DIGITAL SCENT TECHNOLOGY A technical seminar report submitted in partial fulfillment of the requirement for the Degree of Bachelor of Technologyunder BPUT
Name: Priya Regd No: 1101289258 Branch: Electronics & Telecommunication Year: 20011-2015TRIDENT ACADEMY OF TECHNOLOGY
DEPT. OF ELECTRONICS & TELECOMMUNICATION ENGINEERING.TRIDENT ACADEMY OF TECHNOLOGY,BHUBANESWAR
CERTIFICATEThis is to certify that
PRIYA ,bearing Regd.No 1101289258, student of Branch :Electronics and Telecommunication Engineering, Trident Academy of Technology, Bhubaneswar have submitted seminar report on DIGITAL SCENT TECHNOLOGY .This is required for the fulfillment for Bachelors Degree in Electronics & Telecommunication Engineering under BPUT.
Seminar coordinator Head of the Dept. ACKNOWLEDGEMENTI take this opportunity to express my hearty thanks to all those who individually as well as collectively helped me in the successful completion of this seminar.I would like to express my immense gratitude and sincere thanks to Mr. Rizwan Ali Khan ,whose co-operative guidance has helped me in successful completion of this seminar on DIGITAL SCENT TECHNOLOGY . I am very much thankful to Professor Mrs(Dr).Sakuntala Mahapatra(HOD,Dept.of Electronics ) and Seminar coordinator Asso. Prof. Rabindra Bhojray for helping me to complete the seminar successfully. .I express my deep sense of gratitude and appreciation to the entire faculty members in Dept. of Electronics& Telecommunication for their valuable and scholarly guidance, constant supervision and timely advice and non-teaching staff of the Dept. of Electronics & Telecommunication and my friends without whom my endeavors wouldnt have been successful. Name: Priya Branch: ETC A1
Regd No: 1101289258ABSTRACTDigital scent technology(orolfactory technology) is the engineering discipline dealing witholfactoryrepresentation. Its a technology to sense, transmit and receivescent-enabled digital media (such as web pages,video games,moviesandmusic). This sensing part of this technology works by usingolfactometersand electronic noses.Until now, online communication involved only three of our senses hearing ,touch, and sight. New technology is being developed to appeal to our sense of smell.The expression "electronic sensing" refers to the capability of reproducing human senses using sensor arrays andpattern recognitionsystems.
The digital smell is basically a hardware software combination. The hardware part of digital smell will produce the smell, and the software part will evaluate the smell equation and generate specific signals for specific smell and finally that smell will be produced by the device. The hardware device is a device like speaker, like speaker this device is also connected to the computer system. For this device there is also a driver program which will evaluate the digital equation for generating specific gasThis new technology will make it possible to send and receive scented e-mail and to add scent elements to Web sites, to name just a few of its applications. In future these devices will play very well role in our life, such as in Theater, Televisions, internet etc.CONTENT
PAGE NO.1. Introductions
2. Evolutions of digital smell
3. Basic operations
4. Electronic nose
5. Comparison between electronic
Nose and human nose
6. Smell synthesizer
8. Broadcasting of smell
9. Various inventions
11. Facilities and limitations
12. Future applications
26INTRODUCTIONIn this modern age, computers have verified the cause of their existence. They have virtually taken over in every field of todays fast life. Gone are the days when applications of computers were limited to official use only. Today computers have important place in every household purpose, and mainly internet has taken over whole world.There are various causes due to which computers have their own stand in our life. It provides a very good facility of fast processing, sound and picture. The virtual reality concept has provided very good features to the computer systems. The concept of virtual reality is introduced by the computer programmers to provide more attachments to the user. There are several concepts of the virtual reality that are available such as digital smell, virtual theater, electronics hand gloves, multipoint surround sound system, 3d goggles. The digital smell is basically a hardware software combination. The hardware part of digital smell will produce the smell, and the software part will evaluate the smell equation and generate specific signals for specific smell and finally that smell will be produced by the device. The hardware device is a device like speaker, like speaker this device is also connected to the computer system. For this device there is also a driver program which will evaluate the digital equation for generating specific gas.Until now, online communication involved only three of our senses - hearing, touch, and sight. New technology is being developed to appeal to our sense of smell. DigiScents, an interactive media company, is creating iSmell Digital Scent Technology , new software which will enable scents to be broadcast from the Web. Coding of aromas would be downloaded to computer similar to graphics images as audible sounds. Ultimately users will be able to create and modify their own fragrances and post them on the internet . Also discussed the potential for creating smell capture cameras, which could add fragrances coding to images and sounds. This new technology will make it possible to send and receive scented e-mails and to add scent elements to Web sites, to name just a few of its applications.In future these devices will play very well role in our life, such as in Theater, Televisions, internet etc.
EVOLUTION OF DIGITAL SMELLSense of smell is the ability to detect odors. As humans we are limited to the sensation of seven basic odors and their combinations. Although not as highly developed as in various other mammals, this perceptual sense can have a significant impact on how we perceive different objects and messages. Smell is the only sense that cannot be turned off. A person smells all of the time and with every breath, as often as 20,000 times a day.As we know that many scientists have started for the virtual reality from the last 5 to 6 years. As a virtual reality they have got a full concept as virtual theater. These theaters consist of an electronic hand gloves, digital smell, multipoint surround sound system, movement controllable seats, 3d goggles. From this idea the multipoint surround sound system, 3d goggles, movement controllable seats were completed. Now for the user to fill more realistic effects of movies they were introducing the very new facility of digital smell in movies or in games . For example if we are watching a movie and we see burning of tier then we will fill that smell in theater or pc or television. The basic idea for this was given by the perfume making companies for the advertisements of their perfumes.FOUNDER
Founders Dexster Smith and Joel Lloyd Bellenson, experts in bioinformatics and genomics, started from the following idea: If we can find the essence of a biological smell and build a profile, we can digitalize and broadcast it.
They came up with the idea for the company while they were in south beach. Using their scientific knowledge , they indexed and analyzed natural smells said to a common to south beach such as flowers , salt water and suntan lotion.BASIC OPERATION DigiScents indexes thousands of smells based on their chemical structure and their place on the scent spectrum Each scent isthen coded and digitized into a small file. The digital file is embedded in Web content or email. A user requests or triggers the file by clicking a mouse or opening an email. A small amount of the aroma is emitted by the device in the direct vicinity ofthe user. It turns smell into digital code that can be stored on laser discs or as a computer files and it can even be e-mailed. To implement this technology a driver program is needed known as scent stream.
ELECTRONIC NOSE E-noses uses different type of gas sensors .
Each sensor in the array has different sensitivity .
The pattern of response across all the sensors in the array is used to identify the odour. Different e-nose uses different types of gas sensors which form heart of e-nose. The sensor response is recorded and delivered to the signal processing unit. It is then converted into electronic signal by using a transducer and finally it is processed by using the signal processing unit.The electronic nose was developed in order to mimic human olfaction that functions as a non-separative mechanism: i.e. an odor / flavor is perceived as a global fingerprint. Essentially the instrument consists of head space sampling, sensor array, and pattern recognition modules, to generate signal pattern that are used for characterizing odors.
Electronic noses include three major parts: a sample delivery system, a detection system, a computing system.
The sample delivery system enables the generation of the headspace (volatile compounds) of a sample, which is the fraction analyzed. The system then injects this headspace into the detection system of the electronic nose. The sample delivery system is essential to guarantee constant operating conditions.
The detection system, which consists of a sensor set, is the "reactive" part of the instrument. When in contact with volatile compounds, the sensors react, which means they experience a change of electrical properties.
In most electronic noses, each sensor is sensitive to all volatile molecules but each in their specific way. However, in bio-electronic noses, receptor proteins which respond to specific odor molecules are used. Most electronic noses usesensor arraysthat react to volatile compounds on contact: theadsorptionof volatile compounds on the sensor surface causes a physical change of the sensor. A specific response is recorded by the electronic interface transforming the signal into a digital value. Recorded data are then computed based on statistical models.
Bio-electronic noses useolfactory receptors- proteins cloned from biological organisms, e.g. humans, that bind to specific odor molecules. One group has developed a bio-electronic nose that mimics the signaling systems used by the human nose to perceive odors at a very high sensitivity: femtomolar concentrations.
The more commonly used sensors for electronic noses include
metaloxidesemiconductor(MOSFET) devices - a transistor used for amplifying or switching electronic signals. This works on the principle that molecules entering the sensor area will be charged either positively or negatively, which should have a direct effect on the electric field inside the MOSFET. Thus, introducing each additional charged particle will directly affect the transistor in a unique way, producing a change in the MOSFET signal that can then be interpreted by pattern recognition computer systems. So essentially each detectable molecule will have its own unique signal for a computer system to interpret.
conducting polymers- organic polymers that conduct electricity.
polymer composites - similar in use to conducting polymers but formulated of non-conducting polymers with the addition of conducting material such as carbon black.
quartz crystal microbalance- a way of measuring mass per unit area by measuring the change in frequency of a quartz crystal resonator. This can be stored in a database and used for future reference.
surface acoustic wave(SAW) - a class of microelectromechanical systems (MEMS) which rely on the modulation of surface acoustic waves to sense a physical phenomenon.
Some devices combine multiple sensor types in a single device, for example polymer coated QCMs. The independent information leads to vastly more sensitive and efficient devices.
In recent years, other types of electronic noses have been developed that utilize mass spectrometry or ultra-fast gas chromatography as a detection system.
The computing system works to combine the responses of all of the sensors, which represents the input for the data treatment. This part of the instrument performs global fingerprint analysis and provides results and representations that can be easily interpreted. Moreover, the electronic nose results can be correlated to those obtained from other techniques (sensory panel,GC,GC/MS). Many of the data interpretation systems are used for the analysis of results. These systems includeartificial neural network(ANN),fuzzy logic, pattern recognition modules, etc. COMARISON BETWEEN ELECTRONIC NOSE AND HUMAN NOSEThe perception of odorant molecules in the human nose isachieved throughan array of sensory cells called the olfactory epithelium. These cells act as biological sensors thatreact to the presence of odorant molecules by generatingelectrical signals. Thesesignals aresent to the brain through the olfactory cortex andtravel alongthe olfactory nerve.Our biological odor sensors are not specific to single chemicalsbut are specialized for groups of chemical compounds.The cells therefore react strongly to the chemicals for which they are specialized but also to others chemicals, especially if present at high concentrations.Theelectronic nosemimics the same process. 16 non specific gas sensors areexposed to a sample of airand, just like our own cells, are specialized for different families of chemical compounds. After appropriate calibration, the e-nose quantifies (continuously) the odor concentration in o.u./m3 (odour unit per cubic meter).
SMELL SYNTHESIZERThe smell synthesizer means the device which is used to generate the smells. Such as ismell is device used to produce the gas using computer.
There are various types of smell synthesizers available in the market, but for computer the smell synthesizer is made by digiscents industry.ISMELLThe iSmell is a peripheral device, about the size of a PC speaker that connects to a PC via a serial or USB port. It uses consumable cartridges which are used and replaced similar to the way ink jet printers use ink cartridges. It emits natural-based vapors into the user's personal space. ISmell is triggered either on demand by the user (via a keyboard or mouse action) or via a timed or programmed response (as is the case with a DVD ScentTrack).The company's technology turns smells into digital codes that can be stored on laser discs or as computer files, and can even be e-mailed. The iSmell device reads a digital scent file, creates a smell from a "palette'' of 128 chemicals stored in a cartridge, and then wafts into the air with a small fan.
SPECIFICATIONS:1. It has cartridge of 128 chemicals which is able to produce 10,000 Smells.
2. To active this device for computer it will require a driver program called as ScentStream.
The cartridge will contain chemicals either natural oils or synthetic fragrances that will be activated by either heat or air pressure, when you send a signal from your computer. The digital smell device could add another sensory dimension to the sights and sounds of a computer game. Currently 128 chemicals are stored in a cartridge. Similar to an ink jet printer, those oils form the core of a replaceable cartridge, which is inserted in the company's iSmell device. The oils are electrically stimulated in different combinations to create specific smells in response to software prompts programmed into applications such as Web site features, computer games, digital music, and movies. But after some time as user will be more familiar with these smells the cartridge will come in market in which you can add chemicals as many as you want. They are still investigating all the scent combinations that are currently possible with the iSmell device. As the technology becomes more refined, more and more scents and scent combinations will be possible.
"The idea would be to have a box about the size of a small speaker that would be connected to your computer and within that box is this cartridge of odors, having a hundred different small chambers in it, and then on command from the computer, you can choose various odors within that hundred, to be mixed up together and then puffed gently out of this port where you can smell it."SCENTWARESentware is a combination of SoftWare and Hardware. There are two types of software. One allows you to Design your own custom fragrances, and the other allows you to receive the codes for a custom scent and have them activate a spray device so you can smell it. The design software is often as simple as a web page with pictures of familiar scents (apple pie, popcorn, fresh rain, flowers) that you can drag with your mouse into a virtual beaker and mix. The combinations you choose can be saved as a custom fragrance, which gets stored as codes to be passed to a spray device. The spray device is a piece of hardware that can be plugged into one of the serial ports of your computer, the way a printer plugs in. This device has a disposable cartridge with a number of chambers inside, each containing a chemical compound that can be mixed with others to match the custom scent youve created. Scent Mixers are basically programs that will allow the developers to create their own aromas for multimedia. Once the product is available on the Mac platform, consumers will be able to use the Scent Mixer Scent Creation Software, which allows you to create your own scents.SNORTAL
Snortal will be the Internet's first a scent-enabled Web portal. Visiting the Snortal, you will be able to send scented e-mail, design and register your own smells, and create and share ScentTracks for your favorite movies and music.The goal was to create a space where people of all ages can feel as though they are on vacation, having fun. The look was appropriated into all marketing collateral, including press folders and greeting cards.
To ensure odor authenticity, DigiScent has created a ``ScentRegistry,'' a digital index of thousands of scents that the company will license to developers to integrate into games, Web sites, advertisements, movies and music. DigiScent's founders hope that by licensing their scent spectrum, they will create a world of smells for the Internet generation perfumes you can smell online, computer games with the whiff of the jungle or the tang of jet fuel, movies that give audiences the scents of an autumn bonfire.
DATA BASE REMINISCENTSScentObjets can be incorporated in many applications multimedia, for which a license will be required. Whatever the smell that we are the license for can be entered in the ReminiScents data base file.
SCENTTRACKSScentTracks is software. By using this software you can edit the smell, create the smell, create scented greeting cards, add smell for the movies or songs for all these operation there are some tools are given which user can use. File menu: In this file menu they have given new, open, close , save, save as, search, exit, etc. By these new menu of the Scent Tracks user can create several new smells. He has provided certain chemical reaction and on that basic he can easily create smell. By these save and save as menu user can save these smell in the form of chemical reaction.
In this menu user has provided the tools used for greetings menu. Such as pictures as clip art, word art, chart, etc. The created smell or ready smell can be attached to the greeting. Such that when greeting opens it will produce the sweet smell.
In editor menu they have given the editor for both the movies as well as for songs. By using this editor you can add and delete smell at a particular place in a movie or song. So that when that song continues at particular place it will produce that inserted smell. But for that we require different players. Currently they were making Real Player for that smell.
SDKSet of tools to create content with aroma, includes ReminiScents Database, API and DLL of iSmell and him servant and client of ScentStream. Digiscents Launched a Scentware Developers Kit -- Sdk -- at Game Developers Conference.
The SDK is incredibly easy to implement, we expect to see an explosion of scent enabled content. Using the ScentWare(TM) SDK, a developer can scent enable a game within an hour, said DigiScents Director of ScentStream(TM) Technology, Cooksey Thomas, who previously developed the Sega Dreamcast's audio API. "The SDK contains all we need to create killer scented games that allow gamers to smell environments, entities, and prizes."
SCENTED MULTIMEDIAAny Web technology that supports scripting i.e. Flash, Shockwave, Director, Microsoft Media player etc.. Can use a scripted implementation of the ActiveX control. DigiScents has created two ActiveX controls to meet different web page design needs.
BROADCASTING OF SMELLDIGITIZED SCENT:
A scent is indexed along two parameters, its chemical makeup and its place in the scent spectrum, and then digitized into a small file.
The digital file is scent, attached to enhanced web content.
DigiScents iSmell, which connects to the users computer like a set of speakers, synthesis the smell from a palette of primary odours , following the guidelines of the digital file.
iSmell technology turns smell into digital codes that can be stored on laser discs or as computer files and it can even be emailed. It reads the digital scent file, creates a smell from a palette of 128 chemicals stored in a cartridge, which wafts into the air with a small fan.SMELL-O-VISSION
Smell-O-Visionwas a system that releasedodorduring the projection of afilmso that the viewer could "smell" what was happening in the movie. The technique was created by Hans Laubeand made its only appearance in the1960filmScent of Mystery, produced byMike Todd , Jr., son offilm producerMike Todd. The process injected 30 odors into a movie theater's seats when triggered by the film's soundtrack.Smell-O-Vision did not work as intended. According toVariety, aromas were release with a distracting hissing noise and audience members in the balcony complained that the scents reached them several seconds after the action was shown on the screen. In other parts of the theater, the odors were too faint, causing audience members to sniff loudly in an attempt to catch the scent. These technical problems were mostly corrected after the first few showings,SMELL O-PHONE
The Scentee device can be attached to phones and used to send smells. When we press 'Puff' on thesmartphone's screen, the Scentee lights up and a puff of scent is released from a scent tank attached to the underside of the device.'We can also use it to add a scent to the notification sound whenever you get a new email.' The company also think the Scentee could be used with games.For example, shooting games could come with a gunpowder scent.These tanks can be fitted to the underneath of the Scentee, and can be swapped around depending on what smell you want to send.
The Scentee is plugged into the phone using the phone's connector.
To send a smell the sender clicks the Puff button on the screen.
The recipient's Scentee lights up and a 'puff' of scent is released from a hole on the right hand side of the connected device.The company has already released an SDK that links applications and devices, and is hoping that developers will use this kit to start developing apps that use the technology.
DIGITAL SCENT PROJECTOR
Its features include: A Digital Movie Projector, A sense of smell signal converter and a set of scent making devices. A digital movie projector uses a full frequency sound channel as its passageway to transmit sense of smell digital signal or adding a sense of smell digital signal transmission passageway besides the several full frequency and a low frequency sound channel. After being processed by the sense of smell signal converter the sense of smell signal is transmitted into the scent making devices. The scent making devices uses the scent transmission passageway to transmit the scent of the scent can into the pressure-reducing valve and sound muffler, with help of the air compressor and the controlling valve. And finally the scent is released into the cinema from the scent outlet devices installed under or by the audience seats. With this proposal and without any modification to a digital movie projector, the sense of smell signal can be programmed into digital movies.SCENT RHYTHEM WATCH Ref:http://i.dailymail.co.uk/i/pix/2014/01/27/article25467341ADAE71300000578657_3
The idea of a watch constantly buzzing with reminders for appointments and workouts as well as texts and emails might prove stressful and unwelcome for some people.
But now a concept for a different type of smartwatch promises to measure the passing of time in a number of scents, rather than beeps and buzzes.
One computer expert has created a prototype watch that includes four dinky perfume bottles, which release fragrances associated with different times of the day.The ScentRhythm watch is bulky as it features four perfume bottles as well as the mechanics to release the scents.It is intended to feature fragrances associated with waking up, relaxing, times of activity and sleeping.
Each of the four glass vials holds a millilitre of scent and every six hours the smartwatch releases a whiff of the perfume selected for the specific time of day
APPLICATIONSThere are four basic types of applications that scentware seems a logic fit for at the moment.
Perfume manufactures are an obvious fit. They would be able to benefit from doing market research across the net, emailing you samples of some new fragrance they might be trying out to see how you like it, and using your feedback to shape the final product. And the heck with scratch-and-sniff cards in your favorite magazine. Now well smell their latest and greatest when arrive at your favorite womens website or online boutique.ONLINE INTERACTIVE GAMES:
Imagine smelling the scent of an opponent in an interactive online role-playing game or smelling the damp cave your character is trapped in. Games with scented environments, entities and prizes are more immersive and realistic. Scented games will soon be the standard in interactive media, just as games with sound became prevalent as soundcards became common.COMMUNICATION:
Scent offers developers as well as consumers another medium for creativity and self-expression. Scented web sites, electronic greeting cards and e-mail will enliven all e-communication.E-COMMERCE:
Scent will bring the online shopping experience to life. Scent-enabled shopping sites will be more compelling if you can actually smell perfume, flowers, food and beverages, cigars, and exotic places.
EFFECTS OF DIGITAL SMELL FOR DIFFERENT SITESOVER THE THEATER:
After some time the virtual theaters will come in the market. This virtual theater is basically the concept of the virtual reality. These theaters will have electronic hand gloves, digital smell synthesizer, multipoint surround sound system, 24 movement controllable seats, 3d goggles. From this idea the multipoint surround sound system, 3d goggles, movement controllable seats were completed. Now for the user to fill more realistic effects of movies they were introducing the very new facility of digital smell in movies or in games. For example if we are watching a movie and we see burning of tier then we will fill that smell in theater.
OVER THE TELEVISION:
Now a days as new and new sound technology came in picture our home television is changing, getting more and more powerful sound with it. After some time over television will came will more clear picture, better voice as well as ismell device, which will create more interest in watching the television.
OVER THE INTERNET:
DigiScents technology will be used to add a new dimension to e-commerce and entertainment technology: adding scent to movies, online advertising and interactive games are just a few of the possibilities. "Online greeting cards will be one of the first big plays. We digitize and broadcast scent over the Internet and analyze the molecular structure and sensory perception of an odor and software-code it. The iSmell is a peripheral that is the size of an electronic pencil sharpener; it connects to a USB port. Its scent cartridge would be like a color printer cartridge but with 128 scent 2elements to combine. These elements will combine to make thousands of scent combinations.
Its this power that makes the addition of scent to the classroom experience such an interesting new ally. Virtual field trips have become an invaluable tool for bringing important experience into the classroom where time or geography may otherwise prevent them. The addition of Smell is acknowledge as a tool that enhances the memory of that experience, and amount of knowledge that is retained because of it.
A new Tool for Catching Degenerative Neurological Diseases Early Aromatherapy will perhaps be one of the big drivers of home computer scentware sales. In addition to ergonomically correct keyboards and mice, music while we work, and even computer-based workouts to help you keep fit, you can now add smell to your list of tools for increasing personal wellbeing. The benefits of aromatherapy go beyond personal pleasure. FACILITIES AND LIMITATIONS FACILITIES:
1. As we now that user can send any type of smell so the ismell is designed in such a way that it will give protection against that smell.
2. The scent cartridges contain mostly natural materials commonly found in the cosmetics, foods and beverages you use every day.
3. There might be possibility that user has allergy from any smell so for this problem the ismell provides locking facility. So that user can lock that particular smell which he doesnt like.
The obvious one is the price. Most home computer users wont be willing to pay the $250-500+ price tag for the luxury of scratch-and-sniff websites. Some diehard game fans may find the olfactory add-on a worthwhile boost to their multimedia experience, but chances are this technology will find its first strong market in small kiosks and other specialty shops.
While many fragrance manufacturers will find the ability to use scentware for both market research and the generation of new sales, most of the ScentWare application available today operate at a very simple level and arent capable of reproducing the very complex protein level of molecule modeling that commercial fragrances require. Specialty food marketers will face the same problem. While pizza, popcorn and apple pie are already stock smells in a number of scentware collections, exact replicas of some of the more complex branded foods that big distributors want to entice you with just wont be possible yet. While a few years old, the technology is still immature, and will require a committed partners and reasonable investment to customize the results in a way thats suitable for companies whose smell is their branding.FUTURE APPLICATIONSPossible and future applications in the fields of health and security The detection of dangerous and harmful bacteria, such as software that has been specifically developed to recognise the smell of the MRSA (Methicillin-resistant Staphylococcus Aureus).It has been theorised that if carefully placed in hospital ventilation systems, it could detect and therefore prevent contamination of other patients or equipment by many highly contagious pathogens.
The detection of lung cancer or other medical conditions by detecting the VOC's (volatile organic compounds) that indicate the medical condition.
The quality control of food products as it could be conveniently placed in food packaging to clearly indicate when food has started to rot or used in the field to detect bacterial or insect contamination.
Nasal implantscould warn of the presence of natural gas, for those who hadanosmiaor a weak sense of smell.
TheBrain Mapping Foundationused the electronic nose to detect brain cancer cellsPossible and future applications in the field of crime prevention and security The ability of the electronic nose to detect odourless chemicals makes it ideal for use in the police force, such as the ability to detect drug odours despite other airborne odours capable of confusing police dogs. However this is unlikely in the mean time as the cost of the electronic nose is too great and until its price drops significantly it is unlikely to happen.
It may also be used as a bomb detection method in airports. Through careful placement of several or more electronic noses and effective computer systems you could triangulate the location of bombs to within a few metres of their location in less than a few seconds.In environmental monitoring For identification of volatile organic compounds in air, water and soil samples.
For environmental protection.CONCLUSION A scent has a strange power over human beings . It can create a mood , intensify our emotions . And so far this technology is quite successful in bringing virtual reality nearer to the reality . Hence we conclude that this technology will revolutionized the world and will become our need in future.
 Martin , James A , Sniff That websites. PC World , 2007-07-06 Kim, Hyunsu , an X-Y addressable Matrix Odor-Releasing System using and on-off switchable device. Angewandte Chemie50 , 6771-6775
 Amanda Kooser , Japanese scientists create smell-o-vission screen , CNET,April 3, 2013. Smelly device would liven up web browsing , Newscientist , 2004-02--20