Directed loudspeaker. Innovative acoustic directional sound systems
The idea of \u200b\u200bcreating an emitter of directional sound has a long history. Also in late XIX. The century famous for its extremely visual experiments American physicist Robert Wood, together with his friend, the porter designed almost a three-meter cardboard megaphone with a diameter of more than half a meter. According to William Sibruck, Vouda biographer, with his help it was possible to transfer a voice to a very long distance - to make unexpected comments to people standing in two or three quarters. Sitting in Wood's room on the top floor at home on Mc Culloch Street, they waited for a suitable sacrifice. A man who goes on a blank street at the end of the quarter, said: "I apologize, you have dropped something." He stopped, looked back, then under his feet and, after it, it was going on.
What is a directional sound?
A directional sound is an effect in which the sound applies like a spotlight beam in a strictly specified direction and "beats" in a clearly specified space. If a person who is in this place will leave him, he will stop hearing the transmitted audio message.Presentations for viewing:
How to get directional sound?
To get a directional sound from the usual dynamics, it would have to make the size of the house. The problem is that the sound that is created in ordinary loudspeakers, columns, has no pronounced direction: it extends to all parties due to the phenomenon, which is called the diffraction of acoustic waves in physics. Simply put, it is to envelop the sound wave of obstacles or the "erosion" of the sound beam. The degree of "blur" depends on the wavelength and on the size of its source. In order to get rid of the unwanted dispersion of the sound, the length of the sound wave must be substantially (by 3-4 orders) less than the source size.The human ear can perceive only multi-meter waves, the length of which significantly exceeds the dimensions of traditional speakers. To turn the usual speaker in the sound "laser", it would have to make it the size of a multi-storey house.
Reducing the length of the sound waves in order to create a narrow sound beam will lead to the fact that the person simply cannot hear it.
How to "settle" sound?
The solution was found in 1997 by Joseph Pompei, the founder of Holosonics. They developed a device consisting of a set of ultrasonic emitters, which first converts a normal beep to a special ultrasonic format. The length of the ultrasound wave is much smaller than the size of the dynamics (only a few millimeters), so the waves are emitted by a narrow beam. Then, right in the air (approximately half a meter) due to its properties, the disclosure of "laid" in ultrasonic pulses of audible frequencies occurs.As a result, the ultrasound radiated by the speakers forms a sound pillar with a diameter of about a meter. Being inside this post, a person hears high-quality sound, but it is worth it to take a step to the side ... and the sound almost disappears!
Such a sound pillar can be directed, like the spotlight beam, personally or another listener. It can be reflected from the walls as a ray of light, while maintaining its narrow orientation. At the same time, the reflection of sound from the surfaces inside the post (for example, from people) is almost not heard to those who are outside.
The device allows you to achieve almost impossible: without any headphones and sound insulation to direct the sound at the desired point with an accuracy of several centimeters.
Directional sound features:
- Sounding at the same time several "zones" at a distance of 1.5 - 2 meters from each other in one room without creating messy noise;
- Providing local sound in the desired place while maintaining silence in the room as a whole.
Application area
- Equipment of shops of shopping complexes without excess noise;
- Sound equipment of exhibitions and exhibitions;
- Equipment museums and demonstration halls;
- Equipment of audio advertising goods and services;
- Sound equipment for banks and offices;
- Conducting mass events and shares;
- Equipment of beauty salons, SPA and fitness centers
Multimedia in complex or sound sensitive rooms.
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In museums |
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In libraries |
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Voice of advertising boards on the streets |
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Vidavision offers various directional sound systems
They are created on the basis of the most advanced achievements and give the sound a new quality - localization.
Advantages of directional sound:
- It is possible to voice one or more areas in the room, retaining silence as a whole.
- The distance between the voiced zones is from 1 meter without prejudice to the sound picture.
- Various design options are from invisible on the background of the ceiling and walls, to futuristic "domes."
- A wide selection of sound zone and fastening height.
Underwater speakers.
The underwater column is based on the principles of "tactile sound", it allows you to listen to music under water. Thanks to unusual technology, there is no sound distortion, as if you tried to listen to the speakers from under the water, which are on land.
Submarine columns are:
- Very clear sound under water .--
- Easy installation in any pool.
- It is used to prepare athletes, water therapy, in private pools.
In the mid-90s, the first samples of underwater speakers appeared, as the result of using tactile sound technologies for hearing information in the 1Gz-800Hz range in the aquatic environment. Such speakers found themselves numerous applications, from private pools, before training athletes- synchronists and swimmers. Due to the fact that underwater speakers are easily installed in the pool into a standard light niche, or simply fall into the water on the cable, clean and clear sound under water became accessible to all pool owners. In particular, underwater speakers are in demand by those who use the pool regularly - for swimming, entertainment guests and just relaxation. Where underwater columns are used:
- Training pools.
- Various prestigious resorts.
- Olympic training center.
- Private pools.
- Training of synchronous sailing commands.
- Sea biological research.
- For the interaction of military divers.
- Training of marine animals.
Among the manufacturers of underwater acoustics, the highest quality and interesting solutions are offered by Aquasonic, Realsound, Clark Synthesis Tactile Sound.
Hidden voice.
Solid Drive is a miniature sound converter of a hidden voice system, transmitting the acoustic energy of the surface, transforming any object to a high-quality sound source. Glass shop windows turn into one big speaker, which allows you to attract buyers by passing sound through the glass and without resorting to the complex installation of acoustic systems.
The Solid Drive used the technology of using powerful neodymium magnets, as well as paired symmetrically located motors designed to transform sound into strong vibrations, which in turn are transmitted by solid surfaces. The device is capable of any solid surface to turn into a speaker. There is the possibility of strict limitation of the space-visible space, the ability to use as a stereo and mono emitter using two built-in convex aluminum1 "micro emitters.
Interior acoustics.
Also ready to offer the interior hidden acoustics of Amina Technologies. The company's products can be completely hidden from eyes, sharpen, paint or stick with wallpaper. And your walls drown in the literal sense of the word.
All-weather speakers.
All-weather designer speakers with good sound for use on open space - The result of more than seventy-year-old collaboration of acoustic engineers, artists, and sound designers. The result of this work was the most reliable and weatherproof professional sound equipment of the Hi-End class: columns in the form of stones, flower pots and even coconut palm trees.
Such columns are used for:
- Landscape design
- Private houses
- Hotels
- Registration of parks
When choosing high-quality and reliable all-weather acoustics, it is worth paying attention to the products of B & W, Speaker Craft, Acoustic Energy, Monitor Audio.
Tactile sound.
TACTILE SOUND features:
- TACTILE SOUND allows you to feel the sound with all body.
- Low-band sound from 20 Hz, up to 17 kHz allows you to feel all shades, and not just shake everything around.
- Tactile Sound is tested in Russian cinemas and museums, its effect was marked as amazing.
- The effect of tactile sound is achieved not due to the volume.
- The standards of installation in the chair, under the floor, or flooring.
The TACTILE SOUND system enjoys the greatest demand as an addition to home theaters and playing systems. With Tactile Sound, visitors to the Paleontology Museum will not forget, as, shuddering land, a giant lizard passed by them, and cadets, sitting at a combat simulator, fully loaded into the atmosphere of hostilities. Technology. Solid Drive ™ was created on the basis of a patented technology using very powerful neodymium magnets and paired symmetrically arranged motors to convert the sound signal into strong vibrations transmitted by solid surfaces with direct contact. Qualitative sound in the range of 70Hz-15kHz begins to play with the entire surface.
The direction of any source depends on the size of the source itself, depending on the wavelength created by the source. The wavelength of the audible range ranges from several centimeters to several meters, and since these waves are commensurate with the size of the speaker itself, the sound is distributed omnidirectional. Only the creation of sound sources, in size of superior wavelengths, can lead to the creation of a directional sound.
In other words, the loudspeaker with a diameter of 20 meters does not suit anyone.
For creating directed sound beam From a small source, the Audio Spotlight system uses ultrasound.
The wavelength of ultrasound radiation is only a few millimeters, that is, it is much less than the radiation source, and therefore it spreads itself to a very narrow beam and in the end we get "".
Of course, the ultrasound itself is not perceived by the human ear. But when the ultrasonic beam passes, the nonlinear properties of air change its properties. The introduction of predictations, the formation of the desired ultrasonic beam and the use of nonlinear properties of air allow to obtain the required.
Note that the sound source is not the device itself, which you see, but an invisible beam of ultrasound radiation, which can spread by many meters ahead. Therefore, the received directed audio soundit spreads narrowly as a ray of light.
The idea of \u200b\u200busing high-frequency waves to obtain low-frequency signals was first suggested by physicists and mathematicians developing techniques for underwater hydrolections for more than forty years ago. Over the past few decades, many have tried to use this technology to receive directed audio sound And failed. And only the stubborn work of mathematicians and physicists led to the creation of the system directed soundAudio Spotlight, which is still the only one in its kind, providing a low level of distortion and high level sound quality.
The technology of using non-linear interaction of high-frequency waves to obtain low-frequency waves was first developed by scientists in the creation of equipment for underwater hydrolycation in the 60s. These early studies laid the basic knowledge on this problem, as a result of which an innovative hydrolytator was developed with a large focus, which today we call a parametric array.
In 1975, the first publications appeared, confirming the existence of these nonlinear effects. And although scientists have not yet been able to create directed radiation devices, the first assumptions appeared that it is possible.
Over the past two decades, several large companies, including Matsushita (Panasonic), NC Denon and Ricoh, have attempted to create loudspeakers based on these principles. They even achieved certain success, but the problems with the price, extremely large distortions put a cross in these developments.
In the late 90s graduate Northwestern University, Joseph Pompei founded the '3D Audio'. He decided to use ideas about creating loudspeakers based on ultrasound. The studies conducted allowed to expand knowledge in this area. Careful mathematical analysis and fundamental knowledge in the field of physics allowed him to become the first, and today the only, creator systems of high quality directional sound Audio Spotlight.
/ Audio Equipment / Acoustic Systems / Systems of directional soundLearn to drive sound right now! Order in the online store av complex systems of directional sound At a better large-time price and on mutually beneficial terms of cooperation.
What is a directional sound?
Directed sound is called its distribution in one direction. At the same time, his sound is the same as close to the speaker and at a distance of up to 40 m. It effective tool To organize advertising, sound maintenance in museums and of course to attract interest from visitors to a stand at various events.
Speakers and speakers of directional sound - It is also an excellent solution to limit the sound space, speech confidentiality in the premises, attracting attention, improving the labor ability and creating a wonderful mood at office staff and their customers.
Applying these devices will help you approach the organization of sound space in any room from the new side.
How much are the system of directional sound?
Would you like buy directional sound systems? Our specialists will help you with this. All information at the cost, delivery and availability of discounts and stocks you can learn from them. Delivery of the system, speakers, speakers are carried out in promptly short terms throughout the territory of the Russian Federation and the CIS countries.
/ Audio Equipment / Acoustic Systems / Systems of directional soundLearn to drive sound right now! Order in the online store av complex systems of directional sound At a better large-time price and on mutually beneficial terms of cooperation.
What is a directional sound?
Directed sound is called its distribution in one direction. At the same time, his sound is the same as close to the speaker and at a distance of up to 40 m. This is an effective means for organizing advertising, sound support in museums and of course to attract interest from visitors to a stand at various events.
Speakers and speakers of directional sound - It is also an excellent solution to limit the sound space, speech confidentiality in the premises, attracting attention, improving the labor ability and creating a wonderful mood at office staff and their customers.
Applying these devices will help you approach the organization of sound space in any room from the new side.
How much are the system of directional sound?
Would you like buy directional sound systems? Our specialists will help you with this. All information at the cost, delivery and availability of discounts and stocks you can learn from them. Delivery of the system, speakers, speakers are carried out in promptly short terms throughout the territory of the Russian Federation and the CIS countries.
