white noise can have chosen
On the basis of, it is possible to use wave filter, white noise, the constant energy of i.e. every hertz, is transformed into the constant energy of every octave
Pink noise.And realize pink noise with wave filter and also can reduce the low frequency wonder of noise signal.Filter circuit is such as
Shown in Fig. 2, therefore, the present invention mixes sound wave recording shielding device and also includes that a wave filter, described wave filter are connected with element of noise.
This wave filter covers the audiorange of 10Hz～20KHz, utilizes three pole operational amplifiers, it is possible to provide every ten octave-20dB
Transmission characteristic, and frequency characteristic is unrelated with source impedance and load impedance.The white noise obtained and the time domain ripple of pink noise
In shape such as Fig. 3 shown in (a) and (b).
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved according to the above description or to convert, all these modifications and variations all should belong to the guarantor of claims of the present invention
Protect scope.
Claims (6)
1. a mixing sound wave recording shielding device, it is characterised in that include power subsystem, control unit, modulating unit, noise list
Unit, high-frequency emission unit, radio frequency units, power amplifier unit, PTZ unit and electromagnetic pulse unit；Described power subsystem and its
He needs the unit of power supply to be connected, for needing the unit of power supply to provide power supply for other；Described control unit and element of noise
Outfan be connected with the input of modulating unit respectively, control unit is used for generating carrier signal and carrier signal is sent extremely
Modulating unit, element of noise is used for generating noise；The outfan of described modulating unit respectively with high-frequency emission unit, less radio-frequency
Unit, the input of power amplifier unit are connected, and noise, for carrier signal is added noise, is modulated by described modulating unit；
High-frequency emission unit is for receiving the waveform of modulating unit output and launching HF noise signal, and described radio frequency units is used for
Receive the waveform of modulating unit output and launch less radio-frequency noise signal；The outfan of power amplifier unit respectively with PTZ unit and
The input of electromagnetic pulse unit is connected, and power amplifier unit is sent out after being used for receiving the waveform of modulating unit output and carrying out power amplification
Giving PTZ unit and electromagnetic pulse unit, PTZ unit is for receiving the waveform of power amplifier unit and launching low-frequency noise signal, electric
Magnetic field impulse unit is for receiving the waveform of power amplifier unit and launching electromagnetic pulse interference signal；Described element of noise includes white noise
Generator and pink noise generator.
Mixing sound wave the most according to claim 1 recording shielding device, it is characterised in that control unit is single-chip microcomputer, generates
Carrier signal include one or more in sine wave, triangular wave, square wave and narrow pulse signal.
Mixing sound wave the most according to claim 1 recording shielding device, it is characterised in that the modulation system of modulating unit includes
One or more in amplitude modulation(PAM), frequency modulation(PFM), phase-modulation.
Mixing sound wave the most according to claim 1 recording shielding device, it is characterised in that the resonance frequency of piezoelectric ceramic transducer
Rate is located at more than 16KHz.
Mixing sound wave the most according to claim 1 recording shielding device, it is characterised in that the dominant frequency of electromagnetic pulse unit is arranged
Between 10KHz～20KHz.
Mixing sound wave the most according to claim 1 recording shielding device, it is characterised in that the radiation radius of electromagnetic pulse unit
It is set to 5 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610353691.2A CN106059706B (en) | 2016-05-24 | 2016-05-24 | A kind of mixing sound wave recording shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610353691.2A CN106059706B (en) | 2016-05-24 | 2016-05-24 | A kind of mixing sound wave recording shielding device |
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| CN106059706A true CN106059706A (en) | 2016-10-26 |
| CN106059706B CN106059706B (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610353691.2A Active CN106059706B (en) | 2016-05-24 | 2016-05-24 | A kind of mixing sound wave recording shielding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147795A (en) * | 2018-08-06 | 2019-01-04 | 珠海全志科技股份有限公司 | Voice print database transmission, recognition methods, identification device and storage medium |
| CN110190825A (en) * | 2019-06-28 | 2019-08-30 | 南通东峘电子科技有限公司 | The harmonious sonic apparatus of low frequency |
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| CN102594483A (en) * | 2012-03-08 | 2012-07-18 | 南京泰之联无线科技有限公司 | Full-band examination place radio signal shielding device |
| CN103248980A (en) * | 2013-05-15 | 2013-08-14 | 中国人民解放军国防科学技术大学 | Method and device for generating low-frequency sound wave |
| CN105306162A (en) * | 2015-10-29 | 2016-02-03 | 天津光电安辰信息技术有限公司 | Mixing-based recording shielding device and realizing method thereof |
| CN205142236U (en) * | 2015-10-29 | 2016-04-06 | 天津光电安辰信息技术有限公司 | Recording shield assembly of mixing |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006100147A1 (en) * | 2005-03-24 | 2006-09-28 | Robert Bosch Gmbh | Method for damping a high-frequency radiation of a clocked system |
| CN102594483A (en) * | 2012-03-08 | 2012-07-18 | 南京泰之联无线科技有限公司 | Full-band examination place radio signal shielding device |
| CN103248980A (en) * | 2013-05-15 | 2013-08-14 | 中国人民解放军国防科学技术大学 | Method and device for generating low-frequency sound wave |
| CN105306162A (en) * | 2015-10-29 | 2016-02-03 | 天津光电安辰信息技术有限公司 | Mixing-based recording shielding device and realizing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109147795A (en) * | 2018-08-06 | 2019-01-04 | 珠海全志科技股份有限公司 | Voice print database transmission, recognition methods, identification device and storage medium |
| CN110190825A (en) * | 2019-06-28 | 2019-08-30 | 南通东峘电子科技有限公司 | The harmonious sonic apparatus of low frequency |
| CN110190825B (en) * | 2019-06-28 | 2023-08-15 | 南通东峘电子科技有限公司 | Low frequency harmonic wave instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106059706B (en) | 2019-01-15 |
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