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Technology Devices For Overcoming Limitations Of Sight And Hearing
Transcript of Technology Devices For Overcoming Limitations Of Sight And Hearing
For Overcoming Limitations Of Sight Techonology Devices
Limitation Of Hearing All humans have sight and
hearing limitations .
So , there are technology devices to
overcome all the limitation. Thank you. by Nur Syafiqah (2A)
Technology devices for
sight and hearing Welcome to my folio entitles Technology devices for overcoming the limitations of sight and hearing. Humans have sight and hearing limitations . Limitations of sight can be overcome by using appropriate optical devices such as microscope . The range of frequency of hearing in human is from 20 Hz – 20 000 Hz and it is different according to the age of the person. We can overcome hearing and sight limitations by using appropriate technological devices.
Introduction ~ An instrument used to see objects that are too small for naked eye.
~ The first microscope invented by Zacharias Janssen.
~ Magnify small organism such as fungi, bacteria , virus and all others organism which can’t be seen with naked eyes. Microscope bb ~ A telescope is an instrument that aids in observation of remote objects by collecting electromagnetic radiation (such as visible light).
~ The main function of the telescope is see far objects in the universe such as moon. Telescope ~Binoculars, field glasses or binocular telescopes are a pair of identical or mirror-symmetrical telescopes mounted side-by-side and aligned to point accurately in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Binocular ~ A magnifying glass (called a hand lens in laboratory contexts) is a convex lens that is used to produce a magnified image of an object.
~ The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
Magnifying Glass ~Ultrasound is an oscillating sound pressure wave with a frequency greater than the upper limit of the human hearing range.
~Ultrasonics is the application of ultrasound. Ultrasound can be used for medical imaging, detection, measurement and cleaning. Ultrasound Machine ~ A periscope is an instrument for observation from a concealed position.
~ In its simplest form it consists of an outer case with mirrors at each end set parallel to each other at a 45-degree angle.
~ More complex periscopes, using prisms instead of mirrors, and providing magnification, operate on submarines. Periscope
~ The stethoscope is an acoustic medical device for auscultation, or listening to the internal sounds of an animal or human body.
~ It is often used to listen to lung and heart sounds. Stethoscope ~ A hearing aid is an electroacoustic device which typically fits in or behind the wearer's ear, and is designed to amplify and modulate sound for the wearer.
~ Similar devices include the bone anchored hearing aid, and cochlear implant. Hearing Aids ~ Headphones are a pair of small loudspeakers that are designed to be held in place close to a user's ears.
~ Headphones either have wires for connection to a signal source such as an audio amplifier, radio, CD player, portable media player or mobile phone, or have a wireless receiver, which is used to pick up signal without using a cable
Headphone / Earphone ~ A loudspeaker (or "speaker") is an electroacoustic transducer that produces sound in response to an electrical audio signal input.
~ Non-electrical loudspeakers were developed as accessories to telephone systems, but electronic amplification by vacuum tube made loudspeakers more generally useful. Loudspeaker ~ A microphone is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal.
~ Microphones are used in many applications such as telephones, tape recorders, karaokesystems, hearing aids, motion picture production, live and recorded audio engineering, FRS radios, megaphones, in radio and television broadcasting and in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic checking or knock sensors. Microphone