• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13
  14. 14
    14
  15. 15
    15
  16. 16
    16
  17. 17
    17
  18. 18
    18
  19. 19
    19
  20. 20
    20

Ultrasounds and why they are helpful to humans

Extracts from this document...

Introduction

EXTENDED ESSAY Ultrasounds and why they are helpful to humans Ivan La Bruna D #0261-011 American School of Milan IB Extended Essay May 2003 Word Count: 3770 Abstract Ultrasounds are sound waves that exceed the limit of human hearing. In latin ultrasound means that it goes beyond a boundary, in this case the sound wave goes over our hearing capacities. The study of sound waves could be considered ancient study because sound was always an interest of the people. This is why people created many musical instruments in different areas, the most curious thing is that the shapes differ from location and also produce different sounds. Without these studies on sound scientists or explorers probably would have not reached the level of wave reproduction there is in modern times. In the past sound waves were reproduced with wind and string instruments while in modern days scientists are able to create a sound wave with specific requirements. What will be discussed in this essay will be an explanation on what aer ultrasounds and why they are applied to society. Ultrasounds are used mainly in the medical environment but also in detecting the distance of objects, on submarines, and other uses which will be discussed. The good thing about ultrasounds is that they are not very expensive and for this reason it has expanded more and more. For example ultrasounds are used in the medical world to scan the fetus in the womb of a woman, thanks to this equipment the doctors are able to control the fetuses health without harming the fetus and not making the client pay expensive bills. The positive aspect of ultrasounds is that by using a moderated frequency it does not harm the skin tissues of our body nor other organs, it is a safe method to image parts of our bodies without harming them, this is why it is used so often. ...read more.

Middle

To be more precise: "Acoustics is the science of sound, including its production, transmission and reception."13. Since sound is the propagation of mechanical energy traveling into a material medium, the waves are most likely to contain data and information. The waves contain so much information that not all of it is wanted, most of it is what we call "noise" and it can interfere with the other sets of information that a wave can contain. With acoustics people are able to delete that part of "noise" and obtain clear and precise data, the "noise" obstructs and is also unnecessary, acoustics also gives a chance to scientists to study sound in all its depth14. The way we hear depends by many factors, sex, age, and especially by the person itself on how he treats its ears. For example a disc jockey tend to lose a little bit of audibility due to the extended exposure of the ear to loud music in clubs and in his headphones; due to this dj sometimes have autite problems and have to wear ear plugs to heal the ear. It also depends on the pressure of the wave, sound waves have pressure and if the pressure is really high then our ear will have hard times to hear beacause it might be too strong for it. How it is produced Humans can produce sounds in many ways but the result is that the hearing system cannot capture sounds higher than approximately 20,000 Hz and so they are unaware of the other sounds that are created. To produce such a high frequency a technical equipment is needed, most cases transducers are used. A transducer is an acoustical signal processing unit15, there are mainly two types of transducers: the first one is a receiving transducer that detects signals and the second one is a transmitting transducer which sends signals out into space. ...read more.

Conclusion

Also x-rays seem to map the most dense parts of the body rather than just the tissues, (Diagram 8 compared with Diagrams 1,2,4). There are no applications in curing people with ultrasounds now days. Doctors and scientists have still not found a way to use ultrasounds to cure diseases, for now it could only be helpful in the mapping environment, maybe in the future there will be some way to cure people, maybe by using the pressure property of ultrasounds. Which can become really strong since it can sterilize jewelry. Diagram 8 29 X-ray image of a person chest, most of the bones are quite visible. If ultrasound will continue to progress probably its use will increase since it does not harm the human body as others that don't such as chemotherapy, x-rays, and other methods of curing that have side effects in the long term. In fact ultrasounds are known to not have bad side effects to the body nor the skin, if really high frequencies are used then the body may resent the application of these frequencies. With the use of technology that is in fast progress, the equipment is not very expensive and this is a positive aspect especially in the medical field which gives a chance to many people to have use of the equipment. The more technology improves the more the equipment will be less expensive, in 1930 the ultrasonic devices were really expensive while in modern times most hospitals have equipment for fetus scanning. The usage of sound is becoming more frequent also in other areas, because the concept can be applied easily and also the equipment is very cheap in confront to other equipment, this is why it started to be helpful to humans. It was applied to society because it was not expensive and it's improvement was increasingly incrementing. If ultrasounds continue its progression then ultrasounds may be a new frontier of study that will bring the medical environment to improve to such a point that everything will be less expensive and be less harmful than other methods. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Design and Technology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Design and Technology essays

  1. Select either a qualitative or quantitative study, then make a critical analysis of it ...

    (Zikmund, 1991, p42). Typically the research sample size in a quantitative approach would be reasonably large, researchers involvement in this stage of the research process is limited, with the researcher acting as an independent observer. Incorporating this within the research method and design of the study, there should be ideally

  2. Robotics.There are many different types of robots used to do many different types of ...

    As a general rule: the accuracy and/or repeatability of a robot arm should usually be higher than what is required by the task, because that then allows a degree of flexibility. Current robots with 1 metre reach can achieve accuracies of 0.2mm and repeatability of 0.1mm.

  1. Robots.- the concept of a robot this project is concerned with, the history of ...

    buried cable or a painted line, stopping whenever their sensors detect an object or person in their path. More complex mobile robots are used in more unstructured environments such as mining. Artificial Intelligence The subfield of computer science concerned with the concepts and methods of symbolic inference by computer and symbolic knowledge representation for use in making inferences.

  2. Were developing a shoe removal detector which identifies and notifies a person entering the ...

    have interviewed some people from different countries I.e Asia, Western, mid-eastern and Indian people whether they would like to purchase our product and what would be a reasonable price. Most of the Asian/Indian people are positive and likely to purchase the product, because they want to let their multi cultured visitors know about this shoe removing custom.

  1. Materials notes - properties and uses of different materials.

    - Ornaments - Difficult to identify if clear liquid is poured into a glass container (clear) 7 Fabrics (fibre) - Cotton - Silk - Wool - Nylon (artificial) - Leather - Cotton <-- cotton plant - Silk <-- silk worm - Wool <-- sheep - Nylon <-- man made -

  2. My product study will focus on a &amp;quot;smallish stereo-headphone cassette player&amp;quot; (Klein's description of ...

    * ABS is shock resistant: another vital material quality as if the product is going to be used a lot it needs to endure small daily shocks and protect the internal components, as well as the tape, without breaking itself.

  1. Textiles essay on environmental factors, product life, manufacturing methods and maintenance in relation to ...

    On the other hand, the buyer may not want to return to the same company if their previously purchased product broke so this is something that a designer would have to take into consideration when designing the product as they may lose business through doing this.

  2. Uses For Polymers - my bullet proof vest design.

    advancement in science technology will soon enable us to feature even more spectacular context in our clothing. Biodegradability The meaning of the term, biodegradable, is that when the product finally becomes of no use, it can be broken down and completely dissolved and destroyed.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work